diff options
Diffstat (limited to 'activerecord/lib/active_record')
190 files changed, 5079 insertions, 4128 deletions
diff --git a/activerecord/lib/active_record/aggregations.rb b/activerecord/lib/active_record/aggregations.rb index f7b50cd25a..be88c7c9e8 100644 --- a/activerecord/lib/active_record/aggregations.rb +++ b/activerecord/lib/active_record/aggregations.rb @@ -1,6 +1,6 @@ module ActiveRecord - # = Active Record Aggregations - module Aggregations # :nodoc: + # See ActiveRecord::Aggregations::ClassMethods for documentation + module Aggregations extend ActiveSupport::Concern def initialize_dup(*) # :nodoc: @@ -24,8 +24,8 @@ module ActiveRecord super end - # Active Record implements aggregation through a macro-like class method called +composed_of+ - # for representing attributes as value objects. It expresses relationships like "Account [is] + # Active Record implements aggregation through a macro-like class method called #composed_of + # for representing attributes as value objects. It expresses relationships like "Account [is] # composed of Money [among other things]" or "Person [is] composed of [an] address". Each call # to the macro adds a description of how the value objects are created from the attributes of # the entity object (when the entity is initialized either as a new object or from finding an @@ -120,12 +120,12 @@ module ActiveRecord # # It's also important to treat the value objects as immutable. Don't allow the Money object to have # its amount changed after creation. Create a new Money object with the new value instead. The - # Money#exchange_to method is an example of this. It returns a new value object instead of changing + # <tt>Money#exchange_to</tt> method is an example of this. It returns a new value object instead of changing # its own values. Active Record won't persist value objects that have been changed through means # other than the writer method. # # The immutable requirement is enforced by Active Record by freezing any object assigned as a value - # object. Attempting to change it afterwards will result in a RuntimeError. + # object. Attempting to change it afterwards will result in a +RuntimeError+. # # Read more about value objects on http://c2.com/cgi/wiki?ValueObject and on the dangers of not # keeping value objects immutable on http://c2.com/cgi/wiki?ValueObjectsShouldBeImmutable @@ -134,17 +134,17 @@ module ActiveRecord # # By default value objects are initialized by calling the <tt>new</tt> constructor of the value # class passing each of the mapped attributes, in the order specified by the <tt>:mapping</tt> - # option, as arguments. If the value class doesn't support this convention then +composed_of+ allows + # option, as arguments. If the value class doesn't support this convention then #composed_of allows # a custom constructor to be specified. # # When a new value is assigned to the value object, the default assumption is that the new value # is an instance of the value class. Specifying a custom converter allows the new value to be automatically # converted to an instance of value class if necessary. # - # For example, the NetworkResource model has +network_address+ and +cidr_range+ attributes that should be - # aggregated using the NetAddr::CIDR value class (http://www.rubydoc.info/gems/netaddr/1.5.0/NetAddr/CIDR). + # For example, the +NetworkResource+ model has +network_address+ and +cidr_range+ attributes that should be + # aggregated using the +NetAddr::CIDR+ value class (http://www.rubydoc.info/gems/netaddr/1.5.0/NetAddr/CIDR). # The constructor for the value class is called +create+ and it expects a CIDR address string as a parameter. - # New values can be assigned to the value object using either another NetAddr::CIDR object, a string + # New values can be assigned to the value object using either another +NetAddr::CIDR+ object, a string # or an array. The <tt>:constructor</tt> and <tt>:converter</tt> options can be used to meet # these requirements: # @@ -173,7 +173,7 @@ module ActiveRecord # # == Finding records by a value object # - # Once a +composed_of+ relationship is specified for a model, records can be loaded from the database + # Once a #composed_of relationship is specified for a model, records can be loaded from the database # by specifying an instance of the value object in the conditions hash. The following example # finds all customers with +balance_amount+ equal to 20 and +balance_currency+ equal to "USD": # @@ -186,7 +186,7 @@ module ActiveRecord # Options are: # * <tt>:class_name</tt> - Specifies the class name of the association. Use it only if that name # can't be inferred from the part id. So <tt>composed_of :address</tt> will by default be linked - # to the Address class, but if the real class name is CompanyAddress, you'll have to specify it + # to the Address class, but if the real class name is +CompanyAddress+, you'll have to specify it # with this option. # * <tt>:mapping</tt> - Specifies the mapping of entity attributes to attributes of the value # object. Each mapping is represented as an array where the first item is the name of the diff --git a/activerecord/lib/active_record/associations.rb b/activerecord/lib/active_record/associations.rb index a3c30642d0..f6d8e8a342 100644 --- a/activerecord/lib/active_record/associations.rb +++ b/activerecord/lib/active_record/associations.rb @@ -5,95 +5,170 @@ require 'active_record/errors' module ActiveRecord class AssociationNotFoundError < ConfigurationError #:nodoc: - def initialize(record, association_name) - super("Association named '#{association_name}' was not found on #{record.class.name}; perhaps you misspelled it?") + def initialize(record = nil, association_name = nil) + if record && association_name + super("Association named '#{association_name}' was not found on #{record.class.name}; perhaps you misspelled it?") + else + super("Association was not found.") + end end end class InverseOfAssociationNotFoundError < ActiveRecordError #:nodoc: - def initialize(reflection, associated_class = nil) - super("Could not find the inverse association for #{reflection.name} (#{reflection.options[:inverse_of].inspect} in #{associated_class.nil? ? reflection.class_name : associated_class.name})") + def initialize(reflection = nil, associated_class = nil) + if reflection + super("Could not find the inverse association for #{reflection.name} (#{reflection.options[:inverse_of].inspect} in #{associated_class.nil? ? reflection.class_name : associated_class.name})") + else + super("Could not find the inverse association.") + end end end class HasManyThroughAssociationNotFoundError < ActiveRecordError #:nodoc: - def initialize(owner_class_name, reflection) - super("Could not find the association #{reflection.options[:through].inspect} in model #{owner_class_name}") + def initialize(owner_class_name = nil, reflection = nil) + if owner_class_name && reflection + super("Could not find the association #{reflection.options[:through].inspect} in model #{owner_class_name}") + else + super("Could not find the association.") + end end end class HasManyThroughAssociationPolymorphicSourceError < ActiveRecordError #:nodoc: - def initialize(owner_class_name, reflection, source_reflection) - super("Cannot have a has_many :through association '#{owner_class_name}##{reflection.name}' on the polymorphic object '#{source_reflection.class_name}##{source_reflection.name}' without 'source_type'. Try adding 'source_type: \"#{reflection.name.to_s.classify}\"' to 'has_many :through' definition.") + def initialize(owner_class_name = nil, reflection = nil, source_reflection = nil) + if owner_class_name && reflection && source_reflection + super("Cannot have a has_many :through association '#{owner_class_name}##{reflection.name}' on the polymorphic object '#{source_reflection.class_name}##{source_reflection.name}' without 'source_type'. Try adding 'source_type: \"#{reflection.name.to_s.classify}\"' to 'has_many :through' definition.") + else + super("Cannot have a has_many :through association.") + end end end class HasManyThroughAssociationPolymorphicThroughError < ActiveRecordError #:nodoc: - def initialize(owner_class_name, reflection) - super("Cannot have a has_many :through association '#{owner_class_name}##{reflection.name}' which goes through the polymorphic association '#{owner_class_name}##{reflection.through_reflection.name}'.") + def initialize(owner_class_name = nil, reflection = nil) + if owner_class_name && reflection + super("Cannot have a has_many :through association '#{owner_class_name}##{reflection.name}' which goes through the polymorphic association '#{owner_class_name}##{reflection.through_reflection.name}'.") + else + super("Cannot have a has_many :through association.") + end end end class HasManyThroughAssociationPointlessSourceTypeError < ActiveRecordError #:nodoc: - def initialize(owner_class_name, reflection, source_reflection) - super("Cannot have a has_many :through association '#{owner_class_name}##{reflection.name}' with a :source_type option if the '#{reflection.through_reflection.class_name}##{source_reflection.name}' is not polymorphic. Try removing :source_type on your association.") + def initialize(owner_class_name = nil, reflection = nil, source_reflection = nil) + if owner_class_name && reflection && source_reflection + super("Cannot have a has_many :through association '#{owner_class_name}##{reflection.name}' with a :source_type option if the '#{reflection.through_reflection.class_name}##{source_reflection.name}' is not polymorphic. Try removing :source_type on your association.") + else + super("Cannot have a has_many :through association.") + end end end class HasOneThroughCantAssociateThroughCollection < ActiveRecordError #:nodoc: - def initialize(owner_class_name, reflection, through_reflection) - super("Cannot have a has_one :through association '#{owner_class_name}##{reflection.name}' where the :through association '#{owner_class_name}##{through_reflection.name}' is a collection. Specify a has_one or belongs_to association in the :through option instead.") + def initialize(owner_class_name = nil, reflection = nil, through_reflection = nil) + if owner_class_name && reflection && through_reflection + super("Cannot have a has_one :through association '#{owner_class_name}##{reflection.name}' where the :through association '#{owner_class_name}##{through_reflection.name}' is a collection. Specify a has_one or belongs_to association in the :through option instead.") + else + super("Cannot have a has_one :through association.") + end end end class HasOneAssociationPolymorphicThroughError < ActiveRecordError #:nodoc: - def initialize(owner_class_name, reflection) - super("Cannot have a has_one :through association '#{owner_class_name}##{reflection.name}' which goes through the polymorphic association '#{owner_class_name}##{reflection.through_reflection.name}'.") + def initialize(owner_class_name = nil, reflection = nil) + if owner_class_name && reflection + super("Cannot have a has_one :through association '#{owner_class_name}##{reflection.name}' which goes through the polymorphic association '#{owner_class_name}##{reflection.through_reflection.name}'.") + else + super("Cannot have a has_one :through association.") + end end end class HasManyThroughSourceAssociationNotFoundError < ActiveRecordError #:nodoc: - def initialize(reflection) - through_reflection = reflection.through_reflection - source_reflection_names = reflection.source_reflection_names - source_associations = reflection.through_reflection.klass._reflections.keys - super("Could not find the source association(s) #{source_reflection_names.collect(&:inspect).to_sentence(:two_words_connector => ' or ', :last_word_connector => ', or ', :locale => :en)} in model #{through_reflection.klass}. Try 'has_many #{reflection.name.inspect}, :through => #{through_reflection.name.inspect}, :source => <name>'. Is it one of #{source_associations.to_sentence(:two_words_connector => ' or ', :last_word_connector => ', or ', :locale => :en)}?") + def initialize(reflection = nil) + if reflection + through_reflection = reflection.through_reflection + source_reflection_names = reflection.source_reflection_names + source_associations = reflection.through_reflection.klass._reflections.keys + super("Could not find the source association(s) #{source_reflection_names.collect(&:inspect).to_sentence(:two_words_connector => ' or ', :last_word_connector => ', or ', :locale => :en)} in model #{through_reflection.klass}. Try 'has_many #{reflection.name.inspect}, :through => #{through_reflection.name.inspect}, :source => <name>'. Is it one of #{source_associations.to_sentence(:two_words_connector => ' or ', :last_word_connector => ', or ', :locale => :en)}?") + else + super("Could not find the source association(s).") + end end end - class HasManyThroughCantAssociateThroughHasOneOrManyReflection < ActiveRecordError #:nodoc: - def initialize(owner, reflection) - super("Cannot modify association '#{owner.class.name}##{reflection.name}' because the source reflection class '#{reflection.source_reflection.class_name}' is associated to '#{reflection.through_reflection.class_name}' via :#{reflection.source_reflection.macro}.") + class ThroughCantAssociateThroughHasOneOrManyReflection < ActiveRecordError #:nodoc: + def initialize(owner = nil, reflection = nil) + if owner && reflection + super("Cannot modify association '#{owner.class.name}##{reflection.name}' because the source reflection class '#{reflection.source_reflection.class_name}' is associated to '#{reflection.through_reflection.class_name}' via :#{reflection.source_reflection.macro}.") + else + super("Cannot modify association.") + end end end + class HasManyThroughCantAssociateThroughHasOneOrManyReflection < ThroughCantAssociateThroughHasOneOrManyReflection #:nodoc: + end + + class HasOneThroughCantAssociateThroughHasOneOrManyReflection < ThroughCantAssociateThroughHasOneOrManyReflection #:nodoc: + end + class HasManyThroughCantAssociateNewRecords < ActiveRecordError #:nodoc: - def initialize(owner, reflection) - super("Cannot associate new records through '#{owner.class.name}##{reflection.name}' on '#{reflection.source_reflection.class_name rescue nil}##{reflection.source_reflection.name rescue nil}'. Both records must have an id in order to create the has_many :through record associating them.") + def initialize(owner = nil, reflection = nil) + if owner && reflection + super("Cannot associate new records through '#{owner.class.name}##{reflection.name}' on '#{reflection.source_reflection.class_name rescue nil}##{reflection.source_reflection.name rescue nil}'. Both records must have an id in order to create the has_many :through record associating them.") + else + super("Cannot associate new records.") + end end end class HasManyThroughCantDissociateNewRecords < ActiveRecordError #:nodoc: - def initialize(owner, reflection) - super("Cannot dissociate new records through '#{owner.class.name}##{reflection.name}' on '#{reflection.source_reflection.class_name rescue nil}##{reflection.source_reflection.name rescue nil}'. Both records must have an id in order to delete the has_many :through record associating them.") + def initialize(owner = nil, reflection = nil) + if owner && reflection + super("Cannot dissociate new records through '#{owner.class.name}##{reflection.name}' on '#{reflection.source_reflection.class_name rescue nil}##{reflection.source_reflection.name rescue nil}'. Both records must have an id in order to delete the has_many :through record associating them.") + else + super("Cannot dissociate new records.") + end end end - class HasManyThroughNestedAssociationsAreReadonly < ActiveRecordError #:nodoc: - def initialize(owner, reflection) - super("Cannot modify association '#{owner.class.name}##{reflection.name}' because it goes through more than one other association.") + class ThroughNestedAssociationsAreReadonly < ActiveRecordError #:nodoc: + def initialize(owner = nil, reflection = nil) + if owner && reflection + super("Cannot modify association '#{owner.class.name}##{reflection.name}' because it goes through more than one other association.") + else + super("Through nested associations are read-only.") + end end end - class EagerLoadPolymorphicError < ActiveRecordError #:nodoc: - def initialize(reflection) - super("Cannot eagerly load the polymorphic association #{reflection.name.inspect}") + class HasManyThroughNestedAssociationsAreReadonly < ThroughNestedAssociationsAreReadonly #:nodoc: + end + + class HasOneThroughNestedAssociationsAreReadonly < ThroughNestedAssociationsAreReadonly #:nodoc: + end + + # This error is raised when trying to eager load a polymorphic association using a JOIN. + # Eager loading polymorphic associations is only possible with + # {ActiveRecord::Relation#preload}[rdoc-ref:QueryMethods#preload]. + class EagerLoadPolymorphicError < ActiveRecordError + def initialize(reflection = nil) + if reflection + super("Cannot eagerly load the polymorphic association #{reflection.name.inspect}") + else + super("Eager load polymorphic error.") + end end end class ReadOnlyAssociation < ActiveRecordError #:nodoc: - def initialize(reflection) - super("Cannot add to a has_many :through association. Try adding to #{reflection.through_reflection.name.inspect}.") + def initialize(reflection = nil) + if reflection + super("Cannot add to a has_many :through association. Try adding to #{reflection.through_reflection.name.inspect}.") + else + super("Read-only reflection error.") + end end end @@ -101,8 +176,12 @@ module ActiveRecord # (has_many, has_one) when there is at least 1 child associated instance. # ex: if @project.tasks.size > 0, DeleteRestrictionError will be raised when trying to destroy @project class DeleteRestrictionError < ActiveRecordError #:nodoc: - def initialize(name) - super("Cannot delete record because of dependent #{name}") + def initialize(name = nil) + if name + super("Cannot delete record because of dependent #{name}") + else + super("Delete restriction error.") + end end end @@ -222,7 +301,7 @@ module ActiveRecord # === A word of warning # # Don't create associations that have the same name as instance methods of - # <tt>ActiveRecord::Base</tt>. Since the association adds a method with that name to + # ActiveRecord::Base. Since the association adds a method with that name to # its model, it will override the inherited method and break things. # For instance, +attributes+ and +connection+ would be bad choices for association names. # @@ -266,7 +345,6 @@ module ActiveRecord # others.find(*args) | X | X | X # others.exists? | X | X | X # others.distinct | X | X | X - # others.uniq | X | X | X # others.reset | X | X | X # # === Overriding generated methods @@ -285,7 +363,7 @@ module ActiveRecord # end # # If your model class is <tt>Project</tt>, the module is - # named <tt>Project::GeneratedAssociationMethods</tt>. The GeneratedAssociationMethods module is + # named <tt>Project::GeneratedAssociationMethods</tt>. The +GeneratedAssociationMethods+ module is # included in the model class immediately after the (anonymous) generated attributes methods # module, meaning an association will override the methods for an attribute with the same name. # @@ -293,12 +371,12 @@ module ActiveRecord # # Active Record associations can be used to describe one-to-one, one-to-many and many-to-many # relationships between models. Each model uses an association to describe its role in - # the relation. The +belongs_to+ association is always used in the model that has + # the relation. The #belongs_to association is always used in the model that has # the foreign key. # # === One-to-one # - # Use +has_one+ in the base, and +belongs_to+ in the associated model. + # Use #has_one in the base, and #belongs_to in the associated model. # # class Employee < ActiveRecord::Base # has_one :office @@ -309,7 +387,7 @@ module ActiveRecord # # === One-to-many # - # Use +has_many+ in the base, and +belongs_to+ in the associated model. + # Use #has_many in the base, and #belongs_to in the associated model. # # class Manager < ActiveRecord::Base # has_many :employees @@ -322,7 +400,7 @@ module ActiveRecord # # There are two ways to build a many-to-many relationship. # - # The first way uses a +has_many+ association with the <tt>:through</tt> option and a join model, so + # The first way uses a #has_many association with the <tt>:through</tt> option and a join model, so # there are two stages of associations. # # class Assignment < ActiveRecord::Base @@ -338,7 +416,7 @@ module ActiveRecord # has_many :programmers, through: :assignments # end # - # For the second way, use +has_and_belongs_to_many+ in both models. This requires a join table + # For the second way, use #has_and_belongs_to_many in both models. This requires a join table # that has no corresponding model or primary key. # # class Programmer < ActiveRecord::Base @@ -350,13 +428,13 @@ module ActiveRecord # # Choosing which way to build a many-to-many relationship is not always simple. # If you need to work with the relationship model as its own entity, - # use <tt>has_many :through</tt>. Use +has_and_belongs_to_many+ when working with legacy schemas or when + # use #has_many <tt>:through</tt>. Use #has_and_belongs_to_many when working with legacy schemas or when # you never work directly with the relationship itself. # - # == Is it a +belongs_to+ or +has_one+ association? + # == Is it a #belongs_to or #has_one association? # # Both express a 1-1 relationship. The difference is mostly where to place the foreign - # key, which goes on the table for the class declaring the +belongs_to+ relationship. + # key, which goes on the table for the class declaring the #belongs_to relationship. # # class User < ActiveRecord::Base # # I reference an account. @@ -371,14 +449,14 @@ module ActiveRecord # The tables for these classes could look something like: # # CREATE TABLE users ( - # id int(11) NOT NULL auto_increment, - # account_id int(11) default NULL, + # id int NOT NULL auto_increment, + # account_id int default NULL, # name varchar default NULL, # PRIMARY KEY (id) # ) # # CREATE TABLE accounts ( - # id int(11) NOT NULL auto_increment, + # id int NOT NULL auto_increment, # name varchar default NULL, # PRIMARY KEY (id) # ) @@ -389,35 +467,35 @@ module ActiveRecord # there is some special behavior you should be aware of, mostly involving the saving of # associated objects. # - # You can set the <tt>:autosave</tt> option on a <tt>has_one</tt>, <tt>belongs_to</tt>, - # <tt>has_many</tt>, or <tt>has_and_belongs_to_many</tt> association. Setting it + # You can set the <tt>:autosave</tt> option on a #has_one, #belongs_to, + # #has_many, or #has_and_belongs_to_many association. Setting it # to +true+ will _always_ save the members, whereas setting it to +false+ will # _never_ save the members. More details about <tt>:autosave</tt> option is available at # AutosaveAssociation. # # === One-to-one associations # - # * Assigning an object to a +has_one+ association automatically saves that object and + # * Assigning an object to a #has_one association automatically saves that object and # the object being replaced (if there is one), in order to update their foreign # keys - except if the parent object is unsaved (<tt>new_record? == true</tt>). # * If either of these saves fail (due to one of the objects being invalid), an - # <tt>ActiveRecord::RecordNotSaved</tt> exception is raised and the assignment is + # ActiveRecord::RecordNotSaved exception is raised and the assignment is # cancelled. - # * If you wish to assign an object to a +has_one+ association without saving it, - # use the <tt>build_association</tt> method (documented below). The object being + # * If you wish to assign an object to a #has_one association without saving it, + # use the <tt>#build_association</tt> method (documented below). The object being # replaced will still be saved to update its foreign key. - # * Assigning an object to a +belongs_to+ association does not save the object, since + # * Assigning an object to a #belongs_to association does not save the object, since # the foreign key field belongs on the parent. It does not save the parent either. # # === Collections # - # * Adding an object to a collection (+has_many+ or +has_and_belongs_to_many+) automatically + # * Adding an object to a collection (#has_many or #has_and_belongs_to_many) automatically # saves that object, except if the parent object (the owner of the collection) is not yet # stored in the database. # * If saving any of the objects being added to a collection (via <tt>push</tt> or similar) # fails, then <tt>push</tt> returns +false+. # * If saving fails while replacing the collection (via <tt>association=</tt>), an - # <tt>ActiveRecord::RecordNotSaved</tt> exception is raised and the assignment is + # ActiveRecord::RecordNotSaved exception is raised and the assignment is # cancelled. # * You can add an object to a collection without automatically saving it by using the # <tt>collection.build</tt> method (documented below). @@ -426,14 +504,14 @@ module ActiveRecord # # == Customizing the query # - # \Associations are built from <tt>Relation</tt>s, and you can use the <tt>Relation</tt> syntax + # \Associations are built from <tt>Relation</tt>s, and you can use the Relation syntax # to customize them. For example, to add a condition: # # class Blog < ActiveRecord::Base - # has_many :published_posts, -> { where published: true }, class_name: 'Post' + # has_many :published_posts, -> { where(published: true) }, class_name: 'Post' # end # - # Inside the <tt>-> { ... }</tt> block you can use all of the usual <tt>Relation</tt> methods. + # Inside the <tt>-> { ... }</tt> block you can use all of the usual Relation methods. # # === Accessing the owner object # @@ -442,7 +520,7 @@ module ActiveRecord # events that occur on the user's birthday: # # class User < ActiveRecord::Base - # has_many :birthday_events, ->(user) { where starts_on: user.birthday }, class_name: 'Event' + # has_many :birthday_events, ->(user) { where(starts_on: user.birthday) }, class_name: 'Event' # end # # Note: Joining, eager loading and preloading of these associations is not fully possible. @@ -521,8 +599,8 @@ module ActiveRecord # # * <tt>record.association(:items).owner</tt> - Returns the object the association is part of. # * <tt>record.association(:items).reflection</tt> - Returns the reflection object that describes the association. - # * <tt>record.association(:items).target</tt> - Returns the associated object for +belongs_to+ and +has_one+, or - # the collection of associated objects for +has_many+ and +has_and_belongs_to_many+. + # * <tt>record.association(:items).target</tt> - Returns the associated object for #belongs_to and #has_one, or + # the collection of associated objects for #has_many and #has_and_belongs_to_many. # # However, inside the actual extension code, you will not have access to the <tt>record</tt> as # above. In this case, you can access <tt>proxy_association</tt>. For example, @@ -534,7 +612,7 @@ module ActiveRecord # # Has Many associations can be configured with the <tt>:through</tt> option to use an # explicit join model to retrieve the data. This operates similarly to a - # +has_and_belongs_to_many+ association. The advantage is that you're able to add validations, + # #has_and_belongs_to_many association. The advantage is that you're able to add validations, # callbacks, and extra attributes on the join model. Consider the following schema: # # class Author < ActiveRecord::Base @@ -551,7 +629,7 @@ module ActiveRecord # @author.authorships.collect { |a| a.book } # selects all books that the author's authorships belong to # @author.books # selects all books by using the Authorship join model # - # You can also go through a +has_many+ association on the join model: + # You can also go through a #has_many association on the join model: # # class Firm < ActiveRecord::Base # has_many :clients @@ -571,7 +649,7 @@ module ActiveRecord # @firm.clients.flat_map { |c| c.invoices } # select all invoices for all clients of the firm # @firm.invoices # selects all invoices by going through the Client join model # - # Similarly you can go through a +has_one+ association on the join model: + # Similarly you can go through a #has_one association on the join model: # # class Group < ActiveRecord::Base # has_many :users @@ -591,7 +669,7 @@ module ActiveRecord # @group.users.collect { |u| u.avatar }.compact # select all avatars for all users in the group # @group.avatars # selects all avatars by going through the User join model. # - # An important caveat with going through +has_one+ or +has_many+ associations on the + # An important caveat with going through #has_one or #has_many associations on the # join model is that these associations are *read-only*. For example, the following # would not work following the previous example: # @@ -600,26 +678,26 @@ module ActiveRecord # # == Setting Inverses # - # If you are using a +belongs_to+ on the join model, it is a good idea to set the - # <tt>:inverse_of</tt> option on the +belongs_to+, which will mean that the following example - # works correctly (where <tt>tags</tt> is a +has_many+ <tt>:through</tt> association): + # If you are using a #belongs_to on the join model, it is a good idea to set the + # <tt>:inverse_of</tt> option on the #belongs_to, which will mean that the following example + # works correctly (where <tt>tags</tt> is a #has_many <tt>:through</tt> association): # # @post = Post.first # @tag = @post.tags.build name: "ruby" # @tag.save # - # The last line ought to save the through record (a <tt>Taggable</tt>). This will only work if the + # The last line ought to save the through record (a <tt>Tagging</tt>). This will only work if the # <tt>:inverse_of</tt> is set: # - # class Taggable < ActiveRecord::Base + # class Tagging < ActiveRecord::Base # belongs_to :post # belongs_to :tag, inverse_of: :taggings # end # # If you do not set the <tt>:inverse_of</tt> record, the association will # do its best to match itself up with the correct inverse. Automatic - # inverse detection only works on <tt>has_many</tt>, <tt>has_one</tt>, and - # <tt>belongs_to</tt> associations. + # inverse detection only works on #has_many, #has_one, and + # #belongs_to associations. # # Extra options on the associations, as defined in the # <tt>AssociationReflection::INVALID_AUTOMATIC_INVERSE_OPTIONS</tt> constant, will @@ -632,7 +710,7 @@ module ActiveRecord # You can turn off the automatic detection of inverse associations by setting # the <tt>:inverse_of</tt> option to <tt>false</tt> like so: # - # class Taggable < ActiveRecord::Base + # class Tagging < ActiveRecord::Base # belongs_to :tag, inverse_of: false # end # @@ -682,7 +760,7 @@ module ActiveRecord # == Polymorphic \Associations # # Polymorphic associations on models are not restricted on what types of models they - # can be associated with. Rather, they specify an interface that a +has_many+ association + # can be associated with. Rather, they specify an interface that a #has_many association # must adhere to. # # class Asset < ActiveRecord::Base @@ -766,7 +844,7 @@ module ActiveRecord # # Post.includes(:author).each do |post| # - # This references the name of the +belongs_to+ association that also used the <tt>:author</tt> + # This references the name of the #belongs_to association that also used the <tt>:author</tt> # symbol. After loading the posts, find will collect the +author_id+ from each one and load # all the referenced authors with one query. Doing so will cut down the number of queries # from 201 to 102. @@ -777,7 +855,7 @@ module ActiveRecord # # This will load all comments with a single query. This reduces the total number of queries # to 3. In general, the number of queries will be 1 plus the number of associations - # named (except if some of the associations are polymorphic +belongs_to+ - see below). + # named (except if some of the associations are polymorphic #belongs_to - see below). # # To include a deep hierarchy of associations, use a hash: # @@ -817,7 +895,7 @@ module ActiveRecord # In this case it is usually more natural to include an association which has conditions defined on it: # # class Post < ActiveRecord::Base - # has_many :approved_comments, -> { where approved: true }, class_name: 'Comment' + # has_many :approved_comments, -> { where(approved: true) }, class_name: 'Comment' # end # # Post.includes(:approved_comments) @@ -849,7 +927,7 @@ module ActiveRecord # For example if all the addressables are either of class Person or Company then a total # of 3 queries will be executed. The list of addressable types to load is determined on # the back of the addresses loaded. This is not supported if Active Record has to fallback - # to the previous implementation of eager loading and will raise <tt>ActiveRecord::EagerLoadPolymorphicError</tt>. + # to the previous implementation of eager loading and will raise ActiveRecord::EagerLoadPolymorphicError. # The reason is that the parent model's type is a column value so its corresponding table # name cannot be put in the +FROM+/+JOIN+ clauses of that query. # @@ -891,7 +969,7 @@ module ActiveRecord # INNER JOIN categories_posts posts_categories_join INNER JOIN posts posts_categories # INNER JOIN categories_posts categories_posts_join INNER JOIN categories categories_posts_2 # - # If you wish to specify your own custom joins using <tt>joins</tt> method, those table + # If you wish to specify your own custom joins using ActiveRecord::QueryMethods#joins method, those table # names will take precedence over the eager associations: # # Post.joins(:comments).joins("inner join comments ...") @@ -956,20 +1034,16 @@ module ActiveRecord # The +traps+ association on +Dungeon+ and the +dungeon+ association on +Trap+ are # the inverse of each other and the inverse of the +dungeon+ association on +EvilWizard+ # is the +evil_wizard+ association on +Dungeon+ (and vice-versa). By default, - # Active Record doesn't know anything about these inverse relationships and so no object - # loading optimization is possible. For example: + # Active Record can guess the inverse of the association based on the name + # of the class. The result is the following: # # d = Dungeon.first # t = d.traps.first - # d.level == t.dungeon.level # => true - # d.level = 10 - # d.level == t.dungeon.level # => false + # d.object_id == t.dungeon.object_id # => true # # The +Dungeon+ instances +d+ and <tt>t.dungeon</tt> in the above example refer to - # the same object data from the database, but are actually different in-memory copies - # of that data. Specifying the <tt>:inverse_of</tt> option on associations lets you tell - # Active Record about inverse relationships and it will optimise object loading. For - # example, if we changed our model definitions to: + # the same in-memory instance since the association matches the name of the class. + # The result would be the same if we added +:inverse_of+ to our model definitions: # # class Dungeon < ActiveRecord::Base # has_many :traps, inverse_of: :dungeon @@ -984,20 +1058,19 @@ module ActiveRecord # belongs_to :dungeon, inverse_of: :evil_wizard # end # - # Then, from our code snippet above, +d+ and <tt>t.dungeon</tt> are actually the same - # in-memory instance and our final <tt>d.level == t.dungeon.level</tt> will return +true+. - # # There are limitations to <tt>:inverse_of</tt> support: # # * does not work with <tt>:through</tt> associations. # * does not work with <tt>:polymorphic</tt> associations. - # * for +belongs_to+ associations +has_many+ inverse associations are ignored. + # * for #belongs_to associations #has_many inverse associations are ignored. + # + # For more information, see the documentation for the +:inverse_of+ option. # # == Deleting from associations # # === Dependent associations # - # +has_many+, +has_one+ and +belongs_to+ associations support the <tt>:dependent</tt> option. + # #has_many, #has_one and #belongs_to associations support the <tt>:dependent</tt> option. # This allows you to specify that associated records should be deleted when the owner is # deleted. # @@ -1018,22 +1091,22 @@ module ActiveRecord # callbacks declared either before or after the <tt>:dependent</tt> option # can affect what it does. # - # Note that <tt>:dependent</tt> option is ignored for +has_one+ <tt>:through</tt> associations. + # Note that <tt>:dependent</tt> option is ignored for #has_one <tt>:through</tt> associations. # # === Delete or destroy? # - # +has_many+ and +has_and_belongs_to_many+ associations have the methods <tt>destroy</tt>, + # #has_many and #has_and_belongs_to_many associations have the methods <tt>destroy</tt>, # <tt>delete</tt>, <tt>destroy_all</tt> and <tt>delete_all</tt>. # - # For +has_and_belongs_to_many+, <tt>delete</tt> and <tt>destroy</tt> are the same: they + # For #has_and_belongs_to_many, <tt>delete</tt> and <tt>destroy</tt> are the same: they # cause the records in the join table to be removed. # - # For +has_many+, <tt>destroy</tt> and <tt>destroy_all</tt> will always call the <tt>destroy</tt> method of the + # For #has_many, <tt>destroy</tt> and <tt>destroy_all</tt> will always call the <tt>destroy</tt> method of the # record(s) being removed so that callbacks are run. However <tt>delete</tt> and <tt>delete_all</tt> will either # do the deletion according to the strategy specified by the <tt>:dependent</tt> option, or # if no <tt>:dependent</tt> option is given, then it will follow the default strategy. # The default strategy is to do nothing (leave the foreign keys with the parent ids set), except for - # +has_many+ <tt>:through</tt>, where the default strategy is <tt>delete_all</tt> (delete + # #has_many <tt>:through</tt>, where the default strategy is <tt>delete_all</tt> (delete # the join records, without running their callbacks). # # There is also a <tt>clear</tt> method which is the same as <tt>delete_all</tt>, except that @@ -1041,13 +1114,13 @@ module ActiveRecord # # === What gets deleted? # - # There is a potential pitfall here: +has_and_belongs_to_many+ and +has_many+ <tt>:through</tt> + # There is a potential pitfall here: #has_and_belongs_to_many and #has_many <tt>:through</tt> # associations have records in join tables, as well as the associated records. So when we # call one of these deletion methods, what exactly should be deleted? # # The answer is that it is assumed that deletion on an association is about removing the # <i>link</i> between the owner and the associated object(s), rather than necessarily the - # associated objects themselves. So with +has_and_belongs_to_many+ and +has_many+ + # associated objects themselves. So with #has_and_belongs_to_many and #has_many # <tt>:through</tt>, the join records will be deleted, but the associated records won't. # # This makes sense if you think about it: if you were to call <tt>post.tags.delete(Tag.find_by(name: 'food'))</tt> @@ -1058,20 +1131,20 @@ module ActiveRecord # a person has many projects, and each project has many tasks. If we deleted one of a person's # tasks, we would probably not want the project to be deleted. In this scenario, the delete method # won't actually work: it can only be used if the association on the join model is a - # +belongs_to+. In other situations you are expected to perform operations directly on + # #belongs_to. In other situations you are expected to perform operations directly on # either the associated records or the <tt>:through</tt> association. # - # With a regular +has_many+ there is no distinction between the "associated records" + # With a regular #has_many there is no distinction between the "associated records" # and the "link", so there is only one choice for what gets deleted. # - # With +has_and_belongs_to_many+ and +has_many+ <tt>:through</tt>, if you want to delete the + # With #has_and_belongs_to_many and #has_many <tt>:through</tt>, if you want to delete the # associated records themselves, you can always do something along the lines of # <tt>person.tasks.each(&:destroy)</tt>. # - # == Type safety with <tt>ActiveRecord::AssociationTypeMismatch</tt> + # == Type safety with ActiveRecord::AssociationTypeMismatch # # If you attempt to assign an object to an association that doesn't match the inferred - # or specified <tt>:class_name</tt>, you'll get an <tt>ActiveRecord::AssociationTypeMismatch</tt>. + # or specified <tt>:class_name</tt>, you'll get an ActiveRecord::AssociationTypeMismatch. # # == Options # @@ -1091,6 +1164,7 @@ module ActiveRecord # Adds one or more objects to the collection by setting their foreign keys to the collection's primary key. # Note that this operation instantly fires update SQL without waiting for the save or update call on the # parent object, unless the parent object is a new record. + # This will also run validations and callbacks of associated object(s). # [collection.delete(object, ...)] # Removes one or more objects from the collection by setting their foreign keys to +NULL+. # Objects will be in addition destroyed if they're associated with <tt>dependent: :destroy</tt>, @@ -1108,7 +1182,8 @@ module ActiveRecord # [collection=objects] # Replaces the collections content by deleting and adding objects as appropriate. If the <tt>:through</tt> # option is true callbacks in the join models are triggered except destroy callbacks, since deletion is - # direct. + # direct by default. You can specify <tt>dependent: :destroy</tt> or + # <tt>dependent: :nullify</tt> to override this. # [collection_singular_ids] # Returns an array of the associated objects' ids # [collection_singular_ids=ids] @@ -1125,10 +1200,10 @@ module ActiveRecord # [collection.size] # Returns the number of associated objects. # [collection.find(...)] - # Finds an associated object according to the same rules as <tt>ActiveRecord::Base.find</tt>. + # Finds an associated object according to the same rules as ActiveRecord::FinderMethods#find. # [collection.exists?(...)] # Checks whether an associated object with the given conditions exists. - # Uses the same rules as <tt>ActiveRecord::Base.exists?</tt>. + # Uses the same rules as ActiveRecord::FinderMethods#exists?. # [collection.build(attributes = {}, ...)] # Returns one or more new objects of the collection type that have been instantiated # with +attributes+ and linked to this object through a foreign key, but have not yet @@ -1139,7 +1214,7 @@ module ActiveRecord # been saved (if it passed the validation). *Note*: This only works if the base model # already exists in the DB, not if it is a new (unsaved) record! # [collection.create!(attributes = {})] - # Does the same as <tt>collection.create</tt>, but raises <tt>ActiveRecord::RecordInvalid</tt> + # Does the same as <tt>collection.create</tt>, but raises ActiveRecord::RecordInvalid # if the record is invalid. # # === Example @@ -1191,11 +1266,11 @@ module ActiveRecord # [:class_name] # Specify the class name of the association. Use it only if that name can't be inferred # from the association name. So <tt>has_many :products</tt> will by default be linked - # to the Product class, but if the real class name is SpecialProduct, you'll have to + # to the +Product+ class, but if the real class name is +SpecialProduct+, you'll have to # specify it with this option. # [:foreign_key] # Specify the foreign key used for the association. By default this is guessed to be the name - # of this class in lower-case and "_id" suffixed. So a Person class that makes a +has_many+ + # of this class in lower-case and "_id" suffixed. So a Person class that makes a #has_many # association will use "person_id" as the default <tt>:foreign_key</tt>. # [:foreign_type] # Specify the column used to store the associated object's type, if this is a polymorphic @@ -1219,20 +1294,20 @@ module ActiveRecord # * <tt>:restrict_with_error</tt> causes an error to be added to the owner if there are any associated objects. # # If using with the <tt>:through</tt> option, the association on the join model must be - # a +belongs_to+, and the records which get deleted are the join records, rather than + # a #belongs_to, and the records which get deleted are the join records, rather than # the associated records. # [:counter_cache] # This option can be used to configure a custom named <tt>:counter_cache.</tt> You only need this option, - # when you customized the name of your <tt>:counter_cache</tt> on the <tt>belongs_to</tt> association. + # when you customized the name of your <tt>:counter_cache</tt> on the #belongs_to association. # [:as] - # Specifies a polymorphic interface (See <tt>belongs_to</tt>). + # Specifies a polymorphic interface (See #belongs_to). # [:through] # Specifies an association through which to perform the query. This can be any other type # of association, including other <tt>:through</tt> associations. Options for <tt>:class_name</tt>, # <tt>:primary_key</tt> and <tt>:foreign_key</tt> are ignored, as the association uses the # source reflection. # - # If the association on the join model is a +belongs_to+, the collection can be modified + # If the association on the join model is a #belongs_to, the collection can be modified # and the records on the <tt>:through</tt> model will be automatically created and removed # as appropriate. Otherwise, the collection is read-only, so you should manipulate the # <tt>:through</tt> association directly. @@ -1243,13 +1318,13 @@ module ActiveRecord # the appropriate join model records when they are saved. (See the 'Association Join Models' # section above.) # [:source] - # Specifies the source association name used by <tt>has_many :through</tt> queries. + # Specifies the source association name used by #has_many <tt>:through</tt> queries. # Only use it if the name cannot be inferred from the association. # <tt>has_many :subscribers, through: :subscriptions</tt> will look for either <tt>:subscribers</tt> or # <tt>:subscriber</tt> on Subscription, unless a <tt>:source</tt> is given. # [:source_type] - # Specifies type of the source association used by <tt>has_many :through</tt> queries where the source - # association is a polymorphic +belongs_to+. + # Specifies type of the source association used by #has_many <tt>:through</tt> queries where the source + # association is a polymorphic #belongs_to. # [:validate] # If +false+, don't validate the associated objects when saving the parent object. true by default. # [:autosave] @@ -1259,10 +1334,11 @@ module ActiveRecord # +before_save+ callback. Because callbacks are run in the order they are defined, associated objects # may need to be explicitly saved in any user-defined +before_save+ callbacks. # - # Note that <tt>accepts_nested_attributes_for</tt> sets <tt>:autosave</tt> to <tt>true</tt>. + # Note that NestedAttributes::ClassMethods#accepts_nested_attributes_for sets + # <tt>:autosave</tt> to <tt>true</tt>. # [:inverse_of] - # Specifies the name of the <tt>belongs_to</tt> association on the associated object - # that is the inverse of this <tt>has_many</tt> association. Does not work in combination + # Specifies the name of the #belongs_to association on the associated object + # that is the inverse of this #has_many association. Does not work in combination # with <tt>:through</tt> or <tt>:as</tt> options. # See ActiveRecord::Associations::ClassMethods's overview on Bi-directional associations for more detail. # [:extend] @@ -1271,10 +1347,10 @@ module ActiveRecord # association objects. # # Option examples: - # has_many :comments, -> { order "posted_on" } - # has_many :comments, -> { includes :author } + # has_many :comments, -> { order("posted_on") } + # has_many :comments, -> { includes(:author) } # has_many :people, -> { where(deleted: false).order("name") }, class_name: "Person" - # has_many :tracks, -> { order "position" }, dependent: :destroy + # has_many :tracks, -> { order("position") }, dependent: :destroy # has_many :comments, dependent: :nullify # has_many :tags, as: :taggable # has_many :reports, -> { readonly } @@ -1286,8 +1362,8 @@ module ActiveRecord # Specifies a one-to-one association with another class. This method should only be used # if the other class contains the foreign key. If the current class contains the foreign key, - # then you should use +belongs_to+ instead. See also ActiveRecord::Associations::ClassMethods's overview - # on when to use +has_one+ and when to use +belongs_to+. + # then you should use #belongs_to instead. See also ActiveRecord::Associations::ClassMethods's overview + # on when to use #has_one and when to use #belongs_to. # # The following methods for retrieval and query of a single associated object will be added: # @@ -1309,7 +1385,7 @@ module ActiveRecord # with +attributes+, linked to this object through a foreign key, and that # has already been saved (if it passed the validation). # [create_association!(attributes = {})] - # Does the same as <tt>create_association</tt>, but raises <tt>ActiveRecord::RecordInvalid</tt> + # Does the same as <tt>create_association</tt>, but raises ActiveRecord::RecordInvalid # if the record is invalid. # # === Example @@ -1354,7 +1430,7 @@ module ActiveRecord # Note that <tt>:dependent</tt> option is ignored when using <tt>:through</tt> option. # [:foreign_key] # Specify the foreign key used for the association. By default this is guessed to be the name - # of this class in lower-case and "_id" suffixed. So a Person class that makes a +has_one+ association + # of this class in lower-case and "_id" suffixed. So a Person class that makes a #has_one association # will use "person_id" as the default <tt>:foreign_key</tt>. # [:foreign_type] # Specify the column used to store the associated object's type, if this is a polymorphic @@ -1365,20 +1441,20 @@ module ActiveRecord # [:primary_key] # Specify the method that returns the primary key used for the association. By default this is +id+. # [:as] - # Specifies a polymorphic interface (See <tt>belongs_to</tt>). + # Specifies a polymorphic interface (See #belongs_to). # [:through] # Specifies a Join Model through which to perform the query. Options for <tt>:class_name</tt>, # <tt>:primary_key</tt>, and <tt>:foreign_key</tt> are ignored, as the association uses the - # source reflection. You can only use a <tt>:through</tt> query through a <tt>has_one</tt> - # or <tt>belongs_to</tt> association on the join model. + # source reflection. You can only use a <tt>:through</tt> query through a #has_one + # or #belongs_to association on the join model. # [:source] - # Specifies the source association name used by <tt>has_one :through</tt> queries. + # Specifies the source association name used by #has_one <tt>:through</tt> queries. # Only use it if the name cannot be inferred from the association. # <tt>has_one :favorite, through: :favorites</tt> will look for a # <tt>:favorite</tt> on Favorite, unless a <tt>:source</tt> is given. # [:source_type] - # Specifies type of the source association used by <tt>has_one :through</tt> queries where the source - # association is a polymorphic +belongs_to+. + # Specifies type of the source association used by #has_one <tt>:through</tt> queries where the source + # association is a polymorphic #belongs_to. # [:validate] # If +false+, don't validate the associated object when saving the parent object. +false+ by default. # [:autosave] @@ -1386,10 +1462,11 @@ module ActiveRecord # when saving the parent object. If false, never save or destroy the associated object. # By default, only save the associated object if it's a new record. # - # Note that <tt>accepts_nested_attributes_for</tt> sets <tt>:autosave</tt> to <tt>true</tt>. + # Note that NestedAttributes::ClassMethods#accepts_nested_attributes_for sets + # <tt>:autosave</tt> to <tt>true</tt>. # [:inverse_of] - # Specifies the name of the <tt>belongs_to</tt> association on the associated object - # that is the inverse of this <tt>has_one</tt> association. Does not work in combination + # Specifies the name of the #belongs_to association on the associated object + # that is the inverse of this #has_one association. Does not work in combination # with <tt>:through</tt> or <tt>:as</tt> options. # See ActiveRecord::Associations::ClassMethods's overview on Bi-directional associations for more detail. # [:required] @@ -1401,12 +1478,12 @@ module ActiveRecord # has_one :credit_card, dependent: :destroy # destroys the associated credit card # has_one :credit_card, dependent: :nullify # updates the associated records foreign # # key value to NULL rather than destroying it - # has_one :last_comment, -> { order 'posted_on' }, class_name: "Comment" - # has_one :project_manager, -> { where role: 'project_manager' }, class_name: "Person" + # has_one :last_comment, -> { order('posted_on') }, class_name: "Comment" + # has_one :project_manager, -> { where(role: 'project_manager') }, class_name: "Person" # has_one :attachment, as: :attachable # has_one :boss, -> { readonly } # has_one :club, through: :membership - # has_one :primary_address, -> { where primary: true }, through: :addressables, source: :addressable + # has_one :primary_address, -> { where(primary: true) }, through: :addressables, source: :addressable # has_one :credit_card, required: true def has_one(name, scope = nil, options = {}) reflection = Builder::HasOne.build(self, name, scope, options) @@ -1415,8 +1492,8 @@ module ActiveRecord # Specifies a one-to-one association with another class. This method should only be used # if this class contains the foreign key. If the other class contains the foreign key, - # then you should use +has_one+ instead. See also ActiveRecord::Associations::ClassMethods's overview - # on when to use +has_one+ and when to use +belongs_to+. + # then you should use #has_one instead. See also ActiveRecord::Associations::ClassMethods's overview + # on when to use #has_one and when to use #belongs_to. # # Methods will be added for retrieval and query for a single associated object, for which # this object holds an id: @@ -1436,7 +1513,7 @@ module ActiveRecord # with +attributes+, linked to this object through a foreign key, and that # has already been saved (if it passed the validation). # [create_association!(attributes = {})] - # Does the same as <tt>create_association</tt>, but raises <tt>ActiveRecord::RecordInvalid</tt> + # Does the same as <tt>create_association</tt>, but raises ActiveRecord::RecordInvalid # if the record is invalid. # # === Example @@ -1483,12 +1560,12 @@ module ActiveRecord # [:dependent] # If set to <tt>:destroy</tt>, the associated object is destroyed when this object is. If set to # <tt>:delete</tt>, the associated object is deleted *without* calling its destroy method. - # This option should not be specified when <tt>belongs_to</tt> is used in conjunction with - # a <tt>has_many</tt> relationship on another class because of the potential to leave + # This option should not be specified when #belongs_to is used in conjunction with + # a #has_many relationship on another class because of the potential to leave # orphaned records behind. # [:counter_cache] - # Caches the number of belonging objects on the associate class through the use of +increment_counter+ - # and +decrement_counter+. The counter cache is incremented when an object of this + # Caches the number of belonging objects on the associate class through the use of CounterCache::ClassMethods#increment_counter + # and CounterCache::ClassMethods#decrement_counter. The counter cache is incremented when an object of this # class is created and decremented when it's destroyed. This requires that a column # named <tt>#{table_name}_count</tt> (such as +comments_count+ for a belonging Comment class) # is used on the associate class (such as a Post class) - that is the migration for @@ -1510,14 +1587,15 @@ module ActiveRecord # If false, never save or destroy the associated object. # By default, only save the associated object if it's a new record. # - # Note that <tt>accepts_nested_attributes_for</tt> sets <tt>:autosave</tt> to <tt>true</tt>. + # Note that NestedAttributes::ClassMethods#accepts_nested_attributes_for + # sets <tt>:autosave</tt> to <tt>true</tt>. # [:touch] # If true, the associated object will be touched (the updated_at/on attributes set to current time) # when this record is either saved or destroyed. If you specify a symbol, that attribute # will be updated with the current time in addition to the updated_at/on attribute. # [:inverse_of] - # Specifies the name of the <tt>has_one</tt> or <tt>has_many</tt> association on the associated - # object that is the inverse of this <tt>belongs_to</tt> association. Does not work in + # Specifies the name of the #has_one or #has_many association on the associated + # object that is the inverse of this #belongs_to association. Does not work in # combination with the <tt>:polymorphic</tt> options. # See ActiveRecord::Associations::ClassMethods's overview on Bi-directional associations for more detail. # [:optional] @@ -1563,7 +1641,7 @@ module ActiveRecord # The join table should not have a primary key or a model associated with it. You must manually generate the # join table with a migration such as this: # - # class CreateDevelopersProjectsJoinTable < ActiveRecord::Migration + # class CreateDevelopersProjectsJoinTable < ActiveRecord::Migration[5.0] # def change # create_join_table :developers, :projects # end @@ -1607,10 +1685,10 @@ module ActiveRecord # [collection.find(id)] # Finds an associated object responding to the +id+ and that # meets the condition that it has to be associated with this object. - # Uses the same rules as <tt>ActiveRecord::Base.find</tt>. + # Uses the same rules as ActiveRecord::FinderMethods#find. # [collection.exists?(...)] # Checks whether an associated object with the given conditions exists. - # Uses the same rules as <tt>ActiveRecord::Base.exists?</tt>. + # Uses the same rules as ActiveRecord::FinderMethods#exists?. # [collection.build(attributes = {})] # Returns a new object of the collection type that has been instantiated # with +attributes+ and linked to this object through the join table, but has not yet been saved. @@ -1645,7 +1723,7 @@ module ActiveRecord # query when you access the associated collection. # # Scope examples: - # has_and_belongs_to_many :projects, -> { includes :milestones, :manager } + # has_and_belongs_to_many :projects, -> { includes(:milestones, :manager) } # has_and_belongs_to_many :categories, ->(category) { # where("default_category = ?", category.name) # } @@ -1674,19 +1752,17 @@ module ActiveRecord # [:join_table] # Specify the name of the join table if the default based on lexical order isn't what you want. # <b>WARNING:</b> If you're overwriting the table name of either class, the +table_name+ method - # MUST be declared underneath any +has_and_belongs_to_many+ declaration in order to work. + # MUST be declared underneath any #has_and_belongs_to_many declaration in order to work. # [:foreign_key] # Specify the foreign key used for the association. By default this is guessed to be the name # of this class in lower-case and "_id" suffixed. So a Person class that makes - # a +has_and_belongs_to_many+ association to Project will use "person_id" as the + # a #has_and_belongs_to_many association to Project will use "person_id" as the # default <tt>:foreign_key</tt>. # [:association_foreign_key] # Specify the foreign key used for the association on the receiving side of the association. # By default this is guessed to be the name of the associated class in lower-case and "_id" suffixed. - # So if a Person class makes a +has_and_belongs_to_many+ association to Project, + # So if a Person class makes a #has_and_belongs_to_many association to Project, # the association will use "project_id" as the default <tt>:association_foreign_key</tt>. - # [:readonly] - # If true, all the associated objects are readonly through the association. # [:validate] # If +false+, don't validate the associated objects when saving the parent object. +true+ by default. # [:autosave] @@ -1695,11 +1771,12 @@ module ActiveRecord # If false, never save or destroy the associated objects. # By default, only save associated objects that are new records. # - # Note that <tt>accepts_nested_attributes_for</tt> sets <tt>:autosave</tt> to <tt>true</tt>. + # Note that NestedAttributes::ClassMethods#accepts_nested_attributes_for sets + # <tt>:autosave</tt> to <tt>true</tt>. # # Option examples: # has_and_belongs_to_many :projects - # has_and_belongs_to_many :projects, -> { includes :milestones, :manager } + # has_and_belongs_to_many :projects, -> { includes(:milestones, :manager) } # has_and_belongs_to_many :nations, class_name: "Country" # has_and_belongs_to_many :categories, join_table: "prods_cats" # has_and_belongs_to_many :categories, -> { readonly } @@ -1738,7 +1815,7 @@ module ActiveRecord hm_options[:through] = middle_reflection.name hm_options[:source] = join_model.right_reflection.name - [:before_add, :after_add, :before_remove, :after_remove, :autosave, :validate, :join_table, :class_name].each do |k| + [:before_add, :after_add, :before_remove, :after_remove, :autosave, :validate, :join_table, :class_name, :extend].each do |k| hm_options[k] = options[k] if options.key? k end diff --git a/activerecord/lib/active_record/associations/alias_tracker.rb b/activerecord/lib/active_record/associations/alias_tracker.rb index 2b7e4f28c5..021bc32237 100644 --- a/activerecord/lib/active_record/associations/alias_tracker.rb +++ b/activerecord/lib/active_record/associations/alias_tracker.rb @@ -2,8 +2,7 @@ require 'active_support/core_ext/string/conversions' module ActiveRecord module Associations - # Keeps track of table aliases for ActiveRecord::Associations::ClassMethods::JoinDependency and - # ActiveRecord::Associations::ThroughAssociationScope + # Keeps track of table aliases for ActiveRecord::Associations::JoinDependency class AliasTracker # :nodoc: attr_reader :aliases diff --git a/activerecord/lib/active_record/associations/association.rb b/activerecord/lib/active_record/associations/association.rb index 930f678ae8..d64ab64c99 100644 --- a/activerecord/lib/active_record/associations/association.rb +++ b/activerecord/lib/active_record/associations/association.rb @@ -163,9 +163,12 @@ module ActiveRecord @reflection = @owner.class._reflect_on_association(reflection_name) end - def initialize_attributes(record) #:nodoc: + def initialize_attributes(record, except_from_scope_attributes = nil) #:nodoc: + except_from_scope_attributes ||= {} skip_assign = [reflection.foreign_key, reflection.type].compact - attributes = create_scope.except(*(record.changed - skip_assign)) + assigned_keys = record.changed + assigned_keys += except_from_scope_attributes.keys.map(&:to_s) + attributes = create_scope.except(*(assigned_keys - skip_assign)) record.assign_attributes(attributes) set_inverse_instance(record) end @@ -211,9 +214,12 @@ module ActiveRecord # the kind of the class of the associated objects. Meant to be used as # a sanity check when you are about to assign an associated record. def raise_on_type_mismatch!(record) - unless record.is_a?(reflection.klass) || record.is_a?(reflection.class_name.constantize) - message = "#{reflection.class_name}(##{reflection.klass.object_id}) expected, got #{record.class}(##{record.class.object_id})" - raise ActiveRecord::AssociationTypeMismatch, message + unless record.is_a?(reflection.klass) + fresh_class = reflection.class_name.safe_constantize + unless fresh_class && record.is_a?(fresh_class) + message = "#{reflection.class_name}(##{reflection.klass.object_id}) expected, got #{record.class}(##{record.class.object_id})" + raise ActiveRecord::AssociationTypeMismatch, message + end end end @@ -245,9 +251,17 @@ module ActiveRecord def build_record(attributes) reflection.build_association(attributes) do |record| - initialize_attributes(record) + initialize_attributes(record, attributes) end end + + # Returns true if statement cache should be skipped on the association reader. + def skip_statement_cache? + reflection.scope_chain.any?(&:any?) || + scope.eager_loading? || + klass.scope_attributes? || + reflection.source_reflection.active_record.default_scopes.any? + end end end end diff --git a/activerecord/lib/active_record/associations/association_scope.rb b/activerecord/lib/active_record/associations/association_scope.rb index 2416167834..48437a1c9e 100644 --- a/activerecord/lib/active_record/associations/association_scope.rb +++ b/activerecord/lib/active_record/associations/association_scope.rb @@ -147,6 +147,7 @@ module ActiveRecord scope.includes! item.includes_values end + scope.unscope!(*item.unscope_values) scope.where_clause += item.where_clause scope.order_values |= item.order_values end diff --git a/activerecord/lib/active_record/associations/belongs_to_association.rb b/activerecord/lib/active_record/associations/belongs_to_association.rb index 265a65c4c1..41698c5360 100644 --- a/activerecord/lib/active_record/associations/belongs_to_association.rb +++ b/activerecord/lib/active_record/associations/belongs_to_association.rb @@ -10,7 +10,7 @@ module ActiveRecord def replace(record) if record raise_on_type_mismatch!(record) - update_counters(record) + update_counters_on_replace(record) replace_keys(record) set_inverse_instance(record) @updated = true @@ -32,45 +32,37 @@ module ActiveRecord end def decrement_counters # :nodoc: - with_cache_name { |name| decrement_counter name } + update_counters(-1) end def increment_counters # :nodoc: - with_cache_name { |name| increment_counter name } + update_counters(1) end private - def find_target? - !loaded? && foreign_key_present? && klass - end - - def with_cache_name - counter_cache_name = reflection.counter_cache_column - return unless counter_cache_name && owner.persisted? - yield counter_cache_name + def update_counters(by) + if require_counter_update? && foreign_key_present? + if target && !stale_target? + target.increment!(reflection.counter_cache_column, by) + else + klass.update_counters(target_id, reflection.counter_cache_column => by) + end + end end - def update_counters(record) - with_cache_name do |name| - return unless different_target? record - record.class.increment_counter(name, record.id) - decrement_counter name - end + def find_target? + !loaded? && foreign_key_present? && klass end - def decrement_counter(counter_cache_name) - if foreign_key_present? - klass.decrement_counter(counter_cache_name, target_id) - end + def require_counter_update? + reflection.counter_cache_column && owner.persisted? end - def increment_counter(counter_cache_name) - if foreign_key_present? - klass.increment_counter(counter_cache_name, target_id) - if target && !stale_target? - target.increment(counter_cache_name) - end + def update_counters_on_replace(record) + if require_counter_update? && different_target?(record) + record.increment!(reflection.counter_cache_column) + decrement_counters end end @@ -107,7 +99,7 @@ module ActiveRecord end def stale_state - result = owner._read_attribute(reflection.foreign_key) + result = owner._read_attribute(reflection.foreign_key) { |n| owner.send(:missing_attribute, n, caller) } result && result.to_s end end diff --git a/activerecord/lib/active_record/associations/builder/association.rb b/activerecord/lib/active_record/associations/builder/association.rb index ba1b1814d1..d0534056d9 100644 --- a/activerecord/lib/active_record/associations/builder/association.rb +++ b/activerecord/lib/active_record/associations/builder/association.rb @@ -9,7 +9,7 @@ # - CollectionAssociation # - HasManyAssociation -module ActiveRecord::Associations::Builder +module ActiveRecord::Associations::Builder # :nodoc: class Association #:nodoc: class << self attr_accessor :extensions diff --git a/activerecord/lib/active_record/associations/builder/belongs_to.rb b/activerecord/lib/active_record/associations/builder/belongs_to.rb index 97eb007f62..f02d146e89 100644 --- a/activerecord/lib/active_record/associations/builder/belongs_to.rb +++ b/activerecord/lib/active_record/associations/builder/belongs_to.rb @@ -1,4 +1,4 @@ -module ActiveRecord::Associations::Builder +module ActiveRecord::Associations::Builder # :nodoc: class BelongsTo < SingularAssociation #:nodoc: def self.macro :belongs_to @@ -33,16 +33,24 @@ module ActiveRecord::Associations::Builder if (@_after_create_counter_called ||= false) @_after_create_counter_called = false - elsif attribute_changed?(foreign_key) && !new_record? && reflection.constructable? - model = reflection.klass + elsif attribute_changed?(foreign_key) && !new_record? + if reflection.polymorphic? + model = attribute(reflection.foreign_type).try(:constantize) + model_was = attribute_was(reflection.foreign_type).try(:constantize) + else + model = reflection.klass + model_was = reflection.klass + end + foreign_key_was = attribute_was foreign_key foreign_key = attribute foreign_key if foreign_key && model.respond_to?(:increment_counter) model.increment_counter(cache_column, foreign_key) end - if foreign_key_was && model.respond_to?(:decrement_counter) - model.decrement_counter(cache_column, foreign_key_was) + + if foreign_key_was && model_was.respond_to?(:decrement_counter) + model_was.decrement_counter(cache_column, foreign_key_was) end end end @@ -98,8 +106,7 @@ module ActiveRecord::Associations::Builder touch = reflection.options[:touch] callback = lambda { |record| - touch_method = touching_delayed_records? ? :touch : :touch_later - BelongsTo.touch_record(record, foreign_key, n, touch, touch_method) + BelongsTo.touch_record(record, foreign_key, n, touch, belongs_to_touch_method) } model.after_save callback, if: :changed? @@ -108,8 +115,7 @@ module ActiveRecord::Associations::Builder end def self.add_destroy_callbacks(model, reflection) - name = reflection.name - model.after_destroy lambda { |o| o.association(name).handle_dependency } + model.after_destroy lambda { |o| o.association(reflection.name).handle_dependency } end def self.define_validations(model, reflection) diff --git a/activerecord/lib/active_record/associations/builder/collection_association.rb b/activerecord/lib/active_record/associations/builder/collection_association.rb index 2ff67f904d..56a8dc4e18 100644 --- a/activerecord/lib/active_record/associations/builder/collection_association.rb +++ b/activerecord/lib/active_record/associations/builder/collection_association.rb @@ -2,7 +2,7 @@ require 'active_record/associations' -module ActiveRecord::Associations::Builder +module ActiveRecord::Associations::Builder # :nodoc: class CollectionAssociation < Association #:nodoc: CALLBACKS = [:before_add, :after_add, :before_remove, :after_remove] diff --git a/activerecord/lib/active_record/associations/builder/has_and_belongs_to_many.rb b/activerecord/lib/active_record/associations/builder/has_and_belongs_to_many.rb index ffd9c9d6fc..b888148841 100644 --- a/activerecord/lib/active_record/associations/builder/has_and_belongs_to_many.rb +++ b/activerecord/lib/active_record/associations/builder/has_and_belongs_to_many.rb @@ -1,9 +1,9 @@ -module ActiveRecord::Associations::Builder +module ActiveRecord::Associations::Builder # :nodoc: class HasAndBelongsToMany # :nodoc: - class JoinTableResolver + class JoinTableResolver # :nodoc: KnownTable = Struct.new :join_table - class KnownClass + class KnownClass # :nodoc: def initialize(lhs_class, rhs_class_name) @lhs_class = lhs_class @rhs_class_name = rhs_class_name @@ -46,7 +46,7 @@ module ActiveRecord::Associations::Builder join_model = Class.new(ActiveRecord::Base) { class << self; - attr_accessor :class_resolver + attr_accessor :left_model attr_accessor :name attr_accessor :table_name_resolver attr_accessor :left_reflection @@ -58,25 +58,29 @@ module ActiveRecord::Associations::Builder end def self.compute_type(class_name) - class_resolver.compute_type class_name + left_model.compute_type class_name end def self.add_left_association(name, options) - belongs_to name, options + belongs_to name, required: false, **options self.left_reflection = _reflect_on_association(name) end def self.add_right_association(name, options) rhs_name = name.to_s.singularize.to_sym - belongs_to rhs_name, options + belongs_to rhs_name, required: false, **options self.right_reflection = _reflect_on_association(rhs_name) end + def self.retrieve_connection + left_model.retrieve_connection + end + } join_model.name = "HABTM_#{association_name.to_s.camelize}" join_model.table_name_resolver = habtm - join_model.class_resolver = lhs_model + join_model.left_model = lhs_model join_model.add_left_association :left_side, anonymous_class: lhs_model join_model.add_right_association association_name, belongs_to_options(options) diff --git a/activerecord/lib/active_record/associations/builder/has_many.rb b/activerecord/lib/active_record/associations/builder/has_many.rb index 1c1b47bd56..7864d4c536 100644 --- a/activerecord/lib/active_record/associations/builder/has_many.rb +++ b/activerecord/lib/active_record/associations/builder/has_many.rb @@ -1,11 +1,11 @@ -module ActiveRecord::Associations::Builder +module ActiveRecord::Associations::Builder # :nodoc: class HasMany < CollectionAssociation #:nodoc: def self.macro :has_many end def self.valid_options(options) - super + [:primary_key, :dependent, :as, :through, :source, :source_type, :inverse_of, :counter_cache, :join_table, :foreign_type] + super + [:primary_key, :dependent, :as, :through, :source, :source_type, :inverse_of, :counter_cache, :join_table, :foreign_type, :index_errors] end def self.valid_dependent_options diff --git a/activerecord/lib/active_record/associations/builder/has_one.rb b/activerecord/lib/active_record/associations/builder/has_one.rb index a272d3c781..9d64ae877b 100644 --- a/activerecord/lib/active_record/associations/builder/has_one.rb +++ b/activerecord/lib/active_record/associations/builder/has_one.rb @@ -1,4 +1,4 @@ -module ActiveRecord::Associations::Builder +module ActiveRecord::Associations::Builder # :nodoc: class HasOne < SingularAssociation #:nodoc: def self.macro :has_one diff --git a/activerecord/lib/active_record/associations/builder/singular_association.rb b/activerecord/lib/active_record/associations/builder/singular_association.rb index 42542f188e..58a9c8ff24 100644 --- a/activerecord/lib/active_record/associations/builder/singular_association.rb +++ b/activerecord/lib/active_record/associations/builder/singular_association.rb @@ -1,6 +1,6 @@ # This class is inherited by the has_one and belongs_to association classes -module ActiveRecord::Associations::Builder +module ActiveRecord::Associations::Builder # :nodoc: class SingularAssociation < Association #:nodoc: def self.valid_options(options) super + [:dependent, :primary_key, :inverse_of, :required] diff --git a/activerecord/lib/active_record/associations/collection_association.rb b/activerecord/lib/active_record/associations/collection_association.rb index 6caadb4ce8..473b80a658 100644 --- a/activerecord/lib/active_record/associations/collection_association.rb +++ b/activerecord/lib/active_record/associations/collection_association.rb @@ -28,6 +28,12 @@ module ActiveRecord # Implements the reader method, e.g. foo.items for Foo.has_many :items def reader(force_reload = false) if force_reload + ActiveSupport::Deprecation.warn(<<-MSG.squish) + Passing an argument to force an association to reload is now + deprecated and will be removed in Rails 5.1. Please call `reload` + on the result collection proxy instead. + MSG + klass.uncached { reload } elsif stale_target? reload @@ -54,8 +60,10 @@ module ActiveRecord record.send(reflection.association_primary_key) end else - column = "#{reflection.quoted_table_name}.#{reflection.association_primary_key}" - scope.pluck(column) + @association_ids ||= ( + column = "#{reflection.quoted_table_name}.#{reflection.association_primary_key}" + scope.pluck(column) + ) end end @@ -406,12 +414,16 @@ module ActiveRecord def replace_on_target(record, index, skip_callbacks) callback(:before_add, record) unless skip_callbacks + + was_loaded = loaded? yield(record) if block_given? - if index - @target[index] = record - else - @target << record + unless !was_loaded && loaded? + if index + @target[index] = record + else + @target << record + end end callback(:after_add, record) unless skip_callbacks @@ -432,12 +444,7 @@ module ActiveRecord private def get_records - if reflection.scope_chain.any?(&:any?) || - scope.eager_loading? || - klass.scope_attributes? - - return scope.to_a - end + return scope.to_a if skip_statement_cache? conn = klass.connection sc = reflection.association_scope_cache(conn, owner) do diff --git a/activerecord/lib/active_record/associations/collection_proxy.rb b/activerecord/lib/active_record/associations/collection_proxy.rb index 685c3a5f17..fe693cfbb6 100644 --- a/activerecord/lib/active_record/associations/collection_proxy.rb +++ b/activerecord/lib/active_record/associations/collection_proxy.rb @@ -112,7 +112,7 @@ module ActiveRecord end # Finds an object in the collection responding to the +id+. Uses the same - # rules as <tt>ActiveRecord::Base.find</tt>. Returns <tt>ActiveRecord::RecordNotFound</tt> + # rules as ActiveRecord::Base.find. Returns ActiveRecord::RecordNotFound # error if the object cannot be found. # # class Person < ActiveRecord::Base @@ -127,7 +127,7 @@ module ActiveRecord # # ] # # person.pets.find(1) # => #<Pet id: 1, name: "Fancy-Fancy", person_id: 1> - # person.pets.find(4) # => ActiveRecord::RecordNotFound: Couldn't find Pet with id=4 + # person.pets.find(4) # => ActiveRecord::RecordNotFound: Couldn't find Pet with 'id'=4 # # person.pets.find(2) { |pet| pet.name.downcase! } # # => #<Pet id: 2, name: "fancy-fancy", person_id: 1> @@ -171,27 +171,27 @@ module ActiveRecord @association.first(*args) end - # Same as +first+ except returns only the second record. + # Same as #first except returns only the second record. def second(*args) @association.second(*args) end - # Same as +first+ except returns only the third record. + # Same as #first except returns only the third record. def third(*args) @association.third(*args) end - # Same as +first+ except returns only the fourth record. + # Same as #first except returns only the fourth record. def fourth(*args) @association.fourth(*args) end - # Same as +first+ except returns only the fifth record. + # Same as #first except returns only the fifth record. def fifth(*args) @association.fifth(*args) end - # Same as +first+ except returns only the forty second record. + # Same as #first except returns only the forty second record. # Also known as accessing "the reddit". def forty_two(*args) @association.forty_two(*args) @@ -227,6 +227,31 @@ module ActiveRecord @association.last(*args) end + # Gives a record (or N records if a parameter is supplied) from the collection + # using the same rules as <tt>ActiveRecord::Base.take</tt>. + # + # class Person < ActiveRecord::Base + # has_many :pets + # end + # + # person.pets + # # => [ + # # #<Pet id: 1, name: "Fancy-Fancy", person_id: 1>, + # # #<Pet id: 2, name: "Spook", person_id: 1>, + # # #<Pet id: 3, name: "Choo-Choo", person_id: 1> + # # ] + # + # person.pets.take # => #<Pet id: 1, name: "Fancy-Fancy", person_id: 1> + # + # person.pets.take(2) + # # => [ + # # #<Pet id: 1, name: "Fancy-Fancy", person_id: 1>, + # # #<Pet id: 2, name: "Spook", person_id: 1> + # # ] + # + # another_person_without.pets # => [] + # another_person_without.pets.take # => nil + # another_person_without.pets.take(2) # => [] def take(n = nil) @association.take(n) end @@ -290,7 +315,7 @@ module ActiveRecord @association.create(attributes, &block) end - # Like +create+, except that if the record is invalid, raises an exception. + # Like #create, except that if the record is invalid, raises an exception. # # class Person # has_many :pets @@ -307,8 +332,8 @@ module ActiveRecord end # Add one or more records to the collection by setting their foreign keys - # to the association's primary key. Since << flattens its argument list and - # inserts each record, +push+ and +concat+ behave identically. Returns +self+ + # to the association's primary key. Since #<< flattens its argument list and + # inserts each record, +push+ and #concat behave identically. Returns +self+ # so method calls may be chained. # # class Person < ActiveRecord::Base @@ -364,7 +389,7 @@ module ActiveRecord # specified by the +:dependent+ option. If no +:dependent+ option is given, # then it will follow the default strategy. # - # For +has_many :through+ associations, the default deletion strategy is + # For <tt>has_many :through</tt> associations, the default deletion strategy is # +:delete_all+. # # For +has_many+ associations, the default deletion strategy is +:nullify+. @@ -399,7 +424,7 @@ module ActiveRecord # # #<Pet id: 3, name: "Choo-Choo", person_id: nil> # # ] # - # Both +has_many+ and +has_many :through+ dependencies default to the + # Both +has_many+ and <tt>has_many :through</tt> dependencies default to the # +:delete_all+ strategy if the +:dependent+ option is set to +:destroy+. # Records are not instantiated and callbacks will not be fired. # @@ -418,7 +443,7 @@ module ActiveRecord # person.pets.delete_all # # Pet.find(1, 2, 3) - # # => ActiveRecord::RecordNotFound + # # => ActiveRecord::RecordNotFound: Couldn't find all Pets with 'id': (1, 2, 3) # # If it is set to <tt>:delete_all</tt>, all the objects are deleted # *without* calling their +destroy+ method. @@ -438,7 +463,7 @@ module ActiveRecord # person.pets.delete_all # # Pet.find(1, 2, 3) - # # => ActiveRecord::RecordNotFound + # # => ActiveRecord::RecordNotFound: Couldn't find all Pets with 'id': (1, 2, 3) def delete_all(dependent = nil) @association.delete_all(dependent) end @@ -470,15 +495,16 @@ module ActiveRecord @association.destroy_all end - # Deletes the +records+ supplied and removes them from the collection. For - # +has_many+ associations, the deletion is done according to the strategy - # specified by the <tt>:dependent</tt> option. Returns an array with the + # Deletes the +records+ supplied from the collection according to the strategy + # specified by the +:dependent+ option. If no +:dependent+ option is given, + # then it will follow the default strategy. Returns an array with the # deleted records. # - # If no <tt>:dependent</tt> option is given, then it will follow the default - # strategy. The default strategy is <tt>:nullify</tt>. This sets the foreign - # keys to <tt>NULL</tt>. For, +has_many+ <tt>:through</tt>, the default - # strategy is +delete_all+. + # For <tt>has_many :through</tt> associations, the default deletion strategy is + # +:delete_all+. + # + # For +has_many+ associations, the default deletion strategy is +:nullify+. + # This sets the foreign keys to +NULL+. # # class Person < ActiveRecord::Base # has_many :pets # dependent: :nullify option by default @@ -531,7 +557,7 @@ module ActiveRecord # # => [#<Pet id: 2, name: "Spook", person_id: 1>] # # Pet.find(1, 3) - # # => ActiveRecord::RecordNotFound: Couldn't find all Pets with IDs (1, 3) + # # => ActiveRecord::RecordNotFound: Couldn't find all Pets with 'id': (1, 3) # # If it is set to <tt>:delete_all</tt>, all the +records+ are deleted # *without* calling their +destroy+ method. @@ -559,7 +585,7 @@ module ActiveRecord # # ] # # Pet.find(1) - # # => ActiveRecord::RecordNotFound: Couldn't find Pet with id=1 + # # => ActiveRecord::RecordNotFound: Couldn't find Pet with 'id'=1 # # You can pass +Fixnum+ or +String+ values, it finds the records # responding to the +id+ and executes delete on them. @@ -623,7 +649,7 @@ module ActiveRecord # person.pets.size # => 0 # person.pets # => [] # - # Pet.find(1, 2, 3) # => ActiveRecord::RecordNotFound: Couldn't find all Pets with IDs (1, 2, 3) + # Pet.find(1, 2, 3) # => ActiveRecord::RecordNotFound: Couldn't find all Pets with 'id': (1, 2, 3) # # You can pass +Fixnum+ or +String+ values, it finds the records # responding to the +id+ and then deletes them from the database. @@ -655,7 +681,7 @@ module ActiveRecord # person.pets.size # => 0 # person.pets # => [] # - # Pet.find(4, 5, 6) # => ActiveRecord::RecordNotFound: Couldn't find all Pets with IDs (4, 5, 6) + # Pet.find(4, 5, 6) # => ActiveRecord::RecordNotFound: Couldn't find all Pets with 'id': (4, 5, 6) def destroy(*records) @association.destroy(*records) end @@ -780,7 +806,7 @@ module ActiveRecord # person.pets.any? # => false # # person.pets << Pet.new(name: 'Snoop') - # person.pets.count # => 0 + # person.pets.count # => 1 # person.pets.any? # => true # # You can also pass a +block+ to define criteria. The behavior @@ -855,7 +881,7 @@ module ActiveRecord !!@association.include?(record) end - def arel + def arel #:nodoc: scope.arel end @@ -970,7 +996,7 @@ module ActiveRecord alias_method :append, :<< def prepend(*args) - raise NoMethodError, "prepend on association is not defined. Please use << or append" + raise NoMethodError, "prepend on association is not defined. Please use <<, push or append" end # Equivalent to +delete_all+. The difference is that returns +self+, instead diff --git a/activerecord/lib/active_record/associations/foreign_association.rb b/activerecord/lib/active_record/associations/foreign_association.rb index fe48ecec29..3ceec0ee46 100644 --- a/activerecord/lib/active_record/associations/foreign_association.rb +++ b/activerecord/lib/active_record/associations/foreign_association.rb @@ -1,5 +1,5 @@ module ActiveRecord::Associations - module ForeignAssociation + module ForeignAssociation # :nodoc: def foreign_key_present? if reflection.klass.primary_key owner.attribute_present?(reflection.active_record_primary_key) diff --git a/activerecord/lib/active_record/associations/has_many_association.rb b/activerecord/lib/active_record/associations/has_many_association.rb index ca27c9fdde..a9f6aaafef 100644 --- a/activerecord/lib/active_record/associations/has_many_association.rb +++ b/activerecord/lib/active_record/associations/has_many_association.rb @@ -15,8 +15,15 @@ module ActiveRecord when :restrict_with_error unless empty? - record = klass.human_attribute_name(reflection.name).downcase - owner.errors.add(:base, :"restrict_dependent_destroy.many", record: record) + record = owner.class.human_attribute_name(reflection.name).downcase + message = owner.errors.generate_message(:base, :'restrict_dependent_destroy.many', record: record, raise: true) rescue nil + if message + ActiveSupport::Deprecation.warn(<<-MESSAGE.squish) + The error key `:'restrict_dependent_destroy.many'` has been deprecated and will be removed in Rails 5.1. + Please use `:'restrict_dependent_destroy.has_many'` instead. + MESSAGE + end + owner.errors.add(:base, message || :'restrict_dependent_destroy.has_many', record: record) throw(:abort) end @@ -43,7 +50,7 @@ module ActiveRecord end def empty? - if has_cached_counter? + if reflection.has_cached_counter? size.zero? else super @@ -66,8 +73,8 @@ module ActiveRecord # If the collection is empty the target is set to an empty array and # the loaded flag is set to true as well. def count_records - count = if has_cached_counter? - owner._read_attribute cached_counter_attribute_name + count = if reflection.has_cached_counter? + owner._read_attribute reflection.counter_cache_column else scope.count end @@ -80,70 +87,20 @@ module ActiveRecord [association_scope.limit_value, count].compact.min end - def has_cached_counter?(reflection = reflection()) - owner.attribute_present?(cached_counter_attribute_name(reflection)) - end - - def cached_counter_attribute_name(reflection = reflection()) - if reflection.options[:counter_cache] - reflection.options[:counter_cache].to_s - else - "#{reflection.name}_count" - end - end - def update_counter(difference, reflection = reflection()) - update_counter_in_database(difference, reflection) - update_counter_in_memory(difference, reflection) - end - - def update_counter_in_database(difference, reflection = reflection()) - if has_cached_counter?(reflection) - counter = cached_counter_attribute_name(reflection) - owner.class.update_counters(owner.id, counter => difference) + if reflection.has_cached_counter? + owner.increment!(reflection.counter_cache_column, difference) end end def update_counter_in_memory(difference, reflection = reflection()) - if counter_must_be_updated_by_has_many?(reflection) - counter = cached_counter_attribute_name(reflection) - owner[counter] += difference - owner.send(:clear_attribute_changes, counter) # eww + if reflection.counter_must_be_updated_by_has_many? + counter = reflection.counter_cache_column + owner.increment(counter, difference) + owner.send(:clear_attribute_change, counter) # eww end end - # This shit is nasty. We need to avoid the following situation: - # - # * An associated record is deleted via record.destroy - # * Hence the callbacks run, and they find a belongs_to on the record with a - # :counter_cache options which points back at our owner. So they update the - # counter cache. - # * In which case, we must make sure to *not* update the counter cache, or else - # it will be decremented twice. - # - # Hence this method. - def inverse_which_updates_counter_cache(reflection = reflection()) - counter_name = cached_counter_attribute_name(reflection) - inverse_which_updates_counter_named(counter_name, reflection) - end - alias inverse_updates_counter_cache? inverse_which_updates_counter_cache - - def inverse_which_updates_counter_named(counter_name, reflection) - reflection.klass._reflections.values.find { |inverse_reflection| - inverse_reflection.belongs_to? && - inverse_reflection.counter_cache_column == counter_name - } - end - - def inverse_updates_counter_in_memory?(reflection) - inverse = inverse_which_updates_counter_cache(reflection) - inverse && inverse == reflection.inverse_of - end - - def counter_must_be_updated_by_has_many?(reflection) - !inverse_updates_counter_in_memory?(reflection) && has_cached_counter?(reflection) - end - def delete_count(method, scope) if method == :delete_all scope.delete_all @@ -161,7 +118,7 @@ module ActiveRecord def delete_records(records, method) if method == :destroy records.each(&:destroy!) - update_counter(-records.length) unless inverse_updates_counter_cache? + update_counter(-records.length) unless reflection.inverse_updates_counter_cache? else scope = self.scope.where(reflection.klass.primary_key => records) update_counter(-delete_count(method, scope)) diff --git a/activerecord/lib/active_record/associations/has_many_through_association.rb b/activerecord/lib/active_record/associations/has_many_through_association.rb index cd79266952..deb0f8c9f5 100644 --- a/activerecord/lib/active_record/associations/has_many_through_association.rb +++ b/activerecord/lib/active_record/associations/has_many_through_association.rb @@ -110,7 +110,7 @@ module ActiveRecord def update_through_counter?(method) case method when :destroy - !inverse_updates_counter_cache?(through_reflection) + !through_reflection.inverse_updates_counter_cache? when :nullify false else @@ -133,7 +133,7 @@ module ActiveRecord if scope.klass.primary_key count = scope.destroy_all.length else - scope.each { |record| record.run_callbacks :destroy } + scope.each(&:_run_destroy_callbacks) arel = scope.arel diff --git a/activerecord/lib/active_record/associations/has_one_association.rb b/activerecord/lib/active_record/associations/has_one_association.rb index 41a75b820e..0fe9b2e81b 100644 --- a/activerecord/lib/active_record/associations/has_one_association.rb +++ b/activerecord/lib/active_record/associations/has_one_association.rb @@ -1,5 +1,5 @@ module ActiveRecord - # = Active Record Belongs To Has One Association + # = Active Record Has One Association module Associations class HasOneAssociation < SingularAssociation #:nodoc: include ForeignAssociation @@ -11,8 +11,15 @@ module ActiveRecord when :restrict_with_error if load_target - record = klass.human_attribute_name(reflection.name).downcase - owner.errors.add(:base, :"restrict_dependent_destroy.one", record: record) + record = owner.class.human_attribute_name(reflection.name).downcase + message = owner.errors.generate_message(:base, :'restrict_dependent_destroy.one', record: record, raise: true) rescue nil + if message + ActiveSupport::Deprecation.warn(<<-MESSAGE.squish) + The error key `:'restrict_dependent_destroy.one'` has been deprecated and will be removed in Rails 5.1. + Please use `:'restrict_dependent_destroy.has_one'` instead. + MESSAGE + end + owner.errors.add(:base, message || :'restrict_dependent_destroy.has_one', record: record) throw(:abort) end @@ -58,7 +65,7 @@ module ActiveRecord when :destroy target.destroy when :nullify - target.update_columns(reflection.foreign_key => nil) + target.update_columns(reflection.foreign_key => nil) if target.persisted? end end end diff --git a/activerecord/lib/active_record/associations/join_dependency.rb b/activerecord/lib/active_record/associations/join_dependency.rb index 81eb5136a1..0e4e951269 100644 --- a/activerecord/lib/active_record/associations/join_dependency.rb +++ b/activerecord/lib/active_record/associations/join_dependency.rb @@ -32,7 +32,7 @@ module ActiveRecord @alias_cache[node][column] end - class Table < Struct.new(:node, :columns) + class Table < Struct.new(:node, :columns) # :nodoc: def table Arel::Nodes::TableAlias.new node.table, node.aliased_table_name end @@ -103,9 +103,14 @@ module ActiveRecord join_root.drop(1).map!(&:reflection) end - def join_constraints(outer_joins) + def join_constraints(outer_joins, join_type) joins = join_root.children.flat_map { |child| - make_inner_joins join_root, child + + if join_type == Arel::Nodes::OuterJoin + make_left_outer_joins join_root, child + else + make_inner_joins join_root, child + end } joins.concat outer_joins.flat_map { |oj| @@ -131,9 +136,9 @@ module ActiveRecord def instantiate(result_set, aliases) primary_key = aliases.column_alias(join_root, join_root.primary_key) - seen = Hash.new { |h,parent_klass| - h[parent_klass] = Hash.new { |i,parent_id| - i[parent_id] = Hash.new { |j,child_klass| j[child_klass] = {} } + seen = Hash.new { |i, object_id| + i[object_id] = Hash.new { |j, child_class| + j[child_class] = {} } } @@ -150,7 +155,8 @@ module ActiveRecord message_bus.instrument('instantiation.active_record', payload) do result_set.each { |row_hash| - parent = parents[row_hash[primary_key]] ||= join_root.instantiate(row_hash, column_aliases) + parent_key = primary_key ? row_hash[primary_key] : row_hash + parent = parents[parent_key] ||= join_root.instantiate(row_hash, column_aliases) construct(parent, join_root, row_hash, result_set, seen, model_cache, aliases) } end @@ -175,6 +181,14 @@ module ActiveRecord [info] + child.children.flat_map { |c| make_outer_joins(child, c) } end + def make_left_outer_joins(parent, child) + tables = child.tables + join_type = Arel::Nodes::OuterJoin + info = make_constraints parent, child, tables, join_type + + [info] + child.children.flat_map { |c| make_left_outer_joins(child, c) } + end + def make_inner_joins(parent, child) tables = child.tables join_type = Arel::Nodes::InnerJoin @@ -233,7 +247,6 @@ module ActiveRecord def construct(ar_parent, parent, row, rs, seen, model_cache, aliases) return if ar_parent.nil? - primary_id = ar_parent.id parent.children.each do |node| if node.reflection.collection? @@ -253,14 +266,14 @@ module ActiveRecord next end - model = seen[parent.base_klass][primary_id][node.base_klass][id] + model = seen[ar_parent.object_id][node.base_klass][id] if model construct(model, node, row, rs, seen, model_cache, aliases) else model = construct_model(ar_parent, node, row, model_cache, id, aliases) model.readonly! - seen[parent.base_klass][primary_id][node.base_klass][id] = model + seen[ar_parent.object_id][node.base_klass][id] = model construct(model, node, row, rs, seen, model_cache, aliases) end end diff --git a/activerecord/lib/active_record/associations/join_dependency/join_association.rb b/activerecord/lib/active_record/associations/join_dependency/join_association.rb index a6ad09a38a..be65cf318c 100644 --- a/activerecord/lib/active_record/associations/join_dependency/join_association.rb +++ b/activerecord/lib/active_record/associations/join_dependency/join_association.rb @@ -74,9 +74,8 @@ module ActiveRecord value = foreign_klass.base_class.name column = klass.columns_hash[reflection.type.to_s] - substitute = klass.connection.substitute_at(column) binds << Relation::QueryAttribute.new(column.name, value, klass.type_for_attribute(column.name)) - constraint = constraint.and table[reflection.type].eq substitute + constraint = constraint.and table[reflection.type].eq(Arel::Nodes::BindParam.new) end joins << table.create_join(table, table.create_on(constraint), join_type) diff --git a/activerecord/lib/active_record/associations/preloader.rb b/activerecord/lib/active_record/associations/preloader.rb index 97f4bd3811..ecf6fb8643 100644 --- a/activerecord/lib/active_record/associations/preloader.rb +++ b/activerecord/lib/active_record/associations/preloader.rb @@ -10,13 +10,13 @@ module ActiveRecord # end # # class Book < ActiveRecord::Base - # # columns: title, sales + # # columns: title, sales, author_id # end # # When you load an author with all associated books Active Record will make # multiple queries like this: # - # Author.includes(:books).where(:name => ['bell hooks', 'Homer').to_a + # Author.includes(:books).where(name: ['bell hooks', 'Homer']).to_a # # => SELECT `authors`.* FROM `authors` WHERE `name` IN ('bell hooks', 'Homer') # => SELECT `books`.* FROM `books` WHERE `author_id` IN (2, 5) @@ -54,6 +54,8 @@ module ActiveRecord autoload :BelongsTo, 'active_record/associations/preloader/belongs_to' end + NULL_RELATION = Struct.new(:values, :where_clause, :joins_values).new({}, Relation::WhereClause.empty, []) + # Eager loads the named associations for the given Active Record record(s). # # In this description, 'association name' shall refer to the name passed @@ -88,9 +90,6 @@ module ActiveRecord # [ :books, :author ] # { author: :avatar } # [ :books, { author: :avatar } ] - - NULL_RELATION = Struct.new(:values, :where_clause, :joins_values).new({}, Relation::WhereClause.empty, []) - def preload(records, associations, preload_scope = nil) records = Array.wrap(records).compact.uniq associations = Array.wrap(associations) @@ -107,6 +106,7 @@ module ActiveRecord private + # Loads all the given data into +records+ for the +association+. def preloaders_on(association, records, scope) case association when Hash @@ -116,7 +116,7 @@ module ActiveRecord when String preloaders_for_one(association.to_sym, records, scope) else - raise ArgumentError, "#{association.inspect} was not recognised for preload" + raise ArgumentError, "#{association.inspect} was not recognized for preload" end end @@ -132,6 +132,11 @@ module ActiveRecord } end + # Loads all the given data into +records+ for a singular +association+. + # + # Functions by instantiating a preloader class such as Preloader::HasManyThrough and + # call the +run+ method for each passed in class in the +records+ argument. + # # Not all records have the same class, so group then preload group on the reflection # itself so that if various subclass share the same association then we do not split # them unnecessarily @@ -160,7 +165,7 @@ module ActiveRecord h end - class AlreadyLoaded + class AlreadyLoaded # :nodoc: attr_reader :owners, :reflection def initialize(klass, owners, reflection, preload_scope) @@ -175,12 +180,16 @@ module ActiveRecord end end - class NullPreloader + class NullPreloader # :nodoc: def self.new(klass, owners, reflection, preload_scope); self; end def self.run(preloader); end def self.preloaded_records; []; end end + # Returns a class containing the logic needed to load preload the data + # and attach it to a relation. For example +Preloader::Association+ or + # +Preloader::HasManyThrough+. The class returned implements a `run` method + # that accepts a preloader. def preloader_for(reflection, owners, rhs_klass) return NullPreloader unless rhs_klass diff --git a/activerecord/lib/active_record/associations/preloader/association.rb b/activerecord/lib/active_record/associations/preloader/association.rb index 1dc8bff193..e11a5cfb8a 100644 --- a/activerecord/lib/active_record/associations/preloader/association.rb +++ b/activerecord/lib/active_record/associations/preloader/association.rb @@ -12,7 +12,6 @@ module ActiveRecord @preload_scope = preload_scope @model = owners.first && owners.first.class @scope = nil - @owners_by_key = nil @preloaded_records = [] end @@ -56,18 +55,6 @@ module ActiveRecord raise NotImplementedError end - def owners_by_key - @owners_by_key ||= if key_conversion_required? - owners.group_by do |owner| - owner[owner_key_name].to_s - end - else - owners.group_by do |owner| - owner[owner_key_name] - end - end - end - def options reflection.options end @@ -75,32 +62,33 @@ module ActiveRecord private def associated_records_by_owner(preloader) - owners_map = owners_by_key - owner_keys = owners_map.keys.compact - - # Each record may have multiple owners, and vice-versa - records_by_owner = owners.each_with_object({}) do |owner,h| - h[owner] = [] + records = load_records + owners.each_with_object({}) do |owner, result| + result[owner] = records[convert_key(owner[owner_key_name])] || [] end + end - if owner_keys.any? - # Some databases impose a limit on the number of ids in a list (in Oracle it's 1000) - # Make several smaller queries if necessary or make one query if the adapter supports it - sliced = owner_keys.each_slice(klass.connection.in_clause_length || owner_keys.size) - - records = load_slices sliced - records.each do |record, owner_key| - owners_map[owner_key].each do |owner| - records_by_owner[owner] << record - end + def owner_keys + unless defined?(@owner_keys) + @owner_keys = owners.map do |owner| + owner[owner_key_name] end + @owner_keys.uniq! + @owner_keys.compact! end - - records_by_owner + @owner_keys end def key_conversion_required? - association_key_type != owner_key_type + @key_conversion_required ||= association_key_type != owner_key_type + end + + def convert_key(key) + if key_conversion_required? + key.to_s + else + key + end end def association_key_type @@ -111,17 +99,17 @@ module ActiveRecord @model.type_for_attribute(owner_key_name.to_s).type end - def load_slices(slices) - @preloaded_records = slices.flat_map { |slice| + def load_records + return {} if owner_keys.empty? + # Some databases impose a limit on the number of ids in a list (in Oracle it's 1000) + # Make several smaller queries if necessary or make one query if the adapter supports it + slices = owner_keys.each_slice(klass.connection.in_clause_length || owner_keys.size) + @preloaded_records = slices.flat_map do |slice| records_for(slice) - } - - @preloaded_records.map { |record| - key = record[association_key_name] - key = key.to_s if key_conversion_required? - - [record, key] - } + end + @preloaded_records.group_by do |record| + convert_key(record[association_key_name]) + end end def reflection_scope @@ -137,14 +125,23 @@ module ActiveRecord scope.where_clause = reflection_scope.where_clause + preload_scope.where_clause scope.references_values = Array(values[:references]) + Array(preload_values[:references]) - scope._select! preload_values[:select] || values[:select] || table[Arel.star] + if preload_values[:select] || values[:select] + scope._select!(preload_values[:select] || values[:select]) + end scope.includes! preload_values[:includes] || values[:includes] if preload_scope.joins_values.any? scope.joins!(preload_scope.joins_values) else scope.joins!(reflection_scope.joins_values) end - scope.order! preload_values[:order] || values[:order] + + if order_values = preload_values[:order] || values[:order] + scope.order!(order_values) + end + + if preload_values[:reordering] || values[:reordering] + scope.reordering_value = true + end if preload_values[:readonly] || values[:readonly] scope.readonly! @@ -154,7 +151,7 @@ module ActiveRecord scope.where!(klass.table_name => { reflection.type => model.base_class.sti_name }) end - scope.unscope_values = Array(values[:unscope]) + scope.unscope_values = Array(values[:unscope]) + Array(preload_values[:unscope]) klass.default_scoped.merge(scope) end end diff --git a/activerecord/lib/active_record/associations/preloader/collection_association.rb b/activerecord/lib/active_record/associations/preloader/collection_association.rb index 5adffcd831..9939280fa4 100644 --- a/activerecord/lib/active_record/associations/preloader/collection_association.rb +++ b/activerecord/lib/active_record/associations/preloader/collection_association.rb @@ -2,13 +2,8 @@ module ActiveRecord module Associations class Preloader class CollectionAssociation < Association #:nodoc: - private - def build_scope - super.order(preload_scope.values[:order] || reflection_scope.values[:order]) - end - def preload(preloader) associated_records_by_owner(preloader).each do |owner, records| association = owner.association(reflection.name) @@ -17,7 +12,6 @@ module ActiveRecord records.each { |record| association.set_inverse_instance(record) } end end - end end end diff --git a/activerecord/lib/active_record/associations/preloader/has_one.rb b/activerecord/lib/active_record/associations/preloader/has_one.rb index 24728e9f01..c4add621ca 100644 --- a/activerecord/lib/active_record/associations/preloader/has_one.rb +++ b/activerecord/lib/active_record/associations/preloader/has_one.rb @@ -2,7 +2,6 @@ module ActiveRecord module Associations class Preloader class HasOne < SingularAssociation #:nodoc: - def association_key_name reflection.foreign_key end @@ -10,13 +9,6 @@ module ActiveRecord def owner_key_name reflection.active_record_primary_key end - - private - - def build_scope - super.order(preload_scope.values[:order] || reflection_scope.values[:order]) - end - end end end diff --git a/activerecord/lib/active_record/associations/preloader/through_association.rb b/activerecord/lib/active_record/associations/preloader/through_association.rb index 56aa23b173..6c83058202 100644 --- a/activerecord/lib/active_record/associations/preloader/through_association.rb +++ b/activerecord/lib/active_record/associations/preloader/through_association.rb @@ -18,7 +18,8 @@ module ActiveRecord through_records = owners.map do |owner| association = owner.association through_reflection.name - [owner, Array(association.reader)] + center = target_records_from_association(association) + [owner, Array(center)] end reset_association owners, through_reflection.name @@ -49,7 +50,7 @@ module ActiveRecord rhs_records = middles.flat_map { |r| association = r.association source_reflection.name - association.reader + target_records_from_association(association) }.compact rhs_records.sort_by { |rhs| record_offset[rhs] } @@ -84,11 +85,17 @@ module ActiveRecord end scope.references! reflection_scope.values[:references] - scope = scope.order reflection_scope.values[:order] if scope.eager_loading? + if scope.eager_loading? && order_values = reflection_scope.values[:order] + scope = scope.order(order_values) + end end scope end + + def target_records_from_association(association) + association.loaded? ? association.target : association.reader + end end end end diff --git a/activerecord/lib/active_record/associations/singular_association.rb b/activerecord/lib/active_record/associations/singular_association.rb index 58d0f7d65d..c7cc48ba16 100644 --- a/activerecord/lib/active_record/associations/singular_association.rb +++ b/activerecord/lib/active_record/associations/singular_association.rb @@ -3,7 +3,13 @@ module ActiveRecord class SingularAssociation < Association #:nodoc: # Implements the reader method, e.g. foo.bar for Foo.has_one :bar def reader(force_reload = false) - if force_reload + if force_reload && klass + ActiveSupport::Deprecation.warn(<<-MSG.squish) + Passing an argument to force an association to reload is now + deprecated and will be removed in Rails 5.1. Please call `reload` + on the parent object instead. + MSG + klass.uncached { reload } elsif !loaded? || stale_target? reload @@ -39,12 +45,7 @@ module ActiveRecord end def get_records - if reflection.scope_chain.any?(&:any?) || - scope.eager_loading? || - klass.scope_attributes? - - return scope.limit(1).to_a - end + return scope.limit(1).to_a if skip_statement_cache? conn = klass.connection sc = reflection.association_scope_cache(conn, owner) do diff --git a/activerecord/lib/active_record/associations/through_association.rb b/activerecord/lib/active_record/associations/through_association.rb index af1bce523c..d0ec3e8015 100644 --- a/activerecord/lib/active_record/associations/through_association.rb +++ b/activerecord/lib/active_record/associations/through_association.rb @@ -15,12 +15,6 @@ module ActiveRecord scope = super reflection.chain.drop(1).each do |reflection| relation = reflection.klass.all - - reflection_scope = reflection.scope - if reflection_scope && reflection_scope.arity.zero? - relation = relation.merge(reflection_scope) - end - scope.merge!( relation.except(:select, :create_with, :includes, :preload, :joins, :eager_load) ) @@ -82,13 +76,21 @@ module ActiveRecord def ensure_mutable unless source_reflection.belongs_to? - raise HasManyThroughCantAssociateThroughHasOneOrManyReflection.new(owner, reflection) + if reflection.has_one? + raise HasOneThroughCantAssociateThroughHasOneOrManyReflection.new(owner, reflection) + else + raise HasManyThroughCantAssociateThroughHasOneOrManyReflection.new(owner, reflection) + end end end def ensure_not_nested if reflection.nested? - raise HasManyThroughNestedAssociationsAreReadonly.new(owner, reflection) + if reflection.has_one? + raise HasOneThroughNestedAssociationsAreReadonly.new(owner, reflection) + else + raise HasManyThroughNestedAssociationsAreReadonly.new(owner, reflection) + end end end diff --git a/activerecord/lib/active_record/attribute.rb b/activerecord/lib/active_record/attribute.rb index 73dd3fa041..3c4c8f10ec 100644 --- a/activerecord/lib/active_record/attribute.rb +++ b/activerecord/lib/active_record/attribute.rb @@ -5,8 +5,8 @@ module ActiveRecord FromDatabase.new(name, value, type) end - def from_user(name, value, type) - FromUser.new(name, value, type) + def from_user(name, value, type, original_attribute = nil) + FromUser.new(name, value, type, original_attribute) end def with_cast_value(name, value, type) @@ -26,36 +26,46 @@ module ActiveRecord # This method should not be called directly. # Use #from_database or #from_user - def initialize(name, value_before_type_cast, type) + def initialize(name, value_before_type_cast, type, original_attribute = nil) @name = name @value_before_type_cast = value_before_type_cast @type = type + @original_attribute = original_attribute end def value # `defined?` is cheaper than `||=` when we get back falsy values - @value = original_value unless defined?(@value) + @value = type_cast(value_before_type_cast) unless defined?(@value) @value end def original_value - type_cast(value_before_type_cast) + if assigned? + original_attribute.original_value + else + type_cast(value_before_type_cast) + end end def value_for_database type.serialize(value) end - def changed_from?(old_value) - type.changed?(old_value, value, value_before_type_cast) + def changed? + changed_from_assignment? || changed_in_place? + end + + def changed_in_place? + has_been_read? && type.changed_in_place?(original_value_for_database, value) end - def changed_in_place_from?(old_value) - has_been_read? && type.changed_in_place?(old_value, value) + def forgetting_assignment + with_value_from_database(value_for_database) end def with_value_from_user(value) - self.class.from_user(name, value, type) + type.assert_valid_value(value) + self.class.from_user(name, value, type, self) end def with_value_from_database(value) @@ -67,7 +77,7 @@ module ActiveRecord end def with_type(type) - self.class.new(name, value_before_type_cast, type) + self.class.new(name, value_before_type_cast, type, original_attribute) end def type_cast(*) @@ -100,16 +110,39 @@ module ActiveRecord protected + attr_reader :original_attribute + alias_method :assigned?, :original_attribute + def initialize_dup(other) if defined?(@value) && @value.duplicable? @value = @value.dup end end + def changed_from_assignment? + assigned? && type.changed?(original_value, value, value_before_type_cast) + end + + def original_value_for_database + if assigned? + original_attribute.original_value_for_database + else + _original_value_for_database + end + end + + def _original_value_for_database + value_for_database + end + class FromDatabase < Attribute # :nodoc: def type_cast(value) type.deserialize(value) end + + def _original_value_for_database + value_before_type_cast + end end class FromUser < Attribute # :nodoc: diff --git a/activerecord/lib/active_record/attribute/user_provided_default.rb b/activerecord/lib/active_record/attribute/user_provided_default.rb new file mode 100644 index 0000000000..6dbd92ce28 --- /dev/null +++ b/activerecord/lib/active_record/attribute/user_provided_default.rb @@ -0,0 +1,23 @@ +require 'active_record/attribute' + +module ActiveRecord + class Attribute # :nodoc: + class UserProvidedDefault < FromUser # :nodoc: + def initialize(name, value, type, database_default) + super(name, value, type, database_default) + end + + def type_cast(value) + if value.is_a?(Proc) + super(value.call) + else + super + end + end + + def with_type(type) + self.class.new(name, value_before_type_cast, type, original_attribute) + end + end + end +end diff --git a/activerecord/lib/active_record/attribute_assignment.rb b/activerecord/lib/active_record/attribute_assignment.rb index 45fdcaa1cd..a6d81c82b4 100644 --- a/activerecord/lib/active_record/attribute_assignment.rb +++ b/activerecord/lib/active_record/attribute_assignment.rb @@ -5,7 +5,7 @@ module ActiveRecord extend ActiveSupport::Concern include ActiveModel::AttributeAssignment - # Alias for `assign_attributes`. See +ActiveModel::AttributeAssignment+. + # Alias for ActiveModel::AttributeAssignment#assign_attributes. See ActiveModel::AttributeAssignment. def attributes=(attributes) assign_attributes(attributes) end diff --git a/activerecord/lib/active_record/attribute_methods.rb b/activerecord/lib/active_record/attribute_methods.rb index 9d58a19304..423a93964e 100644 --- a/activerecord/lib/active_record/attribute_methods.rb +++ b/activerecord/lib/active_record/attribute_methods.rb @@ -1,7 +1,7 @@ require 'active_support/core_ext/enumerable' require 'active_support/core_ext/string/filters' require 'mutex_m' -require 'thread_safe' +require 'concurrent/map' module ActiveRecord # = Active Record Attribute Methods @@ -37,12 +37,12 @@ module ActiveRecord class AttributeMethodCache def initialize @module = Module.new - @method_cache = ThreadSafe::Cache.new + @method_cache = Concurrent::Map.new end def [](name) @method_cache.compute_if_absent(name) do - safe_name = name.unpack('h*').first + safe_name = name.unpack('h*'.freeze).first temp_method = "__temp__#{safe_name}" ActiveRecord::AttributeMethods::AttrNames.set_name_cache safe_name, name @module.module_eval method_body(temp_method, safe_name), __FILE__, __LINE__ @@ -96,7 +96,7 @@ module ActiveRecord end end - # Raises a <tt>ActiveRecord::DangerousAttributeError</tt> exception when an + # Raises an ActiveRecord::DangerousAttributeError exception when an # \Active \Record method is defined in the model, otherwise +false+. # # class Person < ActiveRecord::Base @@ -106,7 +106,7 @@ module ActiveRecord # end # # Person.instance_method_already_implemented?(:save) - # # => ActiveRecord::DangerousAttributeError: save is defined by ActiveRecord + # # => ActiveRecord::DangerousAttributeError: save is defined by Active Record. Check to make sure that you don't have an attribute or method with the same name. # # Person.instance_method_already_implemented?(:name) # # => false @@ -191,6 +191,18 @@ module ActiveRecord end end + # Returns true if the given attribute exists, otherwise false. + # + # class Person < ActiveRecord::Base + # end + # + # Person.has_attribute?('name') # => true + # Person.has_attribute?(:age) # => true + # Person.has_attribute?(:nothing) # => false + def has_attribute?(attr_name) + attribute_types.key?(attr_name.to_s) + end + # Returns the column object for the named attribute. # Returns a +ActiveRecord::ConnectionAdapters::NullColumn+ if the # named attribute does not exist. @@ -230,7 +242,15 @@ module ActiveRecord # person.respond_to(:nothing) # => false def respond_to?(name, include_private = false) return false unless super - name = name.to_s + + case name + when :to_partial_path + name = "to_partial_path".freeze + when :to_model + name = "to_model".freeze + else + name = name.to_s + end # If the result is true then check for the select case. # For queries selecting a subset of columns, return false for unselected columns. @@ -338,7 +358,7 @@ module ActiveRecord # # Note: +:id+ is always present. # - # Alias for the <tt>read_attribute</tt> method. + # Alias for the #read_attribute method. # # class Person < ActiveRecord::Base # belongs_to :organization @@ -356,7 +376,7 @@ module ActiveRecord end # Updates the attribute identified by <tt>attr_name</tt> with the specified +value+. - # (Alias for the protected <tt>write_attribute</tt> method). + # (Alias for the protected #write_attribute method). # # class Person < ActiveRecord::Base # end @@ -377,27 +397,27 @@ module ActiveRecord # # For example: # - # class PostsController < ActionController::Base - # after_action :print_accessed_fields, only: :index + # class PostsController < ActionController::Base + # after_action :print_accessed_fields, only: :index # - # def index - # @posts = Post.all - # end + # def index + # @posts = Post.all + # end # - # private + # private # - # def print_accessed_fields - # p @posts.first.accessed_fields + # def print_accessed_fields + # p @posts.first.accessed_fields + # end # end - # end # # Which allows you to quickly change your code to: # - # class PostsController < ActionController::Base - # def index - # @posts = Post.select(:id, :title, :author_id, :updated_at) + # class PostsController < ActionController::Base + # def index + # @posts = Post.select(:id, :title, :author_id, :updated_at) + # end # end - # end def accessed_fields @attributes.accessed end diff --git a/activerecord/lib/active_record/attribute_methods/before_type_cast.rb b/activerecord/lib/active_record/attribute_methods/before_type_cast.rb index 56c1898551..1db6776688 100644 --- a/activerecord/lib/active_record/attribute_methods/before_type_cast.rb +++ b/activerecord/lib/active_record/attribute_methods/before_type_cast.rb @@ -2,7 +2,7 @@ module ActiveRecord module AttributeMethods # = Active Record Attribute Methods Before Type Cast # - # <tt>ActiveRecord::AttributeMethods::BeforeTypeCast</tt> provides a way to + # ActiveRecord::AttributeMethods::BeforeTypeCast provides a way to # read the value of the attributes before typecasting and deserialization. # # class Task < ActiveRecord::Base diff --git a/activerecord/lib/active_record/attribute_methods/dirty.rb b/activerecord/lib/active_record/attribute_methods/dirty.rb index 7ba907f786..0bcfa5f00d 100644 --- a/activerecord/lib/active_record/attribute_methods/dirty.rb +++ b/activerecord/lib/active_record/attribute_methods/dirty.rb @@ -1,4 +1,5 @@ require 'active_support/core_ext/module/attribute_accessors' +require 'active_record/attribute_mutation_tracker' module ActiveRecord module AttributeMethods @@ -34,23 +35,43 @@ module ActiveRecord # <tt>reload</tt> the record and clears changed attributes. def reload(*) super.tap do - clear_changes_information + @mutation_tracker = nil + @previous_mutation_tracker = nil + @changed_attributes = HashWithIndifferentAccess.new end end def initialize_dup(other) # :nodoc: super - calculate_changes_from_defaults + @attributes = self.class._default_attributes.map do |attr| + attr.with_value_from_user(@attributes.fetch_value(attr.name)) + end + @mutation_tracker = nil end def changes_applied - super - store_original_raw_attributes + @previous_mutation_tracker = mutation_tracker + @changed_attributes = HashWithIndifferentAccess.new + store_original_attributes end def clear_changes_information + @previous_mutation_tracker = nil + @changed_attributes = HashWithIndifferentAccess.new + store_original_attributes + end + + def raw_write_attribute(attr_name, *) + result = super + clear_attribute_change(attr_name) + result + end + + def clear_attribute_changes(attr_names) super - original_raw_attributes.clear + attr_names.each do |attr_name| + clear_attribute_change(attr_name) + end end def changed_attributes @@ -59,7 +80,7 @@ module ActiveRecord if defined?(@cached_changed_attributes) @cached_changed_attributes else - super.reverse_merge(attributes_changed_in_place).freeze + super.reverse_merge(mutation_tracker.changed_values).freeze end end @@ -69,58 +90,29 @@ module ActiveRecord end end + def previous_changes + previous_mutation_tracker.changes + end + def attribute_changed_in_place?(attr_name) - old_value = original_raw_attribute(attr_name) - @attributes[attr_name].changed_in_place_from?(old_value) + mutation_tracker.changed_in_place?(attr_name) end private - def changes_include?(attr_name) - super || attribute_changed_in_place?(attr_name) - end - - def calculate_changes_from_defaults - @changed_attributes = nil - self.class.column_defaults.each do |attr, orig_value| - set_attribute_was(attr, orig_value) if _field_changed?(attr, orig_value) + def mutation_tracker + unless defined?(@mutation_tracker) + @mutation_tracker = nil end + @mutation_tracker ||= AttributeMutationTracker.new(@attributes) end - # Wrap write_attribute to remember original attribute value. - def write_attribute(attr, value) - attr = attr.to_s - - old_value = old_attribute_value(attr) - - result = super - store_original_raw_attribute(attr) - save_changed_attribute(attr, old_value) - result - end - - def raw_write_attribute(attr, value) - attr = attr.to_s - - result = super - original_raw_attributes[attr] = value - result - end - - def save_changed_attribute(attr, old_value) - if attribute_changed_by_setter?(attr) - clear_attribute_changes(attr) unless _field_changed?(attr, old_value) - else - set_attribute_was(attr, old_value) if _field_changed?(attr, old_value) - end + def changes_include?(attr_name) + super || mutation_tracker.changed?(attr_name) end - def old_attribute_value(attr) - if attribute_changed?(attr) - changed_attributes[attr] - else - clone_attribute_value(:_read_attribute, attr) - end + def clear_attribute_change(attr_name) + mutation_tracker.forget_change(attr_name) end def _update_record(*) @@ -135,48 +127,24 @@ module ActiveRecord changed & self.class.column_names end - def _field_changed?(attr, old_value) - @attributes[attr].changed_from?(old_value) - end - - def attributes_changed_in_place - changed_in_place.each_with_object({}) do |attr_name, h| - orig = @attributes[attr_name].original_value - h[attr_name] = orig - end + def store_original_attributes + @attributes = @attributes.map(&:forgetting_assignment) + @mutation_tracker = nil end - def changed_in_place - self.class.attribute_names.select do |attr_name| - attribute_changed_in_place?(attr_name) - end - end - - def original_raw_attribute(attr_name) - original_raw_attributes.fetch(attr_name) do - read_attribute_before_type_cast(attr_name) - end - end - - def original_raw_attributes - @original_raw_attributes ||= {} - end - - def store_original_raw_attribute(attr_name) - original_raw_attributes[attr_name] = @attributes[attr_name].value_for_database rescue nil - end - - def store_original_raw_attributes - attribute_names.each do |attr| - store_original_raw_attribute(attr) - end + def previous_mutation_tracker + @previous_mutation_tracker ||= NullMutationTracker.instance end def cache_changed_attributes @cached_changed_attributes = changed_attributes yield ensure - remove_instance_variable(:@cached_changed_attributes) + clear_changed_attributes_cache + end + + def clear_changed_attributes_cache + remove_instance_variable(:@cached_changed_attributes) if defined?(@cached_changed_attributes) end end end diff --git a/activerecord/lib/active_record/attribute_methods/primary_key.rb b/activerecord/lib/active_record/attribute_methods/primary_key.rb index c28374e4ab..0d5cb8b37c 100644 --- a/activerecord/lib/active_record/attribute_methods/primary_key.rb +++ b/activerecord/lib/active_record/attribute_methods/primary_key.rb @@ -5,7 +5,7 @@ module ActiveRecord module PrimaryKey extend ActiveSupport::Concern - # Returns this record's primary key value wrapped in an Array if one is + # Returns this record's primary key value wrapped in an array if one is # available. def to_key sync_with_transaction_state @@ -108,7 +108,7 @@ module ActiveRecord # self.primary_key = 'sysid' # end # - # You can also define the +primary_key+ method yourself: + # You can also define the #primary_key method yourself: # # class Project < ActiveRecord::Base # def self.primary_key diff --git a/activerecord/lib/active_record/attribute_methods/query.rb b/activerecord/lib/active_record/attribute_methods/query.rb index 553122a5fc..10498f4322 100644 --- a/activerecord/lib/active_record/attribute_methods/query.rb +++ b/activerecord/lib/active_record/attribute_methods/query.rb @@ -19,7 +19,7 @@ module ActiveRecord if Numeric === value || value !~ /[^0-9]/ !value.to_i.zero? else - return false if ActiveRecord::ConnectionAdapters::Column::FALSE_VALUES.include?(value) + return false if ActiveModel::Type::Boolean::FALSE_VALUES.include?(value) !value.blank? end elsif value.respond_to?(:zero?) diff --git a/activerecord/lib/active_record/attribute_methods/read.rb b/activerecord/lib/active_record/attribute_methods/read.rb index 0d989c2eca..5197e21fa4 100644 --- a/activerecord/lib/active_record/attribute_methods/read.rb +++ b/activerecord/lib/active_record/attribute_methods/read.rb @@ -37,7 +37,7 @@ module ActiveRecord protected def define_method_attribute(name) - safe_name = name.unpack('h*').first + safe_name = name.unpack('h*'.freeze).first temp_method = "__temp__#{safe_name}" ActiveRecord::AttributeMethods::AttrNames.set_name_cache safe_name, name @@ -56,14 +56,12 @@ module ActiveRecord end end - ID = 'id'.freeze - # Returns the value of the attribute identified by <tt>attr_name</tt> after # it has been typecast (for example, "2004-12-12" in a date column is cast # to a date object, like Date.new(2004, 12, 12)). def read_attribute(attr_name, &block) name = attr_name.to_s - name = self.class.primary_key if name == ID + name = self.class.primary_key if name == 'id'.freeze _read_attribute(name, &block) end diff --git a/activerecord/lib/active_record/attribute_methods/serialization.rb b/activerecord/lib/active_record/attribute_methods/serialization.rb index d0d8a968c5..65978aea2a 100644 --- a/activerecord/lib/active_record/attribute_methods/serialization.rb +++ b/activerecord/lib/active_record/attribute_methods/serialization.rb @@ -9,7 +9,19 @@ module ActiveRecord # attribute using this method and it will be handled automatically. The # serialization is done through YAML. If +class_name+ is specified, the # serialized object must be of that class on assignment and retrieval. - # Otherwise <tt>SerializationTypeMismatch</tt> will be raised. + # Otherwise SerializationTypeMismatch will be raised. + # + # Empty objects as <tt>{}</tt>, in the case of +Hash+, or <tt>[]</tt>, in the case of + # +Array+, will always be persisted as null. + # + # Keep in mind that database adapters handle certain serialization tasks + # for you. For instance: +json+ and +jsonb+ types in PostgreSQL will be + # converted between JSON object/array syntax and Ruby +Hash+ or +Array+ + # objects transparently. There is no need to use #serialize in this + # case. + # + # For more complex cases, such as conversion to or from your application + # domain objects, consider using the ActiveRecord::Attributes API. # # ==== Parameters # diff --git a/activerecord/lib/active_record/attribute_methods/time_zone_conversion.rb b/activerecord/lib/active_record/attribute_methods/time_zone_conversion.rb index f9beb43e4b..061628725d 100644 --- a/activerecord/lib/active_record/attribute_methods/time_zone_conversion.rb +++ b/activerecord/lib/active_record/attribute_methods/time_zone_conversion.rb @@ -1,3 +1,5 @@ +require 'active_support/core_ext/string/strip' + module ActiveRecord module AttributeMethods module TimeZoneConversion @@ -7,28 +9,32 @@ module ActiveRecord end def cast(value) - if value.is_a?(Array) - value.map { |v| cast(v) } - elsif value.is_a?(Hash) + return if value.nil? + + if value.is_a?(Hash) set_time_zone_without_conversion(super) elsif value.respond_to?(:in_time_zone) begin - user_input_in_time_zone(value) || super + super(user_input_in_time_zone(value)) || super rescue ArgumentError nil end + else + map(super) { |t| cast(t) } end end private def convert_time_to_time_zone(value) - if value.is_a?(Array) - value.map { |v| convert_time_to_time_zone(v) } - elsif value.acts_like?(:time) + return if value.nil? + + if value.acts_like?(:time) value.in_time_zone - else + elsif value.is_a?(::Float) value + else + map(value) { |v| convert_time_to_time_zone(v) } end end @@ -77,7 +83,7 @@ module ActiveRecord !result && cast_type.type == :time && time_zone_aware_types.include?(:not_explicitly_configured) - ActiveSupport::Deprecation.warn(<<-MESSAGE) + ActiveSupport::Deprecation.warn(<<-MESSAGE.strip_heredoc) Time columns will become time zone aware in Rails 5.1. This still causes `String`s to be parsed as if they were in `Time.zone`, and `Time`s to be converted to `Time.zone`. diff --git a/activerecord/lib/active_record/attribute_methods/write.rb b/activerecord/lib/active_record/attribute_methods/write.rb index ab017c7b54..bbf2a51a0e 100644 --- a/activerecord/lib/active_record/attribute_methods/write.rb +++ b/activerecord/lib/active_record/attribute_methods/write.rb @@ -24,7 +24,7 @@ module ActiveRecord protected def define_method_attribute=(name) - safe_name = name.unpack('h*').first + safe_name = name.unpack('h*'.freeze).first ActiveRecord::AttributeMethods::AttrNames.set_name_cache safe_name, name generated_attribute_methods.module_eval <<-STR, __FILE__, __LINE__ + 1 @@ -45,7 +45,7 @@ module ActiveRecord write_attribute_with_type_cast(attr_name, value, true) end - def raw_write_attribute(attr_name, value) + def raw_write_attribute(attr_name, value) # :nodoc: write_attribute_with_type_cast(attr_name, value, false) end diff --git a/activerecord/lib/active_record/attribute_mutation_tracker.rb b/activerecord/lib/active_record/attribute_mutation_tracker.rb new file mode 100644 index 0000000000..0133b4d0be --- /dev/null +++ b/activerecord/lib/active_record/attribute_mutation_tracker.rb @@ -0,0 +1,70 @@ +module ActiveRecord + class AttributeMutationTracker # :nodoc: + def initialize(attributes) + @attributes = attributes + end + + def changed_values + attr_names.each_with_object({}.with_indifferent_access) do |attr_name, result| + if changed?(attr_name) + result[attr_name] = attributes[attr_name].original_value + end + end + end + + def changes + attr_names.each_with_object({}.with_indifferent_access) do |attr_name, result| + if changed?(attr_name) + result[attr_name] = [attributes[attr_name].original_value, attributes.fetch_value(attr_name)] + end + end + end + + def changed?(attr_name) + attr_name = attr_name.to_s + attributes[attr_name].changed? + end + + def changed_in_place?(attr_name) + attributes[attr_name].changed_in_place? + end + + def forget_change(attr_name) + attr_name = attr_name.to_s + attributes[attr_name] = attributes[attr_name].forgetting_assignment + end + + protected + + attr_reader :attributes + + private + + def attr_names + attributes.keys + end + end + + class NullMutationTracker # :nodoc: + include Singleton + + def changed_values + {} + end + + def changes + {} + end + + def changed?(*) + false + end + + def changed_in_place?(*) + false + end + + def forget_change(*) + end + end +end diff --git a/activerecord/lib/active_record/attribute_set.rb b/activerecord/lib/active_record/attribute_set.rb index 013a7d0e01..be581ac2a9 100644 --- a/activerecord/lib/active_record/attribute_set.rb +++ b/activerecord/lib/active_record/attribute_set.rb @@ -60,8 +60,14 @@ module ActiveRecord super end + def deep_dup + dup.tap do |copy| + copy.instance_variable_set(:@attributes, attributes.deep_dup) + end + end + def initialize_dup(_) - @attributes = attributes.deep_dup + @attributes = attributes.dup super end @@ -80,6 +86,15 @@ module ActiveRecord attributes.select { |_, attr| attr.has_been_read? }.keys end + def map(&block) + new_attributes = attributes.transform_values(&block) + AttributeSet.new(new_attributes) + end + + def ==(other) + attributes == other.attributes + end + protected attr_reader :attributes diff --git a/activerecord/lib/active_record/attribute_set/builder.rb b/activerecord/lib/active_record/attribute_set/builder.rb index e85777c335..3bd7c7997b 100644 --- a/activerecord/lib/active_record/attribute_set/builder.rb +++ b/activerecord/lib/active_record/attribute_set/builder.rb @@ -1,3 +1,5 @@ +require 'active_record/attribute' + module ActiveRecord class AttributeSet # :nodoc: class Builder # :nodoc: @@ -45,8 +47,14 @@ module ActiveRecord delegate_hash[key] = value end + def deep_dup + dup.tap do |copy| + copy.instance_variable_set(:@delegate_hash, delegate_hash.transform_values(&:dup)) + end + end + def initialize_dup(_) - @delegate_hash = delegate_hash.transform_values(&:dup) + @delegate_hash = Hash[delegate_hash] super end @@ -60,10 +68,29 @@ module ActiveRecord end end + def ==(other) + if other.is_a?(LazyAttributeHash) + materialize == other.materialize + else + materialize == other + end + end + protected attr_reader :types, :values, :additional_types, :delegate_hash + def materialize + unless @materialized + values.each_key { |key| self[key] } + types.each_key { |key| self[key] } + unless frozen? + @materialized = true + end + end + delegate_hash + end + private def assign_default_value(name) @@ -77,16 +104,5 @@ module ActiveRecord delegate_hash[name] = Attribute.uninitialized(name, type) end end - - def materialize - unless @materialized - values.each_key { |key| self[key] } - types.each_key { |key| self[key] } - unless frozen? - @materialized = true - end - end - delegate_hash - end end end diff --git a/activerecord/lib/active_record/attributes.rb b/activerecord/lib/active_record/attributes.rb index 50339b6f69..5d0405c3be 100644 --- a/activerecord/lib/active_record/attributes.rb +++ b/activerecord/lib/active_record/attributes.rb @@ -1,11 +1,10 @@ +require 'active_record/attribute/user_provided_default' + module ActiveRecord # See ActiveRecord::Attributes::ClassMethods for documentation module Attributes extend ActiveSupport::Concern - # :nodoc: - Type = ActiveRecord::Type - included do class_attribute :attributes_to_define_after_schema_loads, instance_accessor: false # :internal: self.attributes_to_define_after_schema_loads = {} @@ -16,7 +15,7 @@ module ActiveRecord # type of existing attributes if needed. This allows control over how # values are converted to and from SQL when assigned to a model. It also # changes the behavior of values passed to - # ActiveRecord::QueryMethods#where. This will let you use + # {ActiveRecord::Base.where}[rdoc-ref:QueryMethods#where]. This will let you use # your domain objects across much of Active Record, without having to # rely on implementation details or monkey patching. # @@ -80,7 +79,15 @@ module ActiveRecord # # StoreListing.new.my_string # => "new default" # - # Attributes do not need to be backed by a database column. + # class Product < ActiveRecord::Base + # attribute :my_default_proc, :datetime, default: -> { Time.now } + # end + # + # Product.new.my_default_proc # => 2015-05-30 11:04:48 -0600 + # sleep 1 + # Product.new.my_default_proc # => 2015-05-30 11:04:49 -0600 + # + # \Attributes do not need to be backed by a database column. # # class MyModel < ActiveRecord::Base # attribute :my_string, :string @@ -112,7 +119,7 @@ module ActiveRecord # # class MoneyType < ActiveRecord::Type::Integer # def cast(value) - # if value.include?('$') + # if !value.kind_of(Numeric) && value.include?('$') # price_in_dollars = value.gsub(/\$/, '').to_f # super(price_in_dollars * 100) # else @@ -137,9 +144,9 @@ module ActiveRecord # to be referenced by a symbol, see ActiveRecord::Type.register. You can # also pass a type object directly, in place of a symbol. # - # ==== Querying + # ==== \Querying # - # When ActiveRecord::QueryMethods#where is called, it will + # When {ActiveRecord::Base.where}[rdoc-ref:QueryMethods#where] is called, it will # use the type defined by the model class to convert the value to SQL, # calling +serialize+ on your type object. For example: # @@ -202,7 +209,8 @@ module ActiveRecord # # +default+ The default value to use when no value is provided. If this option # is not passed, the previous default value (if any) will be used. - # Otherwise, the default will be +nil+. + # Otherwise, the default will be +nil+. A proc can also be passed, and + # will be called once each time a new value is needed. # # +user_provided_default+ Whether the default value should be cast using # +cast+ or +deserialize+. @@ -236,7 +244,12 @@ module ActiveRecord if value == NO_DEFAULT_PROVIDED default_attribute = _default_attributes[name].with_type(type) elsif from_user - default_attribute = Attribute.from_user(name, value, type) + default_attribute = Attribute::UserProvidedDefault.new( + name, + value, + type, + _default_attributes[name], + ) else default_attribute = Attribute.from_database(name, value, type) end diff --git a/activerecord/lib/active_record/autosave_association.rb b/activerecord/lib/active_record/autosave_association.rb index 0792d19c3e..bac5a38a5d 100644 --- a/activerecord/lib/active_record/autosave_association.rb +++ b/activerecord/lib/active_record/autosave_association.rb @@ -1,10 +1,10 @@ module ActiveRecord # = Active Record Autosave Association # - # +AutosaveAssociation+ is a module that takes care of automatically saving + # AutosaveAssociation is a module that takes care of automatically saving # associated records when their parent is saved. In addition to saving, it # also destroys any associated records that were marked for destruction. - # (See +mark_for_destruction+ and <tt>marked_for_destruction?</tt>). + # (See #mark_for_destruction and #marked_for_destruction?). # # Saving of the parent, its associations, and the destruction of marked # associations, all happen inside a transaction. This should never leave the @@ -125,7 +125,6 @@ module ActiveRecord # Now it _is_ removed from the database: # # Comment.find_by(id: id).nil? # => true - module AutosaveAssociation extend ActiveSupport::Concern @@ -141,9 +140,11 @@ module ActiveRecord included do Associations::Builder::Association.extensions << AssociationBuilderExtension + mattr_accessor :index_nested_attribute_errors, instance_writer: false + self.index_nested_attribute_errors = false end - module ClassMethods + module ClassMethods # :nodoc: private def define_non_cyclic_method(name, &block) @@ -222,6 +223,7 @@ module ActiveRecord true end validate validation_method + after_validation :_ensure_no_duplicate_errors end end end @@ -233,7 +235,7 @@ module ActiveRecord super end - # Marks this record to be destroyed as part of the parents save transaction. + # Marks this record to be destroyed as part of the parent's save transaction. # This does _not_ actually destroy the record instantly, rather child record will be destroyed # when <tt>parent.save</tt> is called. # @@ -242,7 +244,7 @@ module ActiveRecord @marked_for_destruction = true end - # Returns whether or not this record will be destroyed as part of the parents save transaction. + # Returns whether or not this record will be destroyed as part of the parent's save transaction. # # Only useful if the <tt>:autosave</tt> option on the parent is enabled for this associated model. def marked_for_destruction? @@ -315,7 +317,7 @@ module ActiveRecord def validate_collection_association(reflection) if association = association_instance_get(reflection.name) if records = associated_records_to_validate_or_save(association, new_record?, reflection.options[:autosave]) - records.each { |record| association_valid?(reflection, record) } + records.each_with_index { |record, index| association_valid?(reflection, record, index) } end end end @@ -323,17 +325,36 @@ module ActiveRecord # Returns whether or not the association is valid and applies any errors to # the parent, <tt>self</tt>, if it wasn't. Skips any <tt>:autosave</tt> # enabled records if they're marked_for_destruction? or destroyed. - def association_valid?(reflection, record) - return true if record.destroyed? || record.marked_for_destruction? + def association_valid?(reflection, record, index=nil) + return true if record.destroyed? || (reflection.options[:autosave] && record.marked_for_destruction?) validation_context = self.validation_context unless [:create, :update].include?(self.validation_context) unless valid = record.valid?(validation_context) if reflection.options[:autosave] + indexed_attribute = !index.nil? && (reflection.options[:index_errors] || ActiveRecord::Base.index_nested_attribute_errors) + record.errors.each do |attribute, message| - attribute = "#{reflection.name}.#{attribute}" + if indexed_attribute + attribute = "#{reflection.name}[#{index}].#{attribute}" + else + attribute = "#{reflection.name}.#{attribute}" + end errors[attribute] << message errors[attribute].uniq! end + + record.errors.details.each_key do |attribute| + if indexed_attribute + reflection_attribute = "#{reflection.name}[#{index}].#{attribute}" + else + reflection_attribute = "#{reflection.name}.#{attribute}" + end + + record.errors.details[attribute].each do |error| + errors.details[reflection_attribute] << error + errors.details[reflection_attribute].uniq! + end + end else errors.add(reflection.name) end @@ -352,7 +373,7 @@ module ActiveRecord # <tt>:autosave</tt> is enabled on the association. # # In addition, it destroys all children that were marked for destruction - # with mark_for_destruction. + # with #mark_for_destruction. # # This all happens inside a transaction, _if_ the Transactions module is included into # ActiveRecord::Base after the AutosaveAssociation module, which it does by default. @@ -395,7 +416,7 @@ module ActiveRecord # on the association. # # In addition, it will destroy the association if it was marked for - # destruction with mark_for_destruction. + # destruction with #mark_for_destruction. # # This all happens inside a transaction, _if_ the Transactions module is included into # ActiveRecord::Base after the AutosaveAssociation module, which it does by default. @@ -456,5 +477,11 @@ module ActiveRecord end end end + + def _ensure_no_duplicate_errors + errors.messages.each_key do |attribute| + errors[attribute].uniq! + end + end end end diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb index 9c5b7d937d..4a31a1aa84 100644 --- a/activerecord/lib/active_record/base.rb +++ b/activerecord/lib/active_record/base.rb @@ -1,11 +1,9 @@ require 'yaml' -require 'set' require 'active_support/benchmarkable' require 'active_support/dependencies' require 'active_support/descendants_tracker' require 'active_support/time' require 'active_support/core_ext/module/attribute_accessors' -require 'active_support/core_ext/class/delegating_attributes' require 'active_support/core_ext/array/extract_options' require 'active_support/core_ext/hash/deep_merge' require 'active_support/core_ext/hash/slice' @@ -172,7 +170,7 @@ module ActiveRecord #:nodoc: # <tt>Person.find_by_user_name(user_name)</tt>. # # It's possible to add an exclamation point (!) on the end of the dynamic finders to get them to raise an - # <tt>ActiveRecord::RecordNotFound</tt> error if they do not return any records, + # ActiveRecord::RecordNotFound error if they do not return any records, # like <tt>Person.find_by_last_name!</tt>. # # It's also possible to use multiple attributes in the same find by separating them with "_and_". @@ -187,7 +185,8 @@ module ActiveRecord #:nodoc: # == Saving arrays, hashes, and other non-mappable objects in text columns # # Active Record can serialize any object in text columns using YAML. To do so, you must - # specify this with a call to the class method +serialize+. + # specify this with a call to the class method + # {serialize}[rdoc-ref:AttributeMethods::Serialization::ClassMethods#serialize]. # This makes it possible to store arrays, hashes, and other non-mappable objects without doing # any additional work. # @@ -227,39 +226,47 @@ module ActiveRecord #:nodoc: # # == Connection to multiple databases in different models # - # Connections are usually created through ActiveRecord::Base.establish_connection and retrieved + # Connections are usually created through + # {ActiveRecord::Base.establish_connection}[rdoc-ref:ConnectionHandling#establish_connection] and retrieved # by ActiveRecord::Base.connection. All classes inheriting from ActiveRecord::Base will use this # connection. But you can also set a class-specific connection. For example, if Course is an # ActiveRecord::Base, but resides in a different database, you can just say <tt>Course.establish_connection</tt> # and Course and all of its subclasses will use this connection instead. # # This feature is implemented by keeping a connection pool in ActiveRecord::Base that is - # a Hash indexed by the class. If a connection is requested, the retrieve_connection method + # a hash indexed by the class. If a connection is requested, the + # {ActiveRecord::Base.retrieve_connection}[rdoc-ref:ConnectionHandling#retrieve_connection] method # will go up the class-hierarchy until a connection is found in the connection pool. # # == Exceptions # # * ActiveRecordError - Generic error class and superclass of all other errors raised by Active Record. - # * AdapterNotSpecified - The configuration hash used in <tt>establish_connection</tt> didn't include an - # <tt>:adapter</tt> key. - # * AdapterNotFound - The <tt>:adapter</tt> key used in <tt>establish_connection</tt> specified a - # non-existent adapter + # * AdapterNotSpecified - The configuration hash used in + # {ActiveRecord::Base.establish_connection}[rdoc-ref:ConnectionHandling#establish_connection] + # didn't include an <tt>:adapter</tt> key. + # * AdapterNotFound - The <tt>:adapter</tt> key used in + # {ActiveRecord::Base.establish_connection}[rdoc-ref:ConnectionHandling#establish_connection] + # specified a non-existent adapter # (or a bad spelling of an existing one). # * AssociationTypeMismatch - The object assigned to the association wasn't of the type # specified in the association definition. # * AttributeAssignmentError - An error occurred while doing a mass assignment through the - # <tt>attributes=</tt> method. + # {ActiveRecord::Base#attributes=}[rdoc-ref:AttributeAssignment#attributes=] method. # You can inspect the +attribute+ property of the exception object to determine which attribute # triggered the error. - # * ConnectionNotEstablished - No connection has been established. Use <tt>establish_connection</tt> - # before querying. + # * ConnectionNotEstablished - No connection has been established. + # Use {ActiveRecord::Base.establish_connection}[rdoc-ref:ConnectionHandling#establish_connection] before querying. # * MultiparameterAssignmentErrors - Collection of errors that occurred during a mass assignment using the - # <tt>attributes=</tt> method. The +errors+ property of this exception contains an array of + # {ActiveRecord::Base#attributes=}[rdoc-ref:AttributeAssignment#attributes=] method. + # The +errors+ property of this exception contains an array of # AttributeAssignmentError # objects that should be inspected to determine which attributes triggered the errors. - # * RecordInvalid - raised by <tt>save!</tt> and <tt>create!</tt> when the record is invalid. - # * RecordNotFound - No record responded to the +find+ method. Either the row with the given ID doesn't exist - # or the row didn't meet the additional restrictions. Some +find+ calls do not raise this exception to signal + # * RecordInvalid - raised by {ActiveRecord::Base#save!}[rdoc-ref:Persistence#save!] and + # {ActiveRecord::Base.create!}[rdoc-ref:Persistence::ClassMethods#create!] + # when the record is invalid. + # * RecordNotFound - No record responded to the {ActiveRecord::Base.find}[rdoc-ref:FinderMethods#find] method. + # Either the row with the given ID doesn't exist or the row didn't meet the additional restrictions. + # Some {ActiveRecord::Base.find}[rdoc-ref:FinderMethods#find] calls do not raise this exception to signal # nothing was found, please check its documentation for further details. # * SerializationTypeMismatch - The serialized object wasn't of the class specified as the second parameter. # * StatementInvalid - The database server rejected the SQL statement. The precise error is added in the message. @@ -281,6 +288,7 @@ module ActiveRecord #:nodoc: extend Explain extend Enum extend Delegation::DelegateCache + extend CollectionCacheKey include Core include Persistence diff --git a/activerecord/lib/active_record/callbacks.rb b/activerecord/lib/active_record/callbacks.rb index 3027ce928e..854f9776a3 100644 --- a/activerecord/lib/active_record/callbacks.rb +++ b/activerecord/lib/active_record/callbacks.rb @@ -1,11 +1,11 @@ module ActiveRecord - # = Active Record Callbacks + # = Active Record \Callbacks # - # Callbacks are hooks into the life cycle of an Active Record object that allow you to trigger logic + # \Callbacks are hooks into the life cycle of an Active Record object that allow you to trigger logic # before or after an alteration of the object state. This can be used to make sure that associated and - # dependent objects are deleted when +destroy+ is called (by overwriting +before_destroy+) or to massage attributes - # before they're validated (by overwriting +before_validation+). As an example of the callbacks initiated, consider - # the <tt>Base#save</tt> call for a new record: + # dependent objects are deleted when {ActiveRecord::Base#destroy}[rdoc-ref:Persistence#destroy] is called (by overwriting +before_destroy+) or + # to massage attributes before they're validated (by overwriting +before_validation+). + # As an example of the callbacks initiated, consider the {ActiveRecord::Base#save}[rdoc-ref:Persistence#save] call for a new record: # # * (-) <tt>save</tt> # * (-) <tt>valid</tt> @@ -20,7 +20,7 @@ module ActiveRecord # * (7) <tt>after_commit</tt> # # Also, an <tt>after_rollback</tt> callback can be configured to be triggered whenever a rollback is issued. - # Check out <tt>ActiveRecord::Transactions</tt> for more details about <tt>after_commit</tt> and + # Check out ActiveRecord::Transactions for more details about <tt>after_commit</tt> and # <tt>after_rollback</tt>. # # Additionally, an <tt>after_touch</tt> callback is triggered whenever an @@ -31,7 +31,7 @@ module ActiveRecord # are instantiated as well. # # There are nineteen callbacks in total, which give you immense power to react and prepare for each state in the - # Active Record life cycle. The sequence for calling <tt>Base#save</tt> for an existing record is similar, + # Active Record life cycle. The sequence for calling {ActiveRecord::Base#save}[rdoc-ref:Persistence#save] for an existing record is similar, # except that each <tt>_create</tt> callback is replaced by the corresponding <tt>_update</tt> callback. # # Examples: @@ -175,26 +175,12 @@ module ActiveRecord # end # end # - # The callback macros usually accept a symbol for the method they're supposed to run, but you can also - # pass a "method string", which will then be evaluated within the binding of the callback. Example: - # - # class Topic < ActiveRecord::Base - # before_destroy 'self.class.delete_all "parent_id = #{id}"' - # end - # - # Notice that single quotes (') are used so the <tt>#{id}</tt> part isn't evaluated until the callback - # is triggered. Also note that these inline callbacks can be stacked just like the regular ones: - # - # class Topic < ActiveRecord::Base - # before_destroy 'self.class.delete_all "parent_id = #{id}"', - # 'puts "Evaluated after parents are destroyed"' - # end - # # == <tt>before_validation*</tt> returning statements # # If the +before_validation+ callback throws +:abort+, the process will be - # aborted and <tt>Base#save</tt> will return +false+. If Base#save! is called it will raise a - # <tt>ActiveRecord::RecordInvalid</tt> exception. Nothing will be appended to the errors object. + # aborted and {ActiveRecord::Base#save}[rdoc-ref:Persistence#save] will return +false+. + # If {ActiveRecord::Base#save!}[rdoc-ref:Persistence#save!] is called it will raise a ActiveRecord::RecordInvalid exception. + # Nothing will be appended to the errors object. # # == Canceling callbacks # @@ -206,12 +192,13 @@ module ActiveRecord # == Ordering callbacks # # Sometimes the code needs that the callbacks execute in a specific order. For example, a +before_destroy+ - # callback (+log_children+ in this case) should be executed before the children get destroyed by the +dependent: destroy+ option. + # callback (+log_children+ in this case) should be executed before the children get destroyed by the + # <tt>dependent: :destroy</tt> option. # # Let's look at the code below: # # class Topic < ActiveRecord::Base - # has_many :children, dependent: destroy + # has_many :children, dependent: :destroy # # before_destroy :log_children # @@ -222,10 +209,11 @@ module ActiveRecord # end # # In this case, the problem is that when the +before_destroy+ callback is executed, the children are not available - # because the +destroy+ callback gets executed first. You can use the +prepend+ option on the +before_destroy+ callback to avoid this. + # because the {ActiveRecord::Base#destroy}[rdoc-ref:Persistence#destroy] callback gets executed first. + # You can use the +prepend+ option on the +before_destroy+ callback to avoid this. # # class Topic < ActiveRecord::Base - # has_many :children, dependent: destroy + # has_many :children, dependent: :destroy # # before_destroy :log_children, prepend: true # @@ -235,23 +223,23 @@ module ActiveRecord # end # end # - # This way, the +before_destroy+ gets executed before the <tt>dependent: destroy</tt> is called, and the data is still available. + # This way, the +before_destroy+ gets executed before the <tt>dependent: :destroy</tt> is called, and the data is still available. # - # == Transactions + # == \Transactions # - # The entire callback chain of a +save+, <tt>save!</tt>, or +destroy+ call runs - # within a transaction. That includes <tt>after_*</tt> hooks. If everything - # goes fine a COMMIT is executed once the chain has been completed. + # The entire callback chain of a {#save}[rdoc-ref:Persistence#save], {#save!}[rdoc-ref:Persistence#save!], + # or {#destroy}[rdoc-ref:Persistence#destroy] call runs within a transaction. That includes <tt>after_*</tt> hooks. + # If everything goes fine a COMMIT is executed once the chain has been completed. # # If a <tt>before_*</tt> callback cancels the action a ROLLBACK is issued. You # can also trigger a ROLLBACK raising an exception in any of the callbacks, # including <tt>after_*</tt> hooks. Note, however, that in that case the client - # needs to be aware of it because an ordinary +save+ will raise such exception + # needs to be aware of it because an ordinary {#save}[rdoc-ref:Persistence#save] will raise such exception # instead of quietly returning +false+. # # == Debugging callbacks # - # The callback chain is accessible via the <tt>_*_callbacks</tt> method on an object. ActiveModel Callbacks support + # The callback chain is accessible via the <tt>_*_callbacks</tt> method on an object. Active Model \Callbacks support # <tt>:before</tt>, <tt>:after</tt> and <tt>:around</tt> as values for the <tt>kind</tt> property. The <tt>kind</tt> property # defines what part of the chain the callback runs in. # @@ -277,7 +265,7 @@ module ActiveRecord :before_destroy, :around_destroy, :after_destroy, :after_commit, :after_rollback ] - module ClassMethods + module ClassMethods # :nodoc: include ActiveModel::Callbacks end @@ -289,24 +277,33 @@ module ActiveRecord end def destroy #:nodoc: - run_callbacks(:destroy) { super } + @_destroy_callback_already_called ||= false + return if @_destroy_callback_already_called + @_destroy_callback_already_called = true + _run_destroy_callbacks { super } + rescue RecordNotDestroyed => e + @_association_destroy_exception = e + false + ensure + @_destroy_callback_already_called = false end def touch(*) #:nodoc: - run_callbacks(:touch) { super } + _run_touch_callbacks { super } end private + def create_or_update(*) #:nodoc: - run_callbacks(:save) { super } + _run_save_callbacks { super } end def _create_record #:nodoc: - run_callbacks(:create) { super } + _run_create_callbacks { super } end def _update_record(*) #:nodoc: - run_callbacks(:update) { super } + _run_update_callbacks { super } end end end diff --git a/activerecord/lib/active_record/coders/yaml_column.rb b/activerecord/lib/active_record/coders/yaml_column.rb index 9ea22ed798..2456b8ad8c 100644 --- a/activerecord/lib/active_record/coders/yaml_column.rb +++ b/activerecord/lib/active_record/coders/yaml_column.rb @@ -14,10 +14,7 @@ module ActiveRecord def dump(obj) return if obj.nil? - unless obj.is_a?(object_class) - raise SerializationTypeMismatch, - "Attribute was supposed to be a #{object_class}, but was a #{obj.class}. -- #{obj.inspect}" - end + assert_valid_value(obj) YAML.dump obj end @@ -26,15 +23,19 @@ module ActiveRecord return yaml unless yaml.is_a?(String) && yaml =~ /^---/ obj = YAML.load(yaml) - unless obj.is_a?(object_class) || obj.nil? - raise SerializationTypeMismatch, - "Attribute was supposed to be a #{object_class}, but was a #{obj.class}" - end + assert_valid_value(obj) obj ||= object_class.new if object_class != Object obj end + def assert_valid_value(obj) + unless obj.nil? || obj.is_a?(object_class) + raise SerializationTypeMismatch, + "Attribute was supposed to be a #{object_class}, but was a #{obj.class}. -- #{obj.inspect}" + end + end + private def check_arity_of_constructor diff --git a/activerecord/lib/active_record/collection_cache_key.rb b/activerecord/lib/active_record/collection_cache_key.rb new file mode 100644 index 0000000000..3c4ca3d116 --- /dev/null +++ b/activerecord/lib/active_record/collection_cache_key.rb @@ -0,0 +1,31 @@ +module ActiveRecord + module CollectionCacheKey + + def collection_cache_key(collection = all, timestamp_column = :updated_at) # :nodoc: + query_signature = Digest::MD5.hexdigest(collection.to_sql) + key = "#{collection.model_name.cache_key}/query-#{query_signature}" + + if collection.loaded? + size = collection.size + timestamp = collection.max_by(×tamp_column).public_send(timestamp_column) + else + column_type = type_for_attribute(timestamp_column.to_s) + column = "#{connection.quote_table_name(collection.table_name)}.#{connection.quote_column_name(timestamp_column)}" + + query = collection + .select("COUNT(*) AS size", "MAX(#{column}) AS timestamp") + .unscope(:order) + result = connection.select_one(query) + + size = result["size"] + timestamp = column_type.deserialize(result["timestamp"]) + end + + if timestamp + "#{key}-#{size}-#{timestamp.utc.to_s(cache_timestamp_format)}" + else + "#{key}-#{size}" + end + end + end +end diff --git a/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb b/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb index 6535121075..ccd2899489 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb @@ -1,5 +1,5 @@ require 'thread' -require 'thread_safe' +require 'concurrent/map' require 'monitor' module ActiveRecord @@ -10,8 +10,9 @@ module ActiveRecord end # Raised when a pool was unable to get ahold of all its connections - # to perform a "group" action such as +ConnectionPool#disconnect!+ - # or +ConnectionPool#clear_reloadable_connections!+. + # to perform a "group" action such as + # {ActiveRecord::Base.connection_pool.disconnect!}[rdoc-ref:ConnectionAdapters::ConnectionPool#disconnect!] + # or {ActiveRecord::Base.clear_reloadable_connections!}[rdoc-ref:ConnectionAdapters::ConnectionHandler#clear_reloadable_connections!]. class ExclusiveConnectionTimeoutError < ConnectionTimeoutError end @@ -37,17 +38,18 @@ module ActiveRecord # Connections can be obtained and used from a connection pool in several # ways: # - # 1. Simply use ActiveRecord::Base.connection as with Active Record 2.1 and + # 1. Simply use {ActiveRecord::Base.connection}[rdoc-ref:ConnectionHandling.connection] + # as with Active Record 2.1 and # earlier (pre-connection-pooling). Eventually, when you're done with # the connection(s) and wish it to be returned to the pool, you call - # ActiveRecord::Base.clear_active_connections!. This will be the - # default behavior for Active Record when used in conjunction with + # {ActiveRecord::Base.clear_active_connections!}[rdoc-ref:ConnectionAdapters::ConnectionHandler#clear_active_connections!]. + # This will be the default behavior for Active Record when used in conjunction with # Action Pack's request handling cycle. # 2. Manually check out a connection from the pool with - # ActiveRecord::Base.connection_pool.checkout. You are responsible for + # {ActiveRecord::Base.connection_pool.checkout}[rdoc-ref:#checkout]. You are responsible for # returning this connection to the pool when finished by calling - # ActiveRecord::Base.connection_pool.checkin(connection). - # 3. Use ActiveRecord::Base.connection_pool.with_connection(&block), which + # {ActiveRecord::Base.connection_pool.checkin(connection)}[rdoc-ref:#checkin]. + # 3. Use {ActiveRecord::Base.connection_pool.with_connection(&block)}[rdoc-ref:#with_connection], which # obtains a connection, yields it as the sole argument to the block, # and returns it to the pool after the block completes. # @@ -140,7 +142,7 @@ module ActiveRecord # become available. # # Raises: - # - ConnectionTimeoutError if +timeout+ is given and no element + # - ActiveRecord::ConnectionTimeoutError if +timeout+ is given and no element # becomes available within +timeout+ seconds, def poll(timeout = nil) synchronize { internal_poll(timeout) } @@ -195,7 +197,7 @@ module ActiveRecord elapsed = Time.now - t0 if elapsed >= timeout - msg = 'could not obtain a database connection within %0.3f seconds (waited %0.3f seconds)' % + msg = 'could not obtain a connection from the pool within %0.3f seconds (waited %0.3f seconds); all pooled connections were in use' % [timeout, elapsed] raise ConnectionTimeoutError, msg end @@ -331,18 +333,18 @@ module ActiveRecord # of the cache is to speed-up +connection+ method, it is not the authoritative # registry of which thread owns which connection, that is tracked by # +connection.owner+ attr on each +connection+ instance. - # The invariant works like this: if there is mapping of +thread => conn+, + # The invariant works like this: if there is mapping of <tt>thread => conn</tt>, # then that +thread+ does indeed own that +conn+, however an absence of a such # mapping does not mean that the +thread+ doesn't own the said connection, in # that case +conn.owner+ attr should be consulted. # Access and modification of +@thread_cached_conns+ does not require # synchronization. - @thread_cached_conns = ThreadSafe::Cache.new(:initial_capacity => @size) + @thread_cached_conns = Concurrent::Map.new(:initial_capacity => @size) @connections = [] @automatic_reconnect = true - # Connection pool allows for concurrent (outside the main `synchronize` section) + # Connection pool allows for concurrent (outside the main +synchronize+ section) # establishment of new connections. This variable tracks the number of threads # currently in the process of independently establishing connections to the DB. @now_connecting = 0 @@ -364,7 +366,7 @@ module ActiveRecord # Is there an open connection that is being used for the current thread? # - # This method only works for connections that have been abtained through + # This method only works for connections that have been obtained through # #connection or #with_connection methods, connections obtained through # #checkout will not be detected by #active_connection? def active_connection? @@ -406,9 +408,9 @@ module ActiveRecord # Disconnects all connections in the pool, and clears the pool. # # Raises: - # - +ExclusiveConnectionTimeoutError+ if unable to gain ownership of all + # - ActiveRecord::ExclusiveConnectionTimeoutError if unable to gain ownership of all # connections in the pool within a timeout interval (default duration is - # +spec.config[:checkout_timeout] * 2+ seconds). + # <tt>spec.config[:checkout_timeout] * 2</tt> seconds). def disconnect(raise_on_acquisition_timeout = true) with_exclusively_acquired_all_connections(raise_on_acquisition_timeout) do synchronize do @@ -426,8 +428,8 @@ module ActiveRecord # # The pool first tries to gain ownership of all connections, if unable to # do so within a timeout interval (default duration is - # +spec.config[:checkout_timeout] * 2+ seconds), the pool is forcefully - # disconneted wihout any regard for other connection owning threads. + # <tt>spec.config[:checkout_timeout] * 2</tt> seconds), the pool is forcefully + # disconnected without any regard for other connection owning threads. def disconnect! disconnect(false) end @@ -436,9 +438,9 @@ module ActiveRecord # require reloading. # # Raises: - # - +ExclusiveConnectionTimeoutError+ if unable to gain ownership of all + # - ActiveRecord::ExclusiveConnectionTimeoutError if unable to gain ownership of all # connections in the pool within a timeout interval (default duration is - # +spec.config[:checkout_timeout] * 2+ seconds). + # <tt>spec.config[:checkout_timeout] * 2</tt> seconds). def clear_reloadable_connections(raise_on_acquisition_timeout = true) num_new_conns_required = 0 @@ -474,7 +476,7 @@ module ActiveRecord # # The pool first tries to gain ownership of all connections, if unable to # do so within a timeout interval (default duration is - # +spec.config[:checkout_timeout] * 2+ seconds), the pool forcefully + # <tt>spec.config[:checkout_timeout] * 2</tt> seconds), the pool forcefully # clears the cache and reloads connections without any regard for other # connection owning threads. def clear_reloadable_connections! @@ -494,7 +496,7 @@ module ActiveRecord # Returns: an AbstractAdapter object. # # Raises: - # - ConnectionTimeoutError: no connection can be obtained from the pool. + # - ActiveRecord::ConnectionTimeoutError no connection can be obtained from the pool. def checkout(checkout_timeout = @checkout_timeout) checkout_and_verify(acquire_connection(checkout_timeout)) end @@ -503,12 +505,12 @@ module ActiveRecord # no longer need this connection. # # +conn+: an AbstractAdapter object, which was obtained by earlier by - # calling +checkout+ on this pool. + # calling #checkout on this pool. def checkin(conn) synchronize do remove_connection_from_thread_cache conn - conn.run_callbacks :checkin do + conn._run_checkin_callbacks do conn.expire end @@ -516,7 +518,7 @@ module ActiveRecord end end - # Remove a connection from the connection pool. The connection will + # Remove a connection from the connection pool. The connection will # remain open and active but will no longer be managed by this pool. def remove(conn) needs_new_connection = false @@ -547,7 +549,7 @@ module ActiveRecord bulk_make_new_connections(1) if needs_new_connection end - # Recover lost connections for the pool. A lost connection can occur if + # Recover lost connections for the pool. A lost connection can occur if # a programmer forgets to checkin a connection at the end of a thread # or a thread dies unexpectedly. def reap @@ -587,7 +589,7 @@ module ActiveRecord end #-- - # From the discussion on Github: + # From the discussion on GitHub: # https://github.com/rails/rails/pull/14938#commitcomment-6601951 # This hook-in method allows for easier monkey-patching fixes needed by # JRuby users that use Fibers. @@ -628,10 +630,10 @@ module ActiveRecord end end rescue ExclusiveConnectionTimeoutError - # `raise_on_acquisition_timeout == false` means we are directed to ignore any + # <tt>raise_on_acquisition_timeout == false</tt> means we are directed to ignore any # timeouts and are expected to just give up: we've obtained as many connections # as possible, note that in a case like that we don't return any of the - # `newly_checked_out` connections. + # +newly_checked_out+ connections. if raise_on_acquisition_timeout release_newly_checked_out = true @@ -688,18 +690,18 @@ module ActiveRecord # queue for a connection to become available. # # Raises: - # - ConnectionTimeoutError if a connection could not be acquired + # - ActiveRecord::ConnectionTimeoutError if a connection could not be acquired # #-- # Implementation detail: the connection returned by +acquire_connection+ # will already be "+connection.lease+ -ed" to the current thread. def acquire_connection(checkout_timeout) - # NOTE: we rely on `@available.poll` and `try_to_checkout_new_connection` to - # `conn.lease` the returned connection (and to do this in a `synchronized` + # NOTE: we rely on +@available.poll+ and +try_to_checkout_new_connection+ to + # +conn.lease+ the returned connection (and to do this in a +synchronized+ # section), this is not the cleanest implementation, as ideally we would - # `synchronize { conn.lease }` in this method, but by leaving it to `@available.poll` - # and `try_to_checkout_new_connection` we can piggyback on `synchronize` sections - # of the said methods and avoid an additional `synchronize` overhead. + # <tt>synchronize { conn.lease }</tt> in this method, but by leaving it to +@available.poll+ + # and +try_to_checkout_new_connection+ we can piggyback on +synchronize+ sections + # of the said methods and avoid an additional +synchronize+ overhead. if conn = @available.poll || try_to_checkout_new_connection conn else @@ -764,7 +766,7 @@ module ActiveRecord end def checkout_and_verify(c) - c.run_callbacks :checkout do + c._run_checkout_callbacks do c.verify! end c @@ -824,11 +826,11 @@ module ActiveRecord # These caches are keyed by klass.name, NOT klass. Keying them by klass # alone would lead to memory leaks in development mode as all previous # instances of the class would stay in memory. - @owner_to_pool = ThreadSafe::Cache.new(:initial_capacity => 2) do |h,k| - h[k] = ThreadSafe::Cache.new(:initial_capacity => 2) + @owner_to_pool = Concurrent::Map.new(:initial_capacity => 2) do |h,k| + h[k] = Concurrent::Map.new(:initial_capacity => 2) end - @class_to_pool = ThreadSafe::Cache.new(:initial_capacity => 2) do |h,k| - h[k] = ThreadSafe::Cache.new + @class_to_pool = Concurrent::Map.new(:initial_capacity => 2) do |h,k| + h[k] = Concurrent::Map.new end end @@ -857,6 +859,8 @@ module ActiveRecord end # Clears the cache which maps classes. + # + # See ConnectionPool#clear_reloadable_connections! for details. def clear_reloadable_connections! connection_pool_list.each(&:clear_reloadable_connections!) end @@ -956,12 +960,11 @@ module ActiveRecord def call(env) testing = env['rack.test'] - response = @app.call(env) - response[2] = ::Rack::BodyProxy.new(response[2]) do + status, headers, body = @app.call(env) + proxy = ::Rack::BodyProxy.new(body) do ActiveRecord::Base.clear_active_connections! unless testing end - - response + [status, headers, proxy] rescue Exception ActiveRecord::Base.clear_active_connections! unless testing raise diff --git a/activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb b/activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb index 30b2fca2ca..6711049588 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb @@ -19,8 +19,8 @@ module ActiveRecord # Returns the maximum allowed length for an index name. This # limit is enforced by \Rails and is less than or equal to - # <tt>index_name_length</tt>. The gap between - # <tt>index_name_length</tt> is to allow internal \Rails + # #index_name_length. The gap between + # #index_name_length is to allow internal \Rails # operations to use prefixes in temporary operations. def allowed_index_name_length index_name_length diff --git a/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb b/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb index 38dd9578fe..7a2a1a0e33 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb @@ -29,7 +29,17 @@ module ActiveRecord # Returns an ActiveRecord::Result instance. def select_all(arel, name = nil, binds = []) arel, binds = binds_from_relation arel, binds - select(to_sql(arel, binds), name, binds) + sql = to_sql(arel, binds) + if arel.is_a?(String) + preparable = false + else + preparable = visitor.preparable + end + if prepared_statements && preparable + select_prepared(sql, name, binds) + else + select(sql, name, binds) + end end # Returns a record hash with the column names as keys and column values @@ -48,8 +58,8 @@ module ActiveRecord # Returns an array of the values of the first column in a select: # select_values("SELECT id FROM companies LIMIT 3") => [1,2,3] - def select_values(arel, name = nil) - arel, binds = binds_from_relation arel, [] + def select_values(arel, name = nil, binds = []) + arel, binds = binds_from_relation arel, binds select_rows(to_sql(arel, binds), name, binds).map(&:first) end @@ -67,7 +77,7 @@ module ActiveRecord # Executes +sql+ statement in the context of this connection using # +binds+ as the bind substitutes. +name+ is logged along with # the executed +sql+ statement. - def exec_query(sql, name = 'SQL', binds = []) + def exec_query(sql, name = 'SQL', binds = [], prepare: false) end # Executes insert +sql+ statement in the context of this connection using @@ -96,7 +106,7 @@ module ActiveRecord exec_query(sql, name, binds) end - # Returns the last auto-generated ID from the affected table. + # Executes an INSERT query and returns the new record's ID # # +id_value+ will be returned unless the value is nil, in # which case the database will attempt to calculate the last inserted @@ -105,20 +115,24 @@ module ActiveRecord # If the next id was calculated in advance (as in Oracle), it should be # passed in as +id_value+. def insert(arel, name = nil, pk = nil, id_value = nil, sequence_name = nil, binds = []) - sql, binds = sql_for_insert(to_sql(arel, binds), pk, id_value, sequence_name, binds) - value = exec_insert(sql, name, binds, pk, sequence_name) + sql, binds, pk, sequence_name = sql_for_insert(to_sql(arel, binds), pk, id_value, sequence_name, binds) + value = exec_insert(sql, name, binds, pk, sequence_name) id_value || last_inserted_id(value) end + alias create insert + alias insert_sql insert # Executes the update statement and returns the number of rows affected. def update(arel, name = nil, binds = []) exec_update(to_sql(arel, binds), name, binds) end + alias update_sql update # Executes the delete statement and returns the number of rows affected. def delete(arel, name = nil, binds = []) exec_delete(to_sql(arel, binds), name, binds) end + alias delete_sql delete # Returns +true+ when the connection adapter supports prepared statement # caching, otherwise returns +false+ @@ -137,7 +151,7 @@ module ActiveRecord # # In order to get around this problem, #transaction will emulate the effect # of nested transactions, by using savepoints: - # http://dev.mysql.com/doc/refman/5.6/en/savepoint.html + # http://dev.mysql.com/doc/refman/5.7/en/savepoint.html # Savepoints are supported by MySQL and PostgreSQL. SQLite3 version >= '3.6.8' # supports savepoints. # @@ -190,15 +204,15 @@ module ActiveRecord # semantics of these different levels: # # * http://www.postgresql.org/docs/current/static/transaction-iso.html - # * https://dev.mysql.com/doc/refman/5.6/en/set-transaction.html + # * https://dev.mysql.com/doc/refman/5.7/en/set-transaction.html # - # An <tt>ActiveRecord::TransactionIsolationError</tt> will be raised if: + # An ActiveRecord::TransactionIsolationError will be raised if: # # * The adapter does not support setting the isolation level # * You are joining an existing open transaction # * You are creating a nested (savepoint) transaction # - # The mysql, mysql2 and postgresql adapters support setting the transaction + # The mysql2 and postgresql adapters support setting the transaction # isolation level. However, support is disabled for MySQL versions below 5, # because they are affected by a bug[http://bugs.mysql.com/bug.php?id=39170] # which means the isolation level gets persisted outside the transaction. @@ -286,11 +300,16 @@ module ActiveRecord # Inserts the given fixture into the table. Overridden in adapters that require # something beyond a simple insert (eg. Oracle). def insert_fixture(fixture, table_name) - columns = schema_cache.columns_hash(table_name) + fixture = fixture.stringify_keys + columns = schema_cache.columns_hash(table_name) binds = fixture.map do |name, value| - type = lookup_cast_type_from_column(columns[name]) - Relation::QueryAttribute.new(name, value, type) + if column = columns[name] + type = lookup_cast_type_from_column(column) + Relation::QueryAttribute.new(name, value, type) + else + raise Fixture::FixtureError, %(table "#{table_name}" has no column named #{name.inspect}.) + end end key_list = fixture.keys.map { |name| quote_column_name(name) } value_list = prepare_binds_for_database(binds).map do |value| @@ -330,18 +349,12 @@ module ActiveRecord # The default strategy for an UPDATE with joins is to use a subquery. This doesn't work # on MySQL (even when aliasing the tables), but MySQL allows using JOIN directly in # an UPDATE statement, so in the MySQL adapters we redefine this to do that. - def join_to_update(update, select) #:nodoc: - key = update.key + def join_to_update(update, select, key) # :nodoc: subselect = subquery_for(key, select) update.where key.in(subselect) end - - def join_to_delete(delete, select, key) #:nodoc: - subselect = subquery_for(key, select) - - delete.where key.in(subselect) - end + alias join_to_delete join_to_update protected @@ -354,28 +367,15 @@ module ActiveRecord # Returns an ActiveRecord::Result instance. def select(sql, name = nil, binds = []) - exec_query(sql, name, binds) - end - - - # Returns the last auto-generated ID from the affected table. - def insert_sql(sql, name = nil, pk = nil, id_value = nil, sequence_name = nil) - execute(sql, name) - id_value - end - - # Executes the update statement and returns the number of rows affected. - def update_sql(sql, name = nil) - execute(sql, name) + exec_query(sql, name, binds, prepare: false) end - # Executes the delete statement and returns the number of rows affected. - def delete_sql(sql, name = nil) - update_sql(sql, name) + def select_prepared(sql, name = nil, binds = []) + exec_query(sql, name, binds, prepare: true) end def sql_for_insert(sql, pk, id_value, sequence_name, binds) - [sql, binds] + [sql, binds, pk, sequence_name] end def last_inserted_id(result) diff --git a/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb b/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb index 2c7409b2dc..7e3760d34b 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb @@ -43,9 +43,9 @@ module ActiveRecord # If you are having to call this function, you are likely doing something # wrong. The column does not have sufficient type information if the user # provided a custom type on the class level either explicitly (via - # `attribute`) or implicitly (via `serialize`, - # `time_zone_aware_attributes`). In almost all cases, the sql type should - # only be used to change quoting behavior, when the primitive to + # Attributes::ClassMethods#attribute) or implicitly (via + # AttributeMethods::Serialization::ClassMethods#serialize, +time_zone_aware_attributes+). + # In almost all cases, the sql type should only be used to change quoting behavior, when the primitive to # represent the type doesn't sufficiently reflect the differences # (varchar vs binary) for example. The type used to get this primitive # should have been provided before reaching the connection adapter. @@ -58,7 +58,7 @@ module ActiveRecord end end - # See docs for +type_cast_from_column+ + # See docs for #type_cast_from_column def lookup_cast_type_from_column(column) # :nodoc: lookup_cast_type(column.sql_type) end @@ -93,7 +93,7 @@ module ActiveRecord # Override to return the quoted table name for assignment. Defaults to # table quoting. # - # This works for mysql and mysql2 where table.column can be used to + # This works for mysql2 where table.column can be used to # resolve ambiguity. # # We override this in the sqlite3 and postgresql adapters to use only @@ -102,9 +102,13 @@ module ActiveRecord quote_table_name("#{table}.#{attr}") end - def quote_default_expression(value, column) #:nodoc: - value = lookup_cast_type(column.sql_type).serialize(value) - quote(value) + def quote_default_expression(value, column) # :nodoc: + if value.is_a?(Proc) + value.call + else + value = lookup_cast_type(column.sql_type).serialize(value) + quote(value) + end end def quoted_true diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_creation.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_creation.rb index 18d943f452..0ba4d94e3c 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/schema_creation.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_creation.rb @@ -14,8 +14,10 @@ module ActiveRecord send m, o end - delegate :quote_column_name, :quote_table_name, :quote_default_expression, :type_to_sql, to: :@conn - private :quote_column_name, :quote_table_name, :quote_default_expression, :type_to_sql + delegate :quote_column_name, :quote_table_name, :quote_default_expression, :type_to_sql, + :options_include_default?, :supports_indexes_in_create?, :supports_foreign_keys?, :foreign_key_options, to: :@conn + private :quote_column_name, :quote_table_name, :quote_default_expression, :type_to_sql, + :options_include_default?, :supports_indexes_in_create?, :supports_foreign_keys?, :foreign_key_options private @@ -38,17 +40,32 @@ module ActiveRecord end def visit_TableDefinition(o) - create_sql = "CREATE#{' TEMPORARY' if o.temporary} TABLE " - create_sql << "#{quote_table_name(o.name)} " - create_sql << "(#{o.columns.map { |c| accept c }.join(', ')}) " unless o.as + create_sql = "CREATE#{' TEMPORARY' if o.temporary} TABLE #{quote_table_name(o.name)} " + + statements = o.columns.map { |c| accept c } + statements << accept(o.primary_keys) if o.primary_keys + + if supports_indexes_in_create? + statements.concat(o.indexes.map { |column_name, options| index_in_create(o.name, column_name, options) }) + end + + if supports_foreign_keys? + statements.concat(o.foreign_keys.map { |to_table, options| foreign_key_in_create(o.name, to_table, options) }) + end + + create_sql << "(#{statements.join(', ')}) " if statements.present? create_sql << "#{o.options}" create_sql << " AS #{@conn.to_sql(o.as)}" if o.as create_sql end - def visit_AddForeignKey(o) + def visit_PrimaryKeyDefinition(o) + "PRIMARY KEY (#{o.name.join(', ')})" + end + + def visit_ForeignKeyDefinition(o) sql = <<-SQL.strip_heredoc - ADD CONSTRAINT #{quote_column_name(o.name)} + CONSTRAINT #{quote_column_name(o.name)} FOREIGN KEY (#{quote_column_name(o.column)}) REFERENCES #{quote_table_name(o.to_table)} (#{quote_column_name(o.primary_key)}) SQL @@ -57,6 +74,10 @@ module ActiveRecord sql end + def visit_AddForeignKey(o) + "ADD #{accept(o)}" + end + def visit_DropForeignKey(name) "DROP CONSTRAINT #{quote_column_name(name)}" end @@ -89,8 +110,9 @@ module ActiveRecord sql end - def options_include_default?(options) - options.include?(:default) && !(options[:null] == false && options[:default].nil?) + def foreign_key_in_create(from_table, to_table, options) + options = foreign_key_options(from_table, to_table, options) + accept ForeignKeyDefinition.new(from_table, to_table, options) end def action_sql(action, dependency) diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb index 158b773e11..1cda23dc1d 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb @@ -23,6 +23,9 @@ module ActiveRecord class ChangeColumnDefinition < Struct.new(:column, :name) #:nodoc: end + class PrimaryKeyDefinition < Struct.new(:name) # :nodoc: + end + class ForeignKeyDefinition < Struct.new(:from_table, :to_table, :options) #:nodoc: def name options[:name] @@ -120,23 +123,29 @@ module ActiveRecord end def foreign_key_options - as_options(foreign_key) + as_options(foreign_key).merge(column: column_name) end def columns - result = [["#{name}_id", type, options]] + result = [[column_name, type, options]] if polymorphic result.unshift(["#{name}_type", :string, polymorphic_options]) end result end + def column_name + "#{name}_id" + end + def column_names columns.map(&:first) end def foreign_table_name - Base.pluralize_table_names ? name.to_s.pluralize : name + foreign_key_options.fetch(:to_table) do + Base.pluralize_table_names ? name.to_s.pluralize : name + end end end @@ -178,10 +187,10 @@ module ActiveRecord # Represents the schema of an SQL table in an abstract way. This class # provides methods for manipulating the schema representation. # - # Inside migration files, the +t+ object in +create_table+ + # Inside migration files, the +t+ object in {create_table}[rdoc-ref:SchemaStatements#create_table] # is actually of this type: # - # class SomeMigration < ActiveRecord::Migration + # class SomeMigration < ActiveRecord::Migration[5.0] # def up # create_table :foo do |t| # puts t.class # => "ActiveRecord::ConnectionAdapters::TableDefinition" @@ -193,27 +202,29 @@ module ActiveRecord # end # end # - # The table definitions - # The Columns are stored as a ColumnDefinition in the +columns+ attribute. class TableDefinition include ColumnMethods - # An array of ColumnDefinition objects, representing the column changes - # that have been defined. attr_accessor :indexes attr_reader :name, :temporary, :options, :as, :foreign_keys - def initialize(types, name, temporary, options, as = nil) + def initialize(name, temporary, options, as = nil) @columns_hash = {} @indexes = {} @foreign_keys = {} - @native = types + @primary_keys = nil @temporary = temporary @options = options @as = as @name = name end + def primary_keys(name = nil) # :nodoc: + @primary_keys = PrimaryKeyDefinition.new(name) if name + @primary_keys + end + + # Returns an array of ColumnDefinition objects for the columns of the table. def columns; @columns_hash.values; end # Returns a ColumnDefinition for the column with name +name+. @@ -222,90 +233,23 @@ module ActiveRecord end # Instantiates a new column for the table. - # The +type+ parameter is normally one of the migrations native types, - # which is one of the following: - # <tt>:primary_key</tt>, <tt>:string</tt>, <tt>:text</tt>, - # <tt>:integer</tt>, <tt>:bigint</tt>, <tt>:float</tt>, <tt>:decimal</tt>, - # <tt>:datetime</tt>, <tt>:time</tt>, <tt>:date</tt>, - # <tt>:binary</tt>, <tt>:boolean</tt>. - # - # You may use a type not in this list as long as it is supported by your - # database (for example, "polygon" in MySQL), but this will not be database - # agnostic and should usually be avoided. - # - # Available options are (none of these exists by default): - # * <tt>:limit</tt> - - # Requests a maximum column length. This is number of characters for <tt>:string</tt> and - # <tt>:text</tt> columns and number of bytes for <tt>:binary</tt> and <tt>:integer</tt> columns. - # * <tt>:default</tt> - - # The column's default value. Use nil for NULL. - # * <tt>:null</tt> - - # Allows or disallows +NULL+ values in the column. This option could - # have been named <tt>:null_allowed</tt>. - # * <tt>:precision</tt> - - # Specifies the precision for a <tt>:decimal</tt> column. - # * <tt>:scale</tt> - - # Specifies the scale for a <tt>:decimal</tt> column. + # See {connection.add_column}[rdoc-ref:ConnectionAdapters::SchemaStatements#add_column] + # for available options. + # + # Additional options are: # * <tt>:index</tt> - # Create an index for the column. Can be either <tt>true</tt> or an options hash. # - # Note: The precision is the total number of significant digits - # and the scale is the number of digits that can be stored following - # the decimal point. For example, the number 123.45 has a precision of 5 - # and a scale of 2. A decimal with a precision of 5 and a scale of 2 can - # range from -999.99 to 999.99. - # - # Please be aware of different RDBMS implementations behavior with - # <tt>:decimal</tt> columns: - # * The SQL standard says the default scale should be 0, <tt>:scale</tt> <= - # <tt>:precision</tt>, and makes no comments about the requirements of - # <tt>:precision</tt>. - # * MySQL: <tt>:precision</tt> [1..63], <tt>:scale</tt> [0..30]. - # Default is (10,0). - # * PostgreSQL: <tt>:precision</tt> [1..infinity], - # <tt>:scale</tt> [0..infinity]. No default. - # * SQLite2: Any <tt>:precision</tt> and <tt>:scale</tt> may be used. - # Internal storage as strings. No default. - # * SQLite3: No restrictions on <tt>:precision</tt> and <tt>:scale</tt>, - # but the maximum supported <tt>:precision</tt> is 16. No default. - # * Oracle: <tt>:precision</tt> [1..38], <tt>:scale</tt> [-84..127]. - # Default is (38,0). - # * DB2: <tt>:precision</tt> [1..63], <tt>:scale</tt> [0..62]. - # Default unknown. - # * SqlServer?: <tt>:precision</tt> [1..38], <tt>:scale</tt> [0..38]. - # Default (38,0). - # # This method returns <tt>self</tt>. # # == Examples - # # Assuming +td+ is an instance of TableDefinition - # td.column(:granted, :boolean) - # # granted BOOLEAN - # - # td.column(:picture, :binary, limit: 2.megabytes) - # # => picture BLOB(2097152) # - # td.column(:sales_stage, :string, limit: 20, default: 'new', null: false) - # # => sales_stage VARCHAR(20) DEFAULT 'new' NOT NULL - # - # td.column(:bill_gates_money, :decimal, precision: 15, scale: 2) - # # => bill_gates_money DECIMAL(15,2) - # - # td.column(:sensor_reading, :decimal, precision: 30, scale: 20) - # # => sensor_reading DECIMAL(30,20) - # - # # While <tt>:scale</tt> defaults to zero on most databases, it - # # probably wouldn't hurt to include it. - # td.column(:huge_integer, :decimal, precision: 30) - # # => huge_integer DECIMAL(30) - # - # # Defines a column with a database-specific type. - # td.column(:foo, 'polygon') - # # => foo polygon + # # Assuming +td+ is an instance of TableDefinition + # td.column(:granted, :boolean, index: true) # # == Short-hand examples # - # Instead of calling +column+ directly, you can also work with the short-hand definitions for the default types. + # Instead of calling #column directly, you can also work with the short-hand definitions for the default types. # They use the type as the method name instead of as a parameter and allow for multiple columns to be defined # in a single statement. # @@ -337,7 +281,8 @@ module ActiveRecord # TableDefinition#references will add an appropriately-named _id column, plus a corresponding _type # column if the <tt>:polymorphic</tt> option is supplied. If <tt>:polymorphic</tt> is a hash of # options, these will be used when creating the <tt>_type</tt> column. The <tt>:index</tt> option - # will also create an index, similar to calling <tt>add_index</tt>. So what can be written like this: + # will also create an index, similar to calling {add_index}[rdoc-ref:ConnectionAdapters::SchemaStatements#add_index]. + # So what can be written like this: # # create_table :taggings do |t| # t.integer :tag_id, :tagger_id, :taggable_id @@ -369,6 +314,8 @@ module ActiveRecord self end + # remove the column +name+ from the table. + # remove_column(:account_id) def remove_column(name) @columns_hash.delete name.to_s end @@ -386,7 +333,7 @@ module ActiveRecord end # Appends <tt>:datetime</tt> columns <tt>:created_at</tt> and - # <tt>:updated_at</tt> to the table. See SchemaStatements#add_timestamps + # <tt>:updated_at</tt> to the table. See {connection.add_timestamps}[rdoc-ref:SchemaStatements#add_timestamps] # # t.timestamps null: false def timestamps(*args) @@ -403,7 +350,7 @@ module ActiveRecord # t.references(:user) # t.belongs_to(:supplier, foreign_key: true) # - # See SchemaStatements#add_reference for details of the options you can use. + # See {connection.add_reference}[rdoc-ref:SchemaStatements#add_reference] for details of the options you can use. def references(*args, **options) args.each do |col| ReferenceDefinition.new(col, **options).add_to(self) @@ -414,11 +361,8 @@ module ActiveRecord def new_column_definition(name, type, options) # :nodoc: type = aliased_types(type.to_s, type) column = create_column_definition name, type - limit = options.fetch(:limit) do - native[type][:limit] if native[type].is_a?(Hash) - end - column.limit = limit + column.limit = options[:limit] column.precision = options[:precision] column.scale = options[:scale] column.default = options[:default] @@ -436,10 +380,6 @@ module ActiveRecord ColumnDefinition.new name, type end - def native - @native - end - def aliased_types(name, fallback) 'timestamp' == name ? :datetime : fallback end @@ -475,7 +415,7 @@ module ActiveRecord end # Represents an SQL table in an abstract way for updating a table. - # Also see TableDefinition and SchemaStatements#create_table + # Also see TableDefinition and {connection.create_table}[rdoc-ref:SchemaStatements#create_table] # # Available transformations are: # @@ -532,7 +472,7 @@ module ActiveRecord # # t.string(:name) unless t.column_exists?(:name, :string) # - # See SchemaStatements#column_exists? + # See {connection.column_exists?}[rdoc-ref:SchemaStatements#column_exists?] def column_exists?(column_name, type = nil, options = {}) @base.column_exists?(name, column_name, type, options) end @@ -544,7 +484,7 @@ module ActiveRecord # t.index([:branch_id, :party_id], unique: true) # t.index([:branch_id, :party_id], unique: true, name: 'by_branch_party') # - # See SchemaStatements#add_index for details of the options you can use. + # See {connection.add_index}[rdoc-ref:SchemaStatements#add_index] for details of the options you can use. def index(column_name, options = {}) @base.add_index(name, column_name, options) end @@ -555,7 +495,7 @@ module ActiveRecord # t.index(:branch_id) # end # - # See SchemaStatements#index_exists? + # See {connection.index_exists?}[rdoc-ref:SchemaStatements#index_exists?] def index_exists?(column_name, options = {}) @base.index_exists?(name, column_name, options) end @@ -564,7 +504,7 @@ module ActiveRecord # # t.rename_index(:user_id, :account_id) # - # See SchemaStatements#rename_index + # See {connection.rename_index}[rdoc-ref:SchemaStatements#rename_index] def rename_index(index_name, new_index_name) @base.rename_index(name, index_name, new_index_name) end @@ -573,7 +513,7 @@ module ActiveRecord # # t.timestamps(null: false) # - # See SchemaStatements#add_timestamps + # See {connection.add_timestamps}[rdoc-ref:SchemaStatements#add_timestamps] def timestamps(options = {}) @base.add_timestamps(name, options) end @@ -592,10 +532,11 @@ module ActiveRecord # # t.change_default(:qualification, 'new') # t.change_default(:authorized, 1) + # t.change_default(:status, from: nil, to: "draft") # - # See SchemaStatements#change_column_default - def change_default(column_name, default) - @base.change_column_default(name, column_name, default) + # See {connection.change_column_default}[rdoc-ref:SchemaStatements#change_column_default] + def change_default(column_name, default_or_changes) + @base.change_column_default(name, column_name, default_or_changes) end # Removes the column(s) from the table definition. @@ -603,7 +544,7 @@ module ActiveRecord # t.remove(:qualification) # t.remove(:qualification, :experience) # - # See SchemaStatements#remove_columns + # See {connection.remove_columns}[rdoc-ref:SchemaStatements#remove_columns] def remove(*column_names) @base.remove_columns(name, *column_names) end @@ -614,7 +555,7 @@ module ActiveRecord # t.remove_index(column: [:branch_id, :party_id]) # t.remove_index(name: :by_branch_party) # - # See SchemaStatements#remove_index + # See {connection.remove_index}[rdoc-ref:SchemaStatements#remove_index] def remove_index(options = {}) @base.remove_index(name, options) end @@ -623,7 +564,7 @@ module ActiveRecord # # t.remove_timestamps # - # See SchemaStatements#remove_timestamps + # See {connection.remove_timestamps}[rdoc-ref:SchemaStatements#remove_timestamps] def remove_timestamps(options = {}) @base.remove_timestamps(name, options) end @@ -632,7 +573,7 @@ module ActiveRecord # # t.rename(:description, :name) # - # See SchemaStatements#rename_column + # See {connection.rename_column}[rdoc-ref:SchemaStatements#rename_column] def rename(column_name, new_column_name) @base.rename_column(name, column_name, new_column_name) end @@ -642,7 +583,7 @@ module ActiveRecord # t.references(:user) # t.belongs_to(:supplier, foreign_key: true) # - # See SchemaStatements#add_reference for details of the options you can use. + # See {connection.add_reference}[rdoc-ref:SchemaStatements#add_reference] for details of the options you can use. def references(*args) options = args.extract_options! args.each do |ref_name| @@ -656,7 +597,7 @@ module ActiveRecord # t.remove_references(:user) # t.remove_belongs_to(:supplier, polymorphic: true) # - # See SchemaStatements#remove_reference + # See {connection.remove_reference}[rdoc-ref:SchemaStatements#remove_reference] def remove_references(*args) options = args.extract_options! args.each do |ref_name| @@ -669,7 +610,7 @@ module ActiveRecord # # t.foreign_key(:authors) # - # See SchemaStatements#add_foreign_key + # See {connection.add_foreign_key}[rdoc-ref:SchemaStatements#add_foreign_key] def foreign_key(*args) # :nodoc: @base.add_foreign_key(name, *args) end @@ -678,15 +619,10 @@ module ActiveRecord # # t.foreign_key(:authors) unless t.foreign_key_exists?(:authors) # - # See SchemaStatements#foreign_key_exists? + # See {connection.foreign_key_exists?}[rdoc-ref:SchemaStatements#foreign_key_exists?] def foreign_key_exists?(*args) # :nodoc: @base.foreign_key_exists?(name, *args) end - - private - def native - @base.native_database_types - end end end end diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_dumper.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_dumper.rb index b944a8631c..a95109fdae 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/schema_dumper.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_dumper.rb @@ -18,9 +18,9 @@ module ActiveRecord spec.merge!(prepare_column_options(column).delete_if { |key, _| [:name, :type].include?(key) }) end - # This can be overridden on a Adapter level basis to support other + # This can be overridden on an Adapter level basis to support other # extended datatypes (Example: Adding an array option in the - # PostgreSQLAdapter) + # PostgreSQL::ColumnDumper) def prepare_column_options(column) spec = {} spec[:name] = column.name.inspect @@ -61,8 +61,8 @@ module ActiveRecord end def schema_limit(column) - limit = column.limit || native_database_types[column.type][:limit] - limit.inspect if limit + limit = column.limit + limit.inspect if limit && limit != native_database_types[column.type][:limit] end def schema_precision(column) @@ -76,11 +76,17 @@ module ActiveRecord def schema_default(column) type = lookup_cast_type_from_column(column) default = type.deserialize(column.default) - unless default.nil? + if default.nil? + schema_expression(column) + else type.type_cast_for_schema(default) end end + def schema_expression(column) + "-> { #{column.default_function.inspect} }" if column.default_function + end + def schema_collation(column) column.collation.inspect if column.collation end diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb index ed19819d63..70868ebd03 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb @@ -23,6 +23,25 @@ module ActiveRecord table_name[0...table_alias_length].tr('.', '_') end + # Returns the relation names useable to back Active Record models. + # For most adapters this means all #tables and #views. + def data_sources + tables | views + end + + # Checks to see if the data source +name+ exists on the database. + # + # data_source_exists?(:ebooks) + # + def data_source_exists?(name) + data_sources.include?(name.to_s) + end + + # Returns an array of table names defined in the database. + def tables(name = nil) + raise NotImplementedError, "#tables is not implemented" + end + # Checks to see if the table +table_name+ exists on the database. # # table_exists?(:developers) @@ -31,6 +50,19 @@ module ActiveRecord tables.include?(table_name.to_s) end + # Returns an array of view names defined in the database. + def views + raise NotImplementedError, "#views is not implemented" + end + + # Checks to see if the view +view_name+ exists on the database. + # + # view_exists?(:ebooks) + # + def view_exists?(view_name) + views.include?(view_name.to_s) + end + # Returns an array of indexes for the given table. # def indexes(table_name, name = nil) end @@ -50,11 +82,10 @@ module ActiveRecord # def index_exists?(table_name, column_name, options = {}) column_names = Array(column_name).map(&:to_s) - index_name = options.key?(:name) ? options[:name].to_s : index_name(table_name, column: column_names) checks = [] - checks << lambda { |i| i.name == index_name } checks << lambda { |i| i.columns == column_names } checks << lambda { |i| i.unique } if options[:unique] + checks << lambda { |i| i.name == options[:name].to_s } if options[:name] indexes(table_name).any? { |i| checks.all? { |check| check[i] } } end @@ -88,10 +119,16 @@ module ActiveRecord (!options.key?(:null) || c.null == options[:null]) } end + # Returns just a table's primary key + def primary_key(table_name) + pks = primary_keys(table_name) + pks.first if pks.one? + end + # Creates a new table with the name +table_name+. +table_name+ may either # be a String or a Symbol. # - # There are two ways to work with +create_table+. You can use the block + # There are two ways to work with #create_table. You can use the block # form or the regular form, like this: # # === Block form @@ -123,7 +160,7 @@ module ActiveRecord # The +options+ hash can include the following keys: # [<tt>:id</tt>] # Whether to automatically add a primary key column. Defaults to true. - # Join tables for +has_and_belongs_to_many+ should set it to false. + # Join tables for {ActiveRecord::Base.has_and_belongs_to_many}[rdoc-ref:Associations::ClassMethods#has_and_belongs_to_many] should set it to false. # # A Symbol can be used to specify the type of the generated primary key column. # [<tt>:primary_key</tt>] @@ -131,7 +168,8 @@ module ActiveRecord # Defaults to +id+. If <tt>:id</tt> is false this option is ignored. # # Note that Active Record models will automatically detect their - # primary key. This can be avoided by using +self.primary_key=+ on the model + # primary key. This can be avoided by using + # {self.primary_key=}[rdoc-ref:AttributeMethods::PrimaryKey::ClassMethods#primary_key=] on the model # to define the key explicitly. # # [<tt>:options</tt>] @@ -153,7 +191,7 @@ module ActiveRecord # generates: # # CREATE TABLE suppliers ( - # id int(11) DEFAULT NULL auto_increment PRIMARY KEY + # id int auto_increment PRIMARY KEY # ) ENGINE=InnoDB DEFAULT CHARSET=utf8 # # ====== Rename the primary key column @@ -165,7 +203,7 @@ module ActiveRecord # generates: # # CREATE TABLE objects ( - # guid int(11) DEFAULT NULL auto_increment PRIMARY KEY, + # guid int auto_increment PRIMARY KEY, # name varchar(80) # ) # @@ -215,12 +253,16 @@ module ActiveRecord Base.get_primary_key table_name.to_s.singularize end - td.primary_key pk, options.fetch(:id, :primary_key), options + if pk.is_a?(Array) + td.primary_keys pk + else + td.primary_key pk, options.fetch(:id, :primary_key), options + end end yield td if block_given? - if options[:force] && table_exists?(table_name) + if options[:force] && data_source_exists?(table_name) drop_table(table_name, options) end @@ -232,10 +274,6 @@ module ActiveRecord end end - td.foreign_keys.each_pair do |other_table_name, foreign_key_options| - add_foreign_key(table_name, other_table_name, foreign_key_options) - end - result end @@ -258,7 +296,7 @@ module ActiveRecord # Set to true to drop the table before creating it. # Defaults to false. # - # Note that +create_join_table+ does not create any indices by default; you can use + # Note that #create_join_table does not create any indices by default; you can use # its block form to do so yourself: # # create_join_table :products, :categories do |t| @@ -293,11 +331,11 @@ module ActiveRecord end # Drops the join table specified by the given arguments. - # See +create_join_table+ for details. + # See #create_join_table for details. # # Although this command ignores the block if one is given, it can be helpful # to provide one in a migration's +change+ method so it can be reverted. - # In that case, the block will be used by create_join_table. + # In that case, the block will be used by #create_join_table. def drop_join_table(table_1, table_2, options = {}) join_table_name = find_join_table_name(table_1, table_2, options) drop_table(join_table_name) @@ -315,7 +353,7 @@ module ActiveRecord # [<tt>:bulk</tt>] # Set this to true to make this a bulk alter query, such as # - # ALTER TABLE `users` ADD COLUMN age INT(11), ADD COLUMN birthdate DATETIME ... + # ALTER TABLE `users` ADD COLUMN age INT, ADD COLUMN birthdate DATETIME ... # # Defaults to false. # @@ -402,17 +440,86 @@ module ActiveRecord # # Although this command ignores most +options+ and the block if one is given, # it can be helpful to provide these in a migration's +change+ method so it can be reverted. - # In that case, +options+ and the block will be used by create_table. + # In that case, +options+ and the block will be used by #create_table. def drop_table(table_name, options = {}) execute "DROP TABLE#{' IF EXISTS' if options[:if_exists]} #{quote_table_name(table_name)}" end - # Adds a new column to the named table. - # See TableDefinition#column for details of the options you can use. - # - # Note: Not all options will be available, generally this command should - # ignore most of them. In favor of doing a low-level call to simply - # create a column. + # Add a new +type+ column named +column_name+ to +table_name+. + # + # The +type+ parameter is normally one of the migrations native types, + # which is one of the following: + # <tt>:primary_key</tt>, <tt>:string</tt>, <tt>:text</tt>, + # <tt>:integer</tt>, <tt>:bigint</tt>, <tt>:float</tt>, <tt>:decimal</tt>, + # <tt>:datetime</tt>, <tt>:time</tt>, <tt>:date</tt>, + # <tt>:binary</tt>, <tt>:boolean</tt>. + # + # You may use a type not in this list as long as it is supported by your + # database (for example, "polygon" in MySQL), but this will not be database + # agnostic and should usually be avoided. + # + # Available options are (none of these exists by default): + # * <tt>:limit</tt> - + # Requests a maximum column length. This is number of characters for a <tt>:string</tt> column + # and number of bytes for <tt>:text</tt>, <tt>:binary</tt> and <tt>:integer</tt> columns. + # * <tt>:default</tt> - + # The column's default value. Use nil for NULL. + # * <tt>:null</tt> - + # Allows or disallows +NULL+ values in the column. This option could + # have been named <tt>:null_allowed</tt>. + # * <tt>:precision</tt> - + # Specifies the precision for a <tt>:decimal</tt> column. + # * <tt>:scale</tt> - + # Specifies the scale for a <tt>:decimal</tt> column. + # + # Note: The precision is the total number of significant digits + # and the scale is the number of digits that can be stored following + # the decimal point. For example, the number 123.45 has a precision of 5 + # and a scale of 2. A decimal with a precision of 5 and a scale of 2 can + # range from -999.99 to 999.99. + # + # Please be aware of different RDBMS implementations behavior with + # <tt>:decimal</tt> columns: + # * The SQL standard says the default scale should be 0, <tt>:scale</tt> <= + # <tt>:precision</tt>, and makes no comments about the requirements of + # <tt>:precision</tt>. + # * MySQL: <tt>:precision</tt> [1..63], <tt>:scale</tt> [0..30]. + # Default is (10,0). + # * PostgreSQL: <tt>:precision</tt> [1..infinity], + # <tt>:scale</tt> [0..infinity]. No default. + # * SQLite2: Any <tt>:precision</tt> and <tt>:scale</tt> may be used. + # Internal storage as strings. No default. + # * SQLite3: No restrictions on <tt>:precision</tt> and <tt>:scale</tt>, + # but the maximum supported <tt>:precision</tt> is 16. No default. + # * Oracle: <tt>:precision</tt> [1..38], <tt>:scale</tt> [-84..127]. + # Default is (38,0). + # * DB2: <tt>:precision</tt> [1..63], <tt>:scale</tt> [0..62]. + # Default unknown. + # * SqlServer?: <tt>:precision</tt> [1..38], <tt>:scale</tt> [0..38]. + # Default (38,0). + # + # == Examples + # + # add_column(:users, :picture, :binary, limit: 2.megabytes) + # # ALTER TABLE "users" ADD "picture" blob(2097152) + # + # add_column(:articles, :status, :string, limit: 20, default: 'draft', null: false) + # # ALTER TABLE "articles" ADD "status" varchar(20) DEFAULT 'draft' NOT NULL + # + # add_column(:answers, :bill_gates_money, :decimal, precision: 15, scale: 2) + # # ALTER TABLE "answers" ADD "bill_gates_money" decimal(15,2) + # + # add_column(:measurements, :sensor_reading, :decimal, precision: 30, scale: 20) + # # ALTER TABLE "measurements" ADD "sensor_reading" decimal(30,20) + # + # # While :scale defaults to zero on most databases, it + # # probably wouldn't hurt to include it. + # add_column(:measurements, :huge_integer, :decimal, precision: 30) + # # ALTER TABLE "measurements" ADD "huge_integer" decimal(30) + # + # # Defines a column with a database-specific type. + # add_column(:shapes, :triangle, 'polygon') + # # ALTER TABLE "shapes" ADD "triangle" polygon def add_column(table_name, column_name, type, options = {}) at = create_alter_table table_name at.add_column(column_name, type, options) @@ -460,11 +567,16 @@ module ActiveRecord # # change_column_default(:users, :email, nil) # - def change_column_default(table_name, column_name, default) + # Passing a hash containing +:from+ and +:to+ will make this change + # reversible in migration: + # + # change_column_default(:posts, :state, from: nil, to: "draft") + # + def change_column_default(table_name, column_name, default_or_changes) raise NotImplementedError, "change_column_default is not implemented" end - # Sets or removes a +NOT NULL+ constraint on a column. The +null+ flag + # Sets or removes a <tt>NOT NULL</tt> constraint on a column. The +null+ flag # indicates whether the value can be +NULL+. For example # # change_column_null(:users, :nickname, false) @@ -476,7 +588,7 @@ module ActiveRecord # allows them to be +NULL+ (drops the constraint). # # The method accepts an optional fourth argument to replace existing - # +NULL+s with some other value. Use that one when enabling the + # <tt>NULL</tt>s with some other value. Use that one when enabling the # constraint if needed, since otherwise those rows would not be valid. # # Please note the fourth argument does not set a column's default. @@ -530,6 +642,8 @@ module ActiveRecord # # CREATE INDEX by_name ON accounts(name(10)) # + # ====== Creating an index with specific key lengths for multiple keys + # # add_index(:accounts, [:name, :surname], name: 'by_name_surname', length: {name: 10, surname: 15}) # # generates: @@ -585,15 +699,15 @@ module ActiveRecord # Removes the given index from the table. # - # Removes the +index_accounts_on_column+ in the +accounts+ table. + # Removes the index on +branch_id+ in the +accounts+ table if exactly one such index exists. # - # remove_index :accounts, :column + # remove_index :accounts, :branch_id # - # Removes the index named +index_accounts_on_branch_id+ in the +accounts+ table. + # Removes the index on +branch_id+ in the +accounts+ table if exactly one such index exists. # # remove_index :accounts, column: :branch_id # - # Removes the index named +index_accounts_on_branch_id_and_party_id+ in the +accounts+ table. + # Removes the index on +branch_id+ and +party_id+ in the +accounts+ table if exactly one such index exists. # # remove_index :accounts, column: [:branch_id, :party_id] # @@ -602,10 +716,7 @@ module ActiveRecord # remove_index :accounts, name: :by_branch_party # def remove_index(table_name, options = {}) - remove_index!(table_name, index_name_for_remove(table_name, options)) - end - - def remove_index!(table_name, index_name) #:nodoc: + index_name = index_name_for_remove(table_name, options) execute "DROP INDEX #{quote_column_name(index_name)} ON #{quote_table_name(table_name)}" end @@ -652,7 +763,7 @@ module ActiveRecord # Adds a reference. The reference column is an integer by default, # the <tt>:type</tt> option can be used to specify a different type. # Optionally adds a +_type+ column, if <tt>:polymorphic</tt> option is provided. - # <tt>add_reference</tt> and <tt>add_belongs_to</tt> are acceptable. + # #add_reference and #add_belongs_to are acceptable. # # The +options+ hash can include the following keys: # [<tt>:type</tt>] @@ -660,9 +771,11 @@ module ActiveRecord # [<tt>:index</tt>] # Add an appropriate index. Defaults to false. # [<tt>:foreign_key</tt>] - # Add an appropriate foreign key. Defaults to false. + # Add an appropriate foreign key constraint. Defaults to false. # [<tt>:polymorphic</tt>] - # Wether an additional +_type+ column should be added. Defaults to false. + # Whether an additional +_type+ column should be added. Defaults to false. + # [<tt>:null</tt>] + # Whether the column allows nulls. Defaults to true. # # ====== Create a user_id integer column # @@ -680,13 +793,17 @@ module ActiveRecord # # add_reference(:products, :supplier, foreign_key: true) # + # ====== Create a supplier_id column and a foreign key to the firms table + # + # add_reference(:products, :supplier, foreign_key: {to_table: :firms}) + # def add_reference(table_name, *args) ReferenceDefinition.new(*args).add_to(update_table_definition(table_name, self)) end alias :add_belongs_to :add_reference # Removes the reference(s). Also removes a +type+ column if one exists. - # <tt>remove_reference</tt> and <tt>remove_belongs_to</tt> are acceptable. + # #remove_reference and #remove_belongs_to are acceptable. # # ====== Remove the reference # @@ -712,7 +829,7 @@ module ActiveRecord alias :remove_belongs_to :remove_reference # Returns an array of foreign keys for the given table. - # The foreign keys are represented as +ForeignKeyDefinition+ objects. + # The foreign keys are represented as ForeignKeyDefinition objects. def foreign_keys(table_name) raise NotImplementedError, "foreign_keys is not implemented" end @@ -756,28 +873,23 @@ module ActiveRecord # [<tt>:name</tt>] # The constraint name. Defaults to <tt>fk_rails_<identifier></tt>. # [<tt>:on_delete</tt>] - # Action that happens <tt>ON DELETE</tt>. Valid values are +:nullify+, +:cascade:+ and +:restrict+ + # Action that happens <tt>ON DELETE</tt>. Valid values are +:nullify+, +:cascade+ and +:restrict+ # [<tt>:on_update</tt>] - # Action that happens <tt>ON UPDATE</tt>. Valid values are +:nullify+, +:cascade:+ and +:restrict+ + # Action that happens <tt>ON UPDATE</tt>. Valid values are +:nullify+, +:cascade+ and +:restrict+ def add_foreign_key(from_table, to_table, options = {}) return unless supports_foreign_keys? - options[:column] ||= foreign_key_column_for(to_table) - - options = { - column: options[:column], - primary_key: options[:primary_key], - name: foreign_key_name(from_table, options), - on_delete: options[:on_delete], - on_update: options[:on_update] - } + options = foreign_key_options(from_table, to_table, options) at = create_alter_table from_table at.add_foreign_key to_table, options execute schema_creation.accept(at) end - # Removes the given foreign key from the table. + # Removes the given foreign key from the table. Any option parameters provided + # will be used to re-add the foreign key in case of a migration rollback. + # It is recommended that you provide any options used when creating the foreign + # key so that the migration can be reverted properly. # # Removes the foreign key on +accounts.branch_id+. # @@ -791,6 +903,7 @@ module ActiveRecord # # remove_foreign_key :accounts, name: :special_fk_name # + # The +options+ hash accepts the same keys as SchemaStatements#add_foreign_key. def remove_foreign_key(from_table, options_or_to_table = {}) return unless supports_foreign_keys? @@ -828,7 +941,17 @@ module ActiveRecord end def foreign_key_column_for(table_name) # :nodoc: - "#{table_name.to_s.singularize}_id" + prefix = Base.table_name_prefix + suffix = Base.table_name_suffix + name = table_name.to_s =~ /#{prefix}(.+)#{suffix}/ ? $1 : table_name.to_s + "#{name.singularize}_id" + end + + def foreign_key_options(from_table, to_table, options) # :nodoc: + options = options.dup + options[:column] ||= foreign_key_column_for(to_table) + options[:name] ||= foreign_key_name(from_table, options) + options end def dump_schema_information #:nodoc: @@ -845,7 +968,11 @@ module ActiveRecord ActiveRecord::SchemaMigration.create_table end - def assume_migrated_upto_version(version, migrations_paths = ActiveRecord::Migrator.migrations_paths) + def initialize_internal_metadata_table + ActiveRecord::InternalMetadata.create_table + end + + def assume_migrated_upto_version(version, migrations_paths) migrations_paths = Array(migrations_paths) version = version.to_i sm_table = quote_table_name(ActiveRecord::Migrator.schema_migrations_table_name) @@ -905,11 +1032,12 @@ module ActiveRecord end # Given a set of columns and an ORDER BY clause, returns the columns for a SELECT DISTINCT. - # Both PostgreSQL and Oracle overrides this for custom DISTINCT syntax - they + # PostgreSQL, MySQL, and Oracle overrides this for custom DISTINCT syntax - they # require the order columns appear in the SELECT. # # columns_for_distinct("posts.id", ["posts.created_at desc"]) - def columns_for_distinct(columns, orders) #:nodoc: + # + def columns_for_distinct(columns, orders) # :nodoc: columns end @@ -964,7 +1092,7 @@ module ActiveRecord if index_name.length > max_index_length raise ArgumentError, "Index name '#{index_name}' on table '#{table_name}' is too long; the limit is #{max_index_length} characters" end - if table_exists?(table_name) && index_name_exists?(table_name, index_name, false) + if data_source_exists?(table_name) && index_name_exists?(table_name, index_name, false) raise ArgumentError, "Index name '#{index_name}' on table '#{table_name}' already exists" end index_columns = quoted_columns_for_index(column_names, options).join(", ") @@ -972,6 +1100,10 @@ module ActiveRecord [index_name, index_type, index_columns, index_options, algorithm, using] end + def options_include_default?(options) + options.include?(:default) && !(options[:null] == false && options[:default].nil?) + end + protected def add_index_sort_order(option_strings, column_names, options = {}) if options.is_a?(Hash) && order = options[:order] @@ -998,26 +1130,36 @@ module ActiveRecord column_names.map {|name| quote_column_name(name) + option_strings[name]} end - def options_include_default?(options) - options.include?(:default) && !(options[:null] == false && options[:default].nil?) - end - def index_name_for_remove(table_name, options = {}) - index_name = index_name(table_name, options) + # if the adapter doesn't support the indexes call the best we can do + # is return the default index name for the options provided + return index_name(table_name, options) unless respond_to?(:indexes) - unless index_name_exists?(table_name, index_name, true) - if options.is_a?(Hash) && options.has_key?(:name) - options_without_column = options.dup - options_without_column.delete :column - index_name_without_column = index_name(table_name, options_without_column) + checks = [] - return index_name_without_column if index_name_exists?(table_name, index_name_without_column, false) - end + if options.is_a?(Hash) + checks << lambda { |i| i.name == options[:name].to_s } if options.has_key?(:name) + column_names = Array(options[:column]).map(&:to_s) + else + column_names = Array(options).map(&:to_s) + end - raise ArgumentError, "Index name '#{index_name}' on table '#{table_name}' does not exist" + if column_names.any? + checks << lambda { |i| i.columns.join('_and_') == column_names.join('_and_') } end - index_name + raise ArgumentError "No name or columns specified" if checks.none? + + matching_indexes = indexes(table_name).select { |i| checks.all? { |check| check[i] } } + + if matching_indexes.count > 1 + raise ArgumentError, "Multiple indexes found on #{table_name} columns #{column_names}. " \ + "Specify an index name from #{matching_indexes.map(&:name).join(', ')}" + elsif matching_indexes.none? + raise ArgumentError, "No indexes found on #{table_name} with the options provided." + else + matching_indexes.first.name + end end def rename_table_indexes(table_name, new_name) @@ -1044,7 +1186,7 @@ module ActiveRecord private def create_table_definition(name, temporary = false, options = nil, as = nil) - TableDefinition.new native_database_types, name, temporary, options, as + TableDefinition.new(name, temporary, options, as) end def create_alter_table(name) @@ -1064,6 +1206,14 @@ module ActiveRecord raise ArgumentError, "Index name '#{new_name}' on table '#{table_name}' is too long; the limit is #{allowed_index_name_length} characters" end end + + def extract_new_default_value(default_or_changes) + if default_or_changes.is_a?(Hash) && default_or_changes.has_key?(:from) && default_or_changes.has_key?(:to) + default_or_changes[:to] + else + default_or_changes + end + end end end end diff --git a/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb b/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb index 295a7bed87..14d04a6388 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb @@ -33,6 +33,7 @@ module ActiveRecord class NullTransaction #:nodoc: def initialize; end + def state; end def closed?; true; end def open?; false; end def joinable?; false; end diff --git a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb index 6d3a21a3dc..d9b42d4283 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb @@ -1,5 +1,6 @@ require 'active_record/type' require 'active_support/core_ext/benchmark' +require 'active_record/connection_adapters/determine_if_preparable_visitor' require 'active_record/connection_adapters/schema_cache' require 'active_record/connection_adapters/sql_type_metadata' require 'active_record/connection_adapters/abstract/schema_dumper' @@ -22,6 +23,7 @@ module ActiveRecord autoload :TableDefinition autoload :Table autoload :AlterTable + autoload :ReferenceDefinition end autoload_at 'active_record/connection_adapters/abstract/connection_pool' do @@ -51,15 +53,15 @@ module ActiveRecord # related classes form the abstraction layer which makes this possible. # An AbstractAdapter represents a connection to a database, and provides an # abstract interface for database-specific functionality such as establishing - # a connection, escaping values, building the right SQL fragments for ':offset' - # and ':limit' options, etc. + # a connection, escaping values, building the right SQL fragments for +:offset+ + # and +:limit+ options, etc. # # All the concrete database adapters follow the interface laid down in this class. - # ActiveRecord::Base.connection returns an AbstractAdapter object, which + # {ActiveRecord::Base.connection}[rdoc-ref:ConnectionHandling#connection] returns an AbstractAdapter object, which # you can use. # # Most of the methods in the adapter are useful during migrations. Most - # notably, the instance methods provided by SchemaStatement are very useful. + # notably, the instance methods provided by SchemaStatements are very useful. class AbstractAdapter ADAPTER_NAME = 'Abstract'.freeze include Quoting, DatabaseStatements, SchemaStatements @@ -94,19 +96,32 @@ module ActiveRecord attr_reader :prepared_statements - def initialize(connection, logger = nil, pool = nil) #:nodoc: + def initialize(connection, logger = nil, config = {}) # :nodoc: super() @connection = connection @owner = nil @instrumenter = ActiveSupport::Notifications.instrumenter @logger = logger - @pool = pool + @config = config + @pool = nil @schema_cache = SchemaCache.new self @visitor = nil @prepared_statements = false end + class Version + include Comparable + + def initialize(version_string) + @version = version_string.split('.').map(&:to_i) + end + + def <=>(version_string) + @version <=> version_string.split('.').map(&:to_i) + end + end + class BindCollector < Arel::Collectors::Bind def compile(bvs, conn) casted_binds = conn.prepare_binds_for_database(bvs) @@ -201,6 +216,11 @@ module ActiveRecord false end + # Does this adapter support application-enforced advisory locking? + def supports_advisory_locks? + false + end + # Should primary key values be selected from their corresponding # sequence before the insert statement? If true, next_sequence_value # is called before each insert to set the record's primary key. @@ -254,6 +274,11 @@ module ActiveRecord false end + # Does this adapter support json data type? + def supports_json? + false + end + # This is meant to be implemented by the adapters that support extensions def disable_extension(name) end @@ -262,6 +287,20 @@ module ActiveRecord def enable_extension(name) end + # This is meant to be implemented by the adapters that support advisory + # locks + # + # Return true if we got the lock, otherwise false + def get_advisory_lock(lock_id) # :nodoc: + end + + # This is meant to be implemented by the adapters that support advisory + # locks. + # + # Return true if we released the lock, otherwise false + def release_advisory_lock(lock_id) # :nodoc: + end + # A list of extensions, to be filled in by adapters that support them. def extensions [] @@ -272,12 +311,6 @@ module ActiveRecord {} end - # Returns a bind substitution value given a bind +column+ - # NOTE: The column param is currently being used by the sqlserver-adapter - def substitute_at(column, _unused = 0) - Arel::Nodes::BindParam.new - end - # REFERENTIAL INTEGRITY ==================================== # Override to turn off referential integrity while executing <tt>&block</tt>. @@ -331,14 +364,14 @@ module ActiveRecord end # Checks whether the connection to the database is still active (i.e. not stale). - # This is done under the hood by calling <tt>active?</tt>. If the connection + # This is done under the hood by calling #active?. If the connection # is no longer active, then this method will reconnect to the database. def verify!(*ignored) reconnect! unless active? end # Provides access to the underlying database driver for this adapter. For - # example, this method returns a Mysql object in case of MysqlAdapter, + # example, this method returns a Mysql2::Client object in case of Mysql2Adapter, # and a PGconn object in case of PostgreSQLAdapter. # # This is useful for when you need to call a proprietary method such as @@ -353,19 +386,17 @@ module ActiveRecord def release_savepoint(name = nil) end - def case_sensitive_modifier(node, table_attribute) - node - end - def case_sensitive_comparison(table, attribute, column, value) - table_attr = table[attribute] - value = case_sensitive_modifier(value, table_attr) unless value.nil? - table_attr.eq(value) + if value.nil? + table[attribute].eq(value) + else + table[attribute].eq(Arel::Nodes::BindParam.new) + end end def case_insensitive_comparison(table, attribute, column, value) if can_perform_case_insensitive_comparison_for?(column) - table[attribute].lower.eq(table.lower(value)) + table[attribute].lower.eq(table.lower(Arel::Nodes::BindParam.new)) else case_sensitive_comparison(table, attribute, column, value) end @@ -501,7 +532,7 @@ module ActiveRecord def translate_exception(exception, message) # override in derived class - ActiveRecord::StatementInvalid.new(message, exception) + ActiveRecord::StatementInvalid.new(message) end def without_prepared_statement?(binds) diff --git a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb index c3206c6045..3e84786be0 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb @@ -1,235 +1,33 @@ +require 'active_record/connection_adapters/abstract_adapter' +require 'active_record/connection_adapters/mysql/column' +require 'active_record/connection_adapters/mysql/schema_creation' +require 'active_record/connection_adapters/mysql/schema_definitions' +require 'active_record/connection_adapters/mysql/schema_dumper' +require 'active_record/connection_adapters/mysql/type_metadata' + require 'active_support/core_ext/string/strip' module ActiveRecord module ConnectionAdapters class AbstractMysqlAdapter < AbstractAdapter + include MySQL::ColumnDumper include Savepoints - module ColumnMethods - def primary_key(name, type = :primary_key, **options) - options[:auto_increment] = true if type == :bigint - super - end - end - - class ColumnDefinition < ActiveRecord::ConnectionAdapters::ColumnDefinition - attr_accessor :charset - end - - class TableDefinition < ActiveRecord::ConnectionAdapters::TableDefinition - include ColumnMethods - - def new_column_definition(name, type, options) # :nodoc: - column = super - case column.type - when :primary_key - column.type = :integer - column.auto_increment = true - end - column.charset = options[:charset] - column - end - - private - - def create_column_definition(name, type) - ColumnDefinition.new(name, type) - end - end - - class Table < ActiveRecord::ConnectionAdapters::Table - include ColumnMethods - end - - class SchemaCreation < AbstractAdapter::SchemaCreation - private - - def visit_DropForeignKey(name) - "DROP FOREIGN KEY #{name}" - end - - def visit_TableDefinition(o) - name = o.name - create_sql = "CREATE#{' TEMPORARY' if o.temporary} TABLE #{quote_table_name(name)} " - - statements = o.columns.map { |c| accept c } - statements.concat(o.indexes.map { |column_name, options| index_in_create(name, column_name, options) }) - - create_sql << "(#{statements.join(', ')}) " if statements.present? - create_sql << "#{o.options}" - create_sql << " AS #{@conn.to_sql(o.as)}" if o.as - create_sql - end - - def visit_AddColumnDefinition(o) - add_column_position!(super, column_options(o.column)) - end - - def visit_ChangeColumnDefinition(o) - change_column_sql = "CHANGE #{quote_column_name(o.name)} #{accept(o.column)}" - add_column_position!(change_column_sql, column_options(o.column)) - end - - def column_options(o) - column_options = super - column_options[:charset] = o.charset - column_options - end - - def add_column_options!(sql, options) - if options[:charset] - sql << " CHARACTER SET #{options[:charset]}" - end - if options[:collation] - sql << " COLLATE #{options[:collation]}" - end - super - end - - def add_column_position!(sql, options) - if options[:first] - sql << " FIRST" - elsif options[:after] - sql << " AFTER #{quote_column_name(options[:after])}" - end - sql - end - - def index_in_create(table_name, column_name, options) - index_name, index_type, index_columns, _, _, index_using = @conn.add_index_options(table_name, column_name, options) - "#{index_type} INDEX #{quote_column_name(index_name)} #{index_using} (#{index_columns}) " - end - end - def update_table_definition(table_name, base) # :nodoc: - Table.new(table_name, base) + MySQL::Table.new(table_name, base) end def schema_creation - SchemaCreation.new self - end - - def column_spec_for_primary_key(column) - spec = {} - if column.auto_increment? - spec[:id] = ':bigint' if column.bigint? - return if spec.empty? - else - spec[:id] = column.type.inspect - spec.merge!(prepare_column_options(column).delete_if { |key, _| [:name, :type, :null].include?(key) }) - end - spec - end - - private - - def schema_limit(column) - super unless column.type == :boolean - end - - def schema_precision(column) - super unless /time/ === column.sql_type && column.precision == 0 - end - - def schema_collation(column) - if column.collation && table_name = column.instance_variable_get(:@table_name) - @collation_cache ||= {} - @collation_cache[table_name] ||= select_one("SHOW TABLE STATUS LIKE '#{table_name}'")["Collation"] - column.collation.inspect if column.collation != @collation_cache[table_name] - end - end - - public - - class Column < ConnectionAdapters::Column # :nodoc: - delegate :strict, :extra, to: :sql_type_metadata, allow_nil: true - - def initialize(*) - super - assert_valid_default(default) - extract_default - end - - def extract_default - if blob_or_text_column? - @default = null || strict ? nil : '' - elsif missing_default_forged_as_empty_string?(default) - @default = nil - end - end - - def has_default? - return false if blob_or_text_column? # MySQL forbids defaults on blob and text columns - super - end - - def blob_or_text_column? - sql_type =~ /blob/i || type == :text - end - - def case_sensitive? - collation && !collation.match(/_ci$/) - end - - def auto_increment? - extra == 'auto_increment' - end - - private - - # MySQL misreports NOT NULL column default when none is given. - # We can't detect this for columns which may have a legitimate '' - # default (string) but we can for others (integer, datetime, boolean, - # and the rest). - # - # Test whether the column has default '', is not null, and is not - # a type allowing default ''. - def missing_default_forged_as_empty_string?(default) - type != :string && !null && default == '' - end - - def assert_valid_default(default) - if blob_or_text_column? && default.present? - raise ArgumentError, "#{type} columns cannot have a default value: #{default.inspect}" - end - end - end - - class MysqlTypeMetadata < DelegateClass(SqlTypeMetadata) # :nodoc: - attr_reader :extra, :strict - - def initialize(type_metadata, extra: "", strict: false) - super(type_metadata) - @type_metadata = type_metadata - @extra = extra - @strict = strict - end - - def ==(other) - other.is_a?(MysqlTypeMetadata) && - attributes_for_hash == other.attributes_for_hash - end - alias eql? == - - def hash - attributes_for_hash.hash - end - - protected - - def attributes_for_hash - [self.class, @type_metadata, extra, strict] - end + MySQL::SchemaCreation.new(self) end ## # :singleton-method: - # By default, the MysqlAdapter will consider all columns of type <tt>tinyint(1)</tt> - # as boolean. If you wish to disable this emulation (which was the default - # behavior in versions 0.13.1 and earlier) you can add the following line + # By default, the Mysql2Adapter will consider all columns of type <tt>tinyint(1)</tt> + # as boolean. If you wish to disable this emulation you can add the following line # to your application.rb file: # - # ActiveRecord::ConnectionAdapters::Mysql[2]Adapter.emulate_booleans = false + # ActiveRecord::ConnectionAdapters::Mysql2Adapter.emulate_booleans = false class_attribute :emulate_booleans self.emulate_booleans = true @@ -242,17 +40,18 @@ module ActiveRecord QUOTED_TRUE, QUOTED_FALSE = '1', '0' NATIVE_DATABASE_TYPES = { - :primary_key => "int(11) auto_increment PRIMARY KEY", - :string => { :name => "varchar", :limit => 255 }, - :text => { :name => "text" }, - :integer => { :name => "int", :limit => 4 }, - :float => { :name => "float" }, - :decimal => { :name => "decimal" }, - :datetime => { :name => "datetime" }, - :time => { :name => "time" }, - :date => { :name => "date" }, - :binary => { :name => "blob" }, - :boolean => { :name => "tinyint", :limit => 1 } + primary_key: "int auto_increment PRIMARY KEY", + string: { name: "varchar", limit: 255 }, + text: { name: "text" }, + integer: { name: "int", limit: 4 }, + float: { name: "float" }, + decimal: { name: "decimal" }, + datetime: { name: "datetime" }, + time: { name: "time" }, + date: { name: "date" }, + binary: { name: "blob" }, + boolean: { name: "tinyint", limit: 1 }, + json: { name: "json" }, } INDEX_TYPES = [:fulltext, :spatial] @@ -260,14 +59,14 @@ module ActiveRecord # FIXME: Make the first parameter more similar for the two adapters def initialize(connection, logger, connection_options, config) - super(connection, logger) - @connection_options, @config = connection_options, config + super(connection, logger, config) @quoted_column_names, @quoted_table_names = {}, {} @visitor = Arel::Visitors::MySQL.new self if self.class.type_cast_config_to_boolean(config.fetch(:prepared_statements) { true }) @prepared_statements = true + @visitor.extend(DetermineIfPreparableVisitor) else @prepared_statements = false end @@ -283,6 +82,10 @@ module ActiveRecord end end + def version + @version ||= Version.new(full_version.match(/^\d+\.\d+\.\d+/)[0]) + end + # Returns true, since this connection adapter supports migrations. def supports_migrations? true @@ -307,7 +110,11 @@ module ActiveRecord # # http://bugs.mysql.com/bug.php?id=39170 def supports_transaction_isolation? - version[0] >= 5 + version >= '5.0.0' + end + + def supports_explain? + true end def supports_indexes_in_create? @@ -319,11 +126,25 @@ module ActiveRecord end def supports_views? - version[0] >= 5 + version >= '5.0.0' end def supports_datetime_with_precision? - (version[0] == 5 && version[1] >= 6) || version[0] >= 6 + version >= '5.6.4' + end + + # 5.0.0 definitely supports it, possibly supported by earlier versions but + # not sure + def supports_advisory_locks? + version >= '5.0.0' + end + + def get_advisory_lock(lock_name, timeout = 0) # :nodoc: + select_value("SELECT GET_LOCK('#{lock_name}', #{timeout});").to_s == '1' + end + + def release_advisory_lock(lock_name) # :nodoc: + select_value("SELECT RELEASE_LOCK('#{lock_name}')").to_s == '1' end def native_database_types @@ -343,7 +164,7 @@ module ActiveRecord end def new_column(field, default, sql_type_metadata = nil, null = true, default_function = nil, collation = nil) # :nodoc: - Column.new(field, default, sql_type_metadata, null, default_function, collation) + MySQL::Column.new(field, default, sql_type_metadata, null, default_function, collation) end # Must return the MySQL error number from the exception, if the exception has an @@ -386,6 +207,14 @@ module ActiveRecord 0 end + def quoted_date(value) + if supports_datetime_with_precision? + super + else + super.sub(/\.\d{6}\z/, '') + end + end + # REFERENTIAL INTEGRITY ==================================== def disable_referential_integrity #:nodoc: @@ -403,6 +232,80 @@ module ActiveRecord # DATABASE STATEMENTS ====================================== #++ + def explain(arel, binds = []) + sql = "EXPLAIN #{to_sql(arel, binds)}" + start = Time.now + result = exec_query(sql, 'EXPLAIN', binds) + elapsed = Time.now - start + + ExplainPrettyPrinter.new.pp(result, elapsed) + end + + class ExplainPrettyPrinter # :nodoc: + # Pretty prints the result of an EXPLAIN in a way that resembles the output of the + # MySQL shell: + # + # +----+-------------+-------+-------+---------------+---------+---------+-------+------+-------------+ + # | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | + # +----+-------------+-------+-------+---------------+---------+---------+-------+------+-------------+ + # | 1 | SIMPLE | users | const | PRIMARY | PRIMARY | 4 | const | 1 | | + # | 1 | SIMPLE | posts | ALL | NULL | NULL | NULL | NULL | 1 | Using where | + # +----+-------------+-------+-------+---------------+---------+---------+-------+------+-------------+ + # 2 rows in set (0.00 sec) + # + # This is an exercise in Ruby hyperrealism :). + def pp(result, elapsed) + widths = compute_column_widths(result) + separator = build_separator(widths) + + pp = [] + + pp << separator + pp << build_cells(result.columns, widths) + pp << separator + + result.rows.each do |row| + pp << build_cells(row, widths) + end + + pp << separator + pp << build_footer(result.rows.length, elapsed) + + pp.join("\n") + "\n" + end + + private + + def compute_column_widths(result) + [].tap do |widths| + result.columns.each_with_index do |column, i| + cells_in_column = [column] + result.rows.map {|r| r[i].nil? ? 'NULL' : r[i].to_s} + widths << cells_in_column.map(&:length).max + end + end + end + + def build_separator(widths) + padding = 1 + '+' + widths.map {|w| '-' * (w + (padding*2))}.join('+') + '+' + end + + def build_cells(items, widths) + cells = [] + items.each_with_index do |item, i| + item = 'NULL' if item.nil? + justifier = item.is_a?(Numeric) ? 'rjust' : 'ljust' + cells << item.to_s.send(justifier, widths[i]) + end + '| ' + cells.join(' | ') + ' |' + end + + def build_footer(nrows, elapsed) + rows_label = nrows == 1 ? 'row' : 'rows' + "#{nrows} #{rows_label} in set (%.2f sec)" % elapsed + end + end + def clear_cache! super reload_type_map @@ -413,18 +316,13 @@ module ActiveRecord log(sql, name) { @connection.query(sql) } end - # MysqlAdapter has to free a result after using it, so we use this method to write - # stuff in an abstract way without concerning ourselves about whether it needs to be - # explicitly freed or not. - def execute_and_free(sql, name = nil) #:nodoc: + # Mysql2Adapter doesn't have to free a result after using it, but we use this method + # to write stuff in an abstract way without concerning ourselves about whether it + # needs to be explicitly freed or not. + def execute_and_free(sql, name = nil) # :nodoc: yield execute(sql, name) end - def update_sql(sql, name = nil) #:nodoc: - super - @connection.affected_rows - end - def begin_db_transaction execute "BEGIN" end @@ -445,7 +343,7 @@ module ActiveRecord # In the simple case, MySQL allows us to place JOINs directly into the UPDATE # query. However, this does not allow for LIMIT, OFFSET and ORDER. To support # these, we must use a subquery. - def join_to_update(update, select) #:nodoc: + def join_to_update(update, select, key) # :nodoc: if select.limit || select.offset || select.orders.any? super else @@ -506,33 +404,70 @@ module ActiveRecord show_variable 'collation_database' end - def tables(name = nil, database = nil, like = nil) #:nodoc: - sql = "SHOW TABLES " - sql << "IN #{quote_table_name(database)} " if database - sql << "LIKE #{quote(like)}" if like + def tables(name = nil) # :nodoc: + ActiveSupport::Deprecation.warn(<<-MSG.squish) + #tables currently returns both tables and views. + This behavior is deprecated and will be changed with Rails 5.1 to only return tables. + Use #data_sources instead. + MSG - execute_and_free(sql, 'SCHEMA') do |result| - result.collect(&:first) + if name + ActiveSupport::Deprecation.warn(<<-MSG.squish) + Passing arguments to #tables is deprecated without replacement. + MSG end + + data_sources + end + + def data_sources + sql = "SELECT table_name FROM information_schema.tables " + sql << "WHERE table_schema = #{quote(@config[:database])}" + + select_values(sql, 'SCHEMA') end def truncate(table_name, name = nil) execute "TRUNCATE TABLE #{quote_table_name(table_name)}", name end - def table_exists?(name) - return false unless name.present? - return true if tables(nil, nil, name).any? + def table_exists?(table_name) + # Update lib/active_record/internal_metadata.rb when this gets removed + ActiveSupport::Deprecation.warn(<<-MSG.squish) + #table_exists? currently checks both tables and views. + This behavior is deprecated and will be changed with Rails 5.1 to only check tables. + Use #data_source_exists? instead. + MSG - name = name.to_s - schema, table = name.split('.', 2) + data_source_exists?(table_name) + end - unless table # A table was provided without a schema - table = schema - schema = nil - end + def data_source_exists?(table_name) + return false unless table_name.present? - tables(nil, schema, table).any? + schema, name = table_name.to_s.split('.', 2) + schema, name = @config[:database], schema unless name # A table was provided without a schema + + sql = "SELECT table_name FROM information_schema.tables " + sql << "WHERE table_schema = #{quote(schema)} AND table_name = #{quote(name)}" + + select_values(sql, 'SCHEMA').any? + end + + def views # :nodoc: + select_values("SHOW FULL TABLES WHERE table_type = 'VIEW'", 'SCHEMA') + end + + def view_exists?(view_name) # :nodoc: + return false unless view_name.present? + + schema, name = view_name.to_s.split('.', 2) + schema, name = @config[:database], schema unless name # A view was provided without a schema + + sql = "SELECT table_name FROM information_schema.tables WHERE table_type = 'VIEW'" + sql << " AND table_schema = #{quote(schema)} AND table_name = #{quote(name)}" + + select_values(sql, 'SCHEMA').any? end # Returns an array of indexes for the given table. @@ -560,14 +495,16 @@ module ActiveRecord end # Returns an array of +Column+ objects for the table specified by +table_name+. - def columns(table_name)#:nodoc: + def columns(table_name) # :nodoc: sql = "SHOW FULL FIELDS FROM #{quote_table_name(table_name)}" execute_and_free(sql, 'SCHEMA') do |result| each_hash(result).map do |field| - field_name = set_field_encoding(field[:Field]) - sql_type = field[:Type] - type_metadata = fetch_type_metadata(sql_type, field[:Extra]) - new_column(field_name, field[:Default], type_metadata, field[:Null] == "YES", nil, field[:Collation]) + type_metadata = fetch_type_metadata(field[:Type], field[:Extra]) + if type_metadata.type == :datetime && field[:Default] == "CURRENT_TIMESTAMP" + new_column(field[:Field], nil, type_metadata, field[:Null] == "YES", field[:Default], field[:Collation]) + else + new_column(field[:Field], field[:Default], type_metadata, field[:Null] == "YES", nil, field[:Collation]) + end end end end @@ -616,6 +553,7 @@ module ActiveRecord # it can be helpful to provide these in a migration's +change+ method so it can be reverted. # In that case, +options+ and the block will be used by create_table. def drop_table(table_name, options = {}) + create_table_info_cache.delete(table_name) if create_table_info_cache.key?(table_name) execute "DROP#{' TEMPORARY' if options[:temporary]} TABLE#{' IF EXISTS' if options[:if_exists]} #{quote_table_name(table_name)}#{' CASCADE' if options[:force] == :cascade}" end @@ -629,7 +567,8 @@ module ActiveRecord end end - def change_column_default(table_name, column_name, default) #:nodoc: + def change_column_default(table_name, column_name, default_or_changes) #:nodoc: + default = extract_new_default_value(default_or_changes) column = column_for(table_name, column_name) change_column table_name, column_name, column.sql_type, :default => default end @@ -670,7 +609,7 @@ module ActiveRecord AND fk.table_name = '#{table_name}' SQL - create_table_info = select_one("SHOW CREATE TABLE #{quote_table_name(table_name)}")["Create Table"] + create_table_info = create_table_info(table_name) fk_info.map do |row| options = { @@ -687,7 +626,7 @@ module ActiveRecord end def table_options(table_name) - create_table_info = select_one("SHOW CREATE TABLE #{quote_table_name(table_name)}")["Create Table"] + create_table_info = create_table_info(table_name) # strip create_definitions and partition_options raw_table_options = create_table_info.sub(/\A.*\n\) /m, '').sub(/\n\/\*!.*\*\/\n\z/m, '').strip @@ -697,54 +636,57 @@ module ActiveRecord end # Maps logical Rails types to MySQL-specific data types. - def type_to_sql(type, limit = nil, precision = nil, scale = nil) - case type.to_s - when 'binary' - binary_to_sql(limit) + def type_to_sql(type, limit = nil, precision = nil, scale = nil, unsigned = nil) + sql = case type.to_s when 'integer' integer_to_sql(limit) when 'text' text_to_sql(limit) + when 'blob' + binary_to_sql(limit) + when 'binary' + if (0..0xfff) === limit + "varbinary(#{limit})" + else + binary_to_sql(limit) + end else - super + super(type, limit, precision, scale) end + + sql << ' unsigned' if unsigned && type != :primary_key + sql end # SHOW VARIABLES LIKE 'name' def show_variable(name) - variables = select_all("SHOW VARIABLES LIKE '#{name}'", 'SCHEMA') + variables = select_all("select @@#{name} as 'Value'", 'SCHEMA') variables.first['Value'] unless variables.empty? + rescue ActiveRecord::StatementInvalid + nil end - # Returns a table's primary key and belonging sequence. - def pk_and_sequence_for(table) - execute_and_free("SHOW CREATE TABLE #{quote_table_name(table)}", 'SCHEMA') do |result| - create_table = each_hash(result).first[:"Create Table"] - if create_table.to_s =~ /PRIMARY KEY\s+(?:USING\s+\w+\s+)?\((.+)\)/ - keys = $1.split(",").map { |key| key.delete('`"') } - keys.length == 1 ? [keys.first, nil] : nil - else - nil - end - end - end + def primary_keys(table_name) # :nodoc: + raise ArgumentError unless table_name.present? - # Returns just a table's primary key - def primary_key(table) - pk_and_sequence = pk_and_sequence_for(table) - pk_and_sequence && pk_and_sequence.first - end + schema, name = table_name.to_s.split('.', 2) + schema, name = @config[:database], schema unless name # A table was provided without a schema - def case_sensitive_modifier(node, table_attribute) - node = Arel::Nodes.build_quoted node, table_attribute - Arel::Nodes::Bin.new(node) + select_values(<<-SQL.strip_heredoc, 'SCHEMA') + SELECT column_name + FROM information_schema.key_column_usage + WHERE constraint_name = 'PRIMARY' + AND table_schema = #{quote(schema)} + AND table_name = #{quote(name)} + ORDER BY ordinal_position + SQL end def case_sensitive_comparison(table, attribute, column, value) - if column.case_sensitive? - table[attribute].eq(value) - else + if value.nil? || column.case_sensitive? super + else + table[attribute].eq(Arel::Nodes::Bin.new(Arel::Nodes::BindParam.new)) end end @@ -752,10 +694,25 @@ module ActiveRecord if column.case_sensitive? super else - table[attribute].eq(value) + table[attribute].eq(Arel::Nodes::BindParam.new) end end + # In MySQL 5.7.5 and up, ONLY_FULL_GROUP_BY affects handling of queries that use + # DISTINCT and ORDER BY. It requires the ORDER BY columns in the select list for + # distinct queries, and requires that the ORDER BY include the distinct column. + # See https://dev.mysql.com/doc/refman/5.7/en/group-by-handling.html + def columns_for_distinct(columns, orders) # :nodoc: + order_columns = orders.reject(&:blank?).map { |s| + # Convert Arel node to string + s = s.to_sql unless s.is_a?(String) + # Remove any ASC/DESC modifiers + s.gsub(/\s+(?:ASC|DESC)\b/i, '') + }.reject(&:blank?).map.with_index { |column, i| "#{column} AS alias_#{i}" } + + [super, *order_columns].join(', ') + end + def strict_mode? self.class.type_cast_config_to_boolean(@config.fetch(:strict, true)) end @@ -781,6 +738,7 @@ module ActiveRecord m.register_type %r(longblob)i, Type::Binary.new(limit: 2**32 - 1) m.register_type %r(^float)i, Type::Float.new(limit: 24) m.register_type %r(^double)i, Type::Float.new(limit: 53) + m.register_type %r(^json)i, MysqlJson.new register_integer_type m, %r(^bigint)i, limit: 8 register_integer_type m, %r(^int)i, limit: 4 @@ -789,7 +747,6 @@ module ActiveRecord register_integer_type m, %r(^tinyint)i, limit: 1 m.alias_type %r(tinyint\(1\))i, 'boolean' if emulate_booleans - m.alias_type %r(set)i, 'varchar' m.alias_type %r(year)i, 'integer' m.alias_type %r(bit)i, 'binary' @@ -798,11 +755,17 @@ module ActiveRecord .split(',').map{|enum| enum.strip.length - 2}.max MysqlString.new(limit: limit) end + + m.register_type(%r(^set)i) do |sql_type| + limit = sql_type[/^set\((.+)\)/i, 1] + .split(',').map{|set| set.strip.length - 1}.sum - 1 + MysqlString.new(limit: limit) + end end def register_integer_type(mapping, key, options) # :nodoc: mapping.register_type(key) do |sql_type| - if /unsigned/i =~ sql_type + if /\bunsigned\z/ === sql_type Type::UnsignedInteger.new(options) else Type::Integer.new(options) @@ -819,7 +782,7 @@ module ActiveRecord end def fetch_type_metadata(sql_type, extra = "") - MysqlTypeMetadata.new(super(sql_type), extra: extra, strict: strict_mode?) + MySQL::TypeMetadata.new(super(sql_type), extra: extra, strict: strict_mode?) end def add_index_length(option_strings, column_names, options = {}) @@ -850,9 +813,9 @@ module ActiveRecord def translate_exception(exception, message) case error_number(exception) when 1062 - RecordNotUnique.new(message, exception) + RecordNotUnique.new(message) when 1452 - InvalidForeignKey.new(message, exception) + InvalidForeignKey.new(message) else super end @@ -929,15 +892,13 @@ module ActiveRecord subsubselect = select.clone subsubselect.projections = [key] - subselect = Arel::SelectManager.new(select.engine) - subselect.project Arel.sql(key.name) - # Materialized subquery by adding distinct + # Materialize subquery by adding distinct # to work with MySQL 5.7.6 which sets optimizer_switch='derived_merge=on' - subselect.from subsubselect.distinct.as('__active_record_temp') - end + subsubselect.distinct unless select.limit || select.offset || select.orders.any? - def version - @version ||= full_version.scan(/^(\d+)\.(\d+)\.(\d+)/).flatten.map(&:to_i) + subselect = Arel::SelectManager.new(select.engine) + subselect.project Arel.sql(key.name) + subselect.from subsubselect.as('__active_record_temp') end def mariadb? @@ -945,7 +906,7 @@ module ActiveRecord end def supports_rename_index? - mariadb? ? false : (version[0] == 5 && version[1] >= 7) || version[0] >= 6 + mariadb? ? false : version >= '5.7.6' end def configure_connection @@ -959,15 +920,17 @@ module ActiveRecord wait_timeout = 2147483 unless wait_timeout.is_a?(Fixnum) variables['wait_timeout'] = self.class.type_cast_config_to_integer(wait_timeout) + defaults = [':default', :default].to_set + # Make MySQL reject illegal values rather than truncating or blanking them, see - # http://dev.mysql.com/doc/refman/5.6/en/sql-mode.html#sqlmode_strict_all_tables + # http://dev.mysql.com/doc/refman/5.7/en/sql-mode.html#sqlmode_strict_all_tables # If the user has provided another value for sql_mode, don't replace it. - unless variables.has_key?('sql_mode') + unless variables.has_key?('sql_mode') || defaults.include?(@config[:strict]) variables['sql_mode'] = strict_mode? ? 'STRICT_ALL_TABLES' : '' end # NAMES does not have an equals sign, see - # http://dev.mysql.com/doc/refman/5.6/en/set-statement.html#id944430 + # http://dev.mysql.com/doc/refman/5.7/en/set-statement.html#id944430 # (trailing comma because variable_assignments will always have content) if @config[:encoding] encoding = "NAMES #{@config[:encoding]}" @@ -977,7 +940,7 @@ module ActiveRecord # Gather up all of the SET variables... variable_assignments = variables.map do |k, v| - if v == ':default' || v == :default + if defaults.include?(v) "@@SESSION.#{k} = DEFAULT" # Sets the value to the global or compile default elsif !v.nil? "@@SESSION.#{k} = #{quote(v)}" @@ -998,17 +961,16 @@ module ActiveRecord end end - def create_table_definition(name, temporary = false, options = nil, as = nil) # :nodoc: - TableDefinition.new(native_database_types, name, temporary, options, as) + def create_table_info_cache # :nodoc: + @create_table_info_cache ||= {} end - def binary_to_sql(limit) # :nodoc: - case limit - when 0..0xfff; "varbinary(#{limit})" - when nil; "blob" - when 0x1000..0xffffffff; "blob(#{limit})" - else raise(ActiveRecordError, "No binary type has character length #{limit}") - end + def create_table_info(table_name) # :nodoc: + create_table_info_cache[table_name] ||= select_one("SHOW CREATE TABLE #{quote_table_name(table_name)}")["Create Table"] + end + + def create_table_definition(name, temporary = false, options = nil, as = nil) # :nodoc: + MySQL::TableDefinition.new(name, temporary, options, as) end def integer_to_sql(limit) # :nodoc: @@ -1016,8 +978,9 @@ module ActiveRecord when 1; 'tinyint' when 2; 'smallint' when 3; 'mediumint' - when nil, 4, 11; 'int(11)' # compatibility with MySQL default + when nil, 4; 'int' when 5..8; 'bigint' + when 11; 'int(11)' # backward compatibility with Rails 2.0 else raise(ActiveRecordError, "No integer type has byte size #{limit}") end end @@ -1028,7 +991,25 @@ module ActiveRecord when nil, 0x100..0xffff; 'text' when 0x10000..0xffffff; 'mediumtext' when 0x1000000..0xffffffff; 'longtext' - else raise(ActiveRecordError, "No text type has character length #{limit}") + else raise(ActiveRecordError, "No text type has byte length #{limit}") + end + end + + def binary_to_sql(limit) # :nodoc: + case limit + when 0..0xff; 'tinyblob' + when nil, 0x100..0xffff; 'blob' + when 0x10000..0xffffff; 'mediumblob' + when 0x1000000..0xffffffff; 'longblob' + else raise(ActiveRecordError, "No binary type has byte length #{limit}") + end + end + + class MysqlJson < Type::Internal::AbstractJson # :nodoc: + def changed_in_place?(raw_old_value, new_value) + # Normalization is required because MySQL JSON data format includes + # the space between the elements. + super(serialize(deserialize(raw_old_value)), new_value) end end @@ -1052,8 +1033,9 @@ module ActiveRecord end end - ActiveRecord::Type.register(:string, MysqlString, adapter: :mysql) + ActiveRecord::Type.register(:json, MysqlJson, adapter: :mysql2) ActiveRecord::Type.register(:string, MysqlString, adapter: :mysql2) + ActiveRecord::Type.register(:unsigned_integer, Type::UnsignedInteger, adapter: :mysql2) end end end diff --git a/activerecord/lib/active_record/connection_adapters/column.rb b/activerecord/lib/active_record/connection_adapters/column.rb index 4b95b0681d..81de7c03fb 100644 --- a/activerecord/lib/active_record/connection_adapters/column.rb +++ b/activerecord/lib/active_record/connection_adapters/column.rb @@ -5,25 +5,18 @@ module ActiveRecord module ConnectionAdapters # An abstract definition of a column in a table. class Column - FALSE_VALUES = [false, 0, '0', 'f', 'F', 'false', 'FALSE', 'off', 'OFF'].to_set - - module Format - ISO_DATE = /\A(\d{4})-(\d\d)-(\d\d)\z/ - ISO_DATETIME = /\A(\d{4})-(\d\d)-(\d\d) (\d\d):(\d\d):(\d\d)(\.\d+)?\z/ - end - attr_reader :name, :null, :sql_type_metadata, :default, :default_function, :collation delegate :precision, :scale, :limit, :type, :sql_type, to: :sql_type_metadata, allow_nil: true # Instantiates a new column in the table. # - # +name+ is the column's name, such as <tt>supplier_id</tt> in <tt>supplier_id int(11)</tt>. + # +name+ is the column's name, such as <tt>supplier_id</tt> in <tt>supplier_id int</tt>. # +default+ is the type-casted default value, such as +new+ in <tt>sales_stage varchar(20) default 'new'</tt>. # +sql_type_metadata+ is various information about the type of the column # +null+ determines if this column allows +NULL+ values. def initialize(name, default, sql_type_metadata = nil, null = true, default_function = nil, collation = nil) - @name = name + @name = name.freeze @sql_type_metadata = sql_type_metadata @null = null @default = default diff --git a/activerecord/lib/active_record/connection_adapters/connection_specification.rb b/activerecord/lib/active_record/connection_adapters/connection_specification.rb index 08d46fca96..f633892dee 100644 --- a/activerecord/lib/active_record/connection_adapters/connection_specification.rb +++ b/activerecord/lib/active_record/connection_adapters/connection_specification.rb @@ -175,7 +175,7 @@ module ActiveRecord rescue Gem::LoadError => e raise Gem::LoadError, "Specified '#{spec[:adapter]}' for database adapter, but the gem is not loaded. Add `gem '#{e.name}'` to your Gemfile (and ensure its version is at the minimum required by ActiveRecord)." rescue LoadError => e - raise LoadError, "Could not load '#{path_to_adapter}'. Make sure that the adapter in config/database.yml is valid. If you use an adapter other than 'mysql', 'mysql2', 'postgresql' or 'sqlite3' add the necessary adapter gem to the Gemfile.", e.backtrace + raise LoadError, "Could not load '#{path_to_adapter}'. Make sure that the adapter in config/database.yml is valid. If you use an adapter other than 'mysql2', 'postgresql' or 'sqlite3' add the necessary adapter gem to the Gemfile.", e.backtrace end adapter_method = "#{spec[:adapter]}_connection" diff --git a/activerecord/lib/active_record/connection_adapters/determine_if_preparable_visitor.rb b/activerecord/lib/active_record/connection_adapters/determine_if_preparable_visitor.rb new file mode 100644 index 0000000000..0fdc185c45 --- /dev/null +++ b/activerecord/lib/active_record/connection_adapters/determine_if_preparable_visitor.rb @@ -0,0 +1,22 @@ +module ActiveRecord + module ConnectionAdapters + module DetermineIfPreparableVisitor + attr_reader :preparable + + def accept(*) + @preparable = true + super + end + + def visit_Arel_Nodes_In(*) + @preparable = false + super + end + + def visit_Arel_Nodes_SqlLiteral(*) + @preparable = false + super + end + end + end +end diff --git a/activerecord/lib/active_record/connection_adapters/mysql/column.rb b/activerecord/lib/active_record/connection_adapters/mysql/column.rb new file mode 100644 index 0000000000..9c45fdd44a --- /dev/null +++ b/activerecord/lib/active_record/connection_adapters/mysql/column.rb @@ -0,0 +1,50 @@ +module ActiveRecord + module ConnectionAdapters + module MySQL + class Column < ConnectionAdapters::Column # :nodoc: + delegate :strict, :extra, to: :sql_type_metadata, allow_nil: true + + def initialize(*) + super + assert_valid_default + extract_default + end + + def has_default? + return false if blob_or_text_column? # MySQL forbids defaults on blob and text columns + super + end + + def blob_or_text_column? + /\A(?:tiny|medium|long)?blob\b/ === sql_type || type == :text + end + + def unsigned? + /\bunsigned\z/ === sql_type + end + + def case_sensitive? + collation && collation !~ /_ci\z/ + end + + def auto_increment? + extra == 'auto_increment' + end + + private + + def extract_default + if blob_or_text_column? + @default = null || strict ? nil : '' + end + end + + def assert_valid_default + if blob_or_text_column? && default.present? + raise ArgumentError, "#{type} columns cannot have a default value: #{default.inspect}" + end + end + end + end + end +end diff --git a/activerecord/lib/active_record/connection_adapters/mysql/schema_creation.rb b/activerecord/lib/active_record/connection_adapters/mysql/schema_creation.rb new file mode 100644 index 0000000000..1e2c859af9 --- /dev/null +++ b/activerecord/lib/active_record/connection_adapters/mysql/schema_creation.rb @@ -0,0 +1,57 @@ +module ActiveRecord + module ConnectionAdapters + module MySQL + class SchemaCreation < AbstractAdapter::SchemaCreation + private + + def visit_DropForeignKey(name) + "DROP FOREIGN KEY #{name}" + end + + def visit_ColumnDefinition(o) + o.sql_type = type_to_sql(o.type, o.limit, o.precision, o.scale, o.unsigned) + super + end + + def visit_AddColumnDefinition(o) + add_column_position!(super, column_options(o.column)) + end + + def visit_ChangeColumnDefinition(o) + change_column_sql = "CHANGE #{quote_column_name(o.name)} #{accept(o.column)}" + add_column_position!(change_column_sql, column_options(o.column)) + end + + def column_options(o) + column_options = super + column_options[:charset] = o.charset + column_options + end + + def add_column_options!(sql, options) + if options[:charset] + sql << " CHARACTER SET #{options[:charset]}" + end + if options[:collation] + sql << " COLLATE #{options[:collation]}" + end + super + end + + def add_column_position!(sql, options) + if options[:first] + sql << " FIRST" + elsif options[:after] + sql << " AFTER #{quote_column_name(options[:after])}" + end + sql + end + + def index_in_create(table_name, column_name, options) + index_name, index_type, index_columns, _, _, index_using = @conn.add_index_options(table_name, column_name, options) + "#{index_type} INDEX #{quote_column_name(index_name)} #{index_using} (#{index_columns}) " + end + end + end + end +end diff --git a/activerecord/lib/active_record/connection_adapters/mysql/schema_definitions.rb b/activerecord/lib/active_record/connection_adapters/mysql/schema_definitions.rb new file mode 100644 index 0000000000..157e75dbf7 --- /dev/null +++ b/activerecord/lib/active_record/connection_adapters/mysql/schema_definitions.rb @@ -0,0 +1,93 @@ +module ActiveRecord + module ConnectionAdapters + module MySQL + module ColumnMethods + def primary_key(name, type = :primary_key, **options) + options[:auto_increment] = true if type == :bigint && !options.key?(:default) + super + end + + def blob(*args, **options) + args.each { |name| column(name, :blob, options) } + end + + def tinyblob(*args, **options) + args.each { |name| column(name, :tinyblob, options) } + end + + def mediumblob(*args, **options) + args.each { |name| column(name, :mediumblob, options) } + end + + def longblob(*args, **options) + args.each { |name| column(name, :longblob, options) } + end + + def tinytext(*args, **options) + args.each { |name| column(name, :tinytext, options) } + end + + def mediumtext(*args, **options) + args.each { |name| column(name, :mediumtext, options) } + end + + def longtext(*args, **options) + args.each { |name| column(name, :longtext, options) } + end + + def json(*args, **options) + args.each { |name| column(name, :json, options) } + end + + def unsigned_integer(*args, **options) + args.each { |name| column(name, :unsigned_integer, options) } + end + + def unsigned_bigint(*args, **options) + args.each { |name| column(name, :unsigned_bigint, options) } + end + + def unsigned_float(*args, **options) + args.each { |name| column(name, :unsigned_float, options) } + end + + def unsigned_decimal(*args, **options) + args.each { |name| column(name, :unsigned_decimal, options) } + end + end + + class ColumnDefinition < ActiveRecord::ConnectionAdapters::ColumnDefinition + attr_accessor :charset, :unsigned + end + + class TableDefinition < ActiveRecord::ConnectionAdapters::TableDefinition + include ColumnMethods + + def new_column_definition(name, type, options) # :nodoc: + column = super + case column.type + when :primary_key + column.type = :integer + column.auto_increment = true + when /\Aunsigned_(?<type>.+)\z/ + column.type = $~[:type].to_sym + column.unsigned = true + end + column.unsigned ||= options[:unsigned] + column.charset = options[:charset] + column + end + + private + + def create_column_definition(name, type) + MySQL::ColumnDefinition.new(name, type) + end + end + + class Table < ActiveRecord::ConnectionAdapters::Table + include ColumnMethods + end + end + end +end diff --git a/activerecord/lib/active_record/connection_adapters/mysql/schema_dumper.rb b/activerecord/lib/active_record/connection_adapters/mysql/schema_dumper.rb new file mode 100644 index 0000000000..9dee3172f4 --- /dev/null +++ b/activerecord/lib/active_record/connection_adapters/mysql/schema_dumper.rb @@ -0,0 +1,59 @@ +module ActiveRecord + module ConnectionAdapters + module MySQL + module ColumnDumper + def column_spec_for_primary_key(column) + spec = {} + if column.bigint? + spec[:id] = ':bigint' + spec[:default] = schema_default(column) || 'nil' unless column.auto_increment? + spec[:unsigned] = 'true' if column.unsigned? + elsif column.auto_increment? + spec[:unsigned] = 'true' if column.unsigned? + return if spec.empty? + else + spec[:id] = column.type.inspect + spec.merge!(prepare_column_options(column).delete_if { |key, _| [:name, :type, :null].include?(key) }) + end + spec + end + + def prepare_column_options(column) + spec = super + spec[:unsigned] = 'true' if column.unsigned? + spec + end + + def migration_keys + super + [:unsigned] + end + + private + + def schema_type(column) + if column.sql_type == 'tinyblob' + 'blob' + else + super + end + end + + def schema_limit(column) + super unless column.type == :boolean + end + + def schema_precision(column) + super unless /time/ === column.sql_type && column.precision == 0 + end + + def schema_collation(column) + if column.collation && table_name = column.instance_variable_get(:@table_name) + @table_collation_cache ||= {} + @table_collation_cache[table_name] ||= select_one("SHOW TABLE STATUS LIKE '#{table_name}'")["Collation"] + column.collation.inspect if column.collation != @table_collation_cache[table_name] + end + end + end + end + end +end diff --git a/activerecord/lib/active_record/connection_adapters/mysql/type_metadata.rb b/activerecord/lib/active_record/connection_adapters/mysql/type_metadata.rb new file mode 100644 index 0000000000..e1e3f7b472 --- /dev/null +++ b/activerecord/lib/active_record/connection_adapters/mysql/type_metadata.rb @@ -0,0 +1,32 @@ +module ActiveRecord + module ConnectionAdapters + module MySQL + class TypeMetadata < DelegateClass(SqlTypeMetadata) # :nodoc: + attr_reader :extra, :strict + + def initialize(type_metadata, extra: "", strict: false) + super(type_metadata) + @type_metadata = type_metadata + @extra = extra + @strict = strict + end + + def ==(other) + other.is_a?(MySQL::TypeMetadata) && + attributes_for_hash == other.attributes_for_hash + end + alias eql? == + + def hash + attributes_for_hash.hash + end + + protected + + def attributes_for_hash + [self.class, @type_metadata, extra, strict] + end + end + end + end +end diff --git a/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb b/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb index e97e82f056..c3c5b660fd 100644 --- a/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb @@ -1,6 +1,6 @@ require 'active_record/connection_adapters/abstract_mysql_adapter' -gem 'mysql2', '~> 0.3.18' +gem 'mysql2', '>= 0.3.18', '< 0.5' require 'mysql2' module ActiveRecord @@ -10,17 +10,21 @@ module ActiveRecord config = config.symbolize_keys config[:username] = 'root' if config[:username].nil? + config[:flags] ||= 0 if Mysql2::Client.const_defined? :FOUND_ROWS - config[:flags] = Mysql2::Client::FOUND_ROWS + if config[:flags].kind_of? Array + config[:flags].push "FOUND_ROWS".freeze + else + config[:flags] |= Mysql2::Client::FOUND_ROWS + end end client = Mysql2::Client.new(config) - options = [config[:host], config[:username], config[:password], config[:database], config[:port], config[:socket], 0] - ConnectionAdapters::Mysql2Adapter.new(client, logger, options, config) + ConnectionAdapters::Mysql2Adapter.new(client, logger, nil, config) rescue Mysql2::Error => error if error.message.include?("Unknown database") - raise ActiveRecord::NoDatabaseError.new(error.message, error) + raise ActiveRecord::NoDatabaseError else raise end @@ -37,8 +41,8 @@ module ActiveRecord configure_connection end - def supports_explain? - true + def supports_json? + version >= '5.7.8' end # HELPER METHODS =========================================== @@ -95,112 +99,22 @@ module ActiveRecord # DATABASE STATEMENTS ====================================== #++ - def explain(arel, binds = []) - sql = "EXPLAIN #{to_sql(arel, binds.dup)}" - start = Time.now - result = exec_query(sql, 'EXPLAIN', binds) - elapsed = Time.now - start - - ExplainPrettyPrinter.new.pp(result, elapsed) - end - - class ExplainPrettyPrinter # :nodoc: - # Pretty prints the result of a EXPLAIN in a way that resembles the output of the - # MySQL shell: - # - # +----+-------------+-------+-------+---------------+---------+---------+-------+------+-------------+ - # | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | - # +----+-------------+-------+-------+---------------+---------+---------+-------+------+-------------+ - # | 1 | SIMPLE | users | const | PRIMARY | PRIMARY | 4 | const | 1 | | - # | 1 | SIMPLE | posts | ALL | NULL | NULL | NULL | NULL | 1 | Using where | - # +----+-------------+-------+-------+---------------+---------+---------+-------+------+-------------+ - # 2 rows in set (0.00 sec) - # - # This is an exercise in Ruby hyperrealism :). - def pp(result, elapsed) - widths = compute_column_widths(result) - separator = build_separator(widths) - - pp = [] - - pp << separator - pp << build_cells(result.columns, widths) - pp << separator - - result.rows.each do |row| - pp << build_cells(row, widths) - end - - pp << separator - pp << build_footer(result.rows.length, elapsed) - - pp.join("\n") + "\n" - end - - private - - def compute_column_widths(result) - [].tap do |widths| - result.columns.each_with_index do |column, i| - cells_in_column = [column] + result.rows.map {|r| r[i].nil? ? 'NULL' : r[i].to_s} - widths << cells_in_column.map(&:length).max - end - end - end - - def build_separator(widths) - padding = 1 - '+' + widths.map {|w| '-' * (w + (padding*2))}.join('+') + '+' - end - - def build_cells(items, widths) - cells = [] - items.each_with_index do |item, i| - item = 'NULL' if item.nil? - justifier = item.is_a?(Numeric) ? 'rjust' : 'ljust' - cells << item.to_s.send(justifier, widths[i]) - end - '| ' + cells.join(' | ') + ' |' - end - - def build_footer(nrows, elapsed) - rows_label = nrows == 1 ? 'row' : 'rows' - "#{nrows} #{rows_label} in set (%.2f sec)" % elapsed + # Returns a record hash with the column names as keys and column values + # as values. + def select_one(arel, name = nil, binds = []) + arel, binds = binds_from_relation(arel, binds) + execute(to_sql(arel, binds), name).each(as: :hash) do |row| + @connection.next_result while @connection.more_results? + return row end end - # FIXME: re-enable the following once a "better" query_cache solution is in core - # - # The overrides below perform much better than the originals in AbstractAdapter - # because we're able to take advantage of mysql2's lazy-loading capabilities - # - # # Returns a record hash with the column names as keys and column values - # # as values. - # def select_one(sql, name = nil) - # result = execute(sql, name) - # result.each(as: :hash) do |r| - # return r - # end - # end - # - # # Returns a single value from a record - # def select_value(sql, name = nil) - # result = execute(sql, name) - # if first = result.first - # first.first - # end - # end - # - # # Returns an array of the values of the first column in a select: - # # select_values("SELECT id FROM companies LIMIT 3") => [1,2,3] - # def select_values(sql, name = nil) - # execute(sql, name).map { |row| row.first } - # end - # Returns an array of arrays containing the field values. # Order is the same as that returned by +columns+. def select_rows(sql, name = nil, binds = []) - execute(sql, name).to_a + result = execute(sql, name) + @connection.next_result while @connection.more_results? + result.to_a end # Executes the SQL statement in the context of this connection. @@ -214,19 +128,14 @@ module ActiveRecord super end - def exec_query(sql, name = 'SQL', binds = []) + def exec_query(sql, name = 'SQL', binds = [], prepare: false) result = execute(sql, name) + @connection.next_result while @connection.more_results? ActiveRecord::Result.new(result.fields, result.to_a) end alias exec_without_stmt exec_query - def insert_sql(sql, name = nil, pk = nil, id_value = nil, sequence_name = nil) - super - id_value || @connection.last_id - end - alias :create :insert_sql - def exec_insert(sql, name, binds, pk = nil, sequence_name = nil) execute to_sql(sql, binds), name end @@ -254,11 +163,7 @@ module ActiveRecord end def full_version - @full_version ||= @connection.info[:version] - end - - def set_field_encoding field_name - field_name + @full_version ||= @connection.server_info[:version] end end end diff --git a/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb b/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb deleted file mode 100644 index 2ae462d773..0000000000 --- a/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb +++ /dev/null @@ -1,468 +0,0 @@ -require 'active_record/connection_adapters/abstract_mysql_adapter' -require 'active_record/connection_adapters/statement_pool' -require 'active_support/core_ext/hash/keys' - -gem 'mysql', '~> 2.9' -require 'mysql' - -class Mysql # :nodoc: all - class Time - # Used for casting DateTime fields to a MySQL friendly Time. - # This was documented in 48498da0dfed5239ea1eafb243ce47d7e3ce9e8e - def to_date - Date.new(year, month, day) - end - end - class Stmt; include Enumerable end - class Result; include Enumerable end -end - -module ActiveRecord - module ConnectionHandling # :nodoc: - # Establishes a connection to the database that's used by all Active Record objects. - def mysql_connection(config) - config = config.symbolize_keys - host = config[:host] - port = config[:port] - socket = config[:socket] - username = config[:username] ? config[:username].to_s : 'root' - password = config[:password].to_s - database = config[:database] - - mysql = Mysql.init - mysql.ssl_set(config[:sslkey], config[:sslcert], config[:sslca], config[:sslcapath], config[:sslcipher]) if config[:sslca] || config[:sslkey] - - default_flags = Mysql.const_defined?(:CLIENT_MULTI_RESULTS) ? Mysql::CLIENT_MULTI_RESULTS : 0 - default_flags |= Mysql::CLIENT_FOUND_ROWS if Mysql.const_defined?(:CLIENT_FOUND_ROWS) - options = [host, username, password, database, port, socket, default_flags] - ConnectionAdapters::MysqlAdapter.new(mysql, logger, options, config) - rescue Mysql::Error => error - if error.message.include?("Unknown database") - raise ActiveRecord::NoDatabaseError.new(error.message, error) - else - raise - end - end - end - - module ConnectionAdapters - # The MySQL adapter will work with both Ruby/MySQL, which is a Ruby-based MySQL adapter that comes bundled with Active Record, and with - # the faster C-based MySQL/Ruby adapter (available both as a gem and from http://www.tmtm.org/en/mysql/ruby/). - # - # Options: - # - # * <tt>:host</tt> - Defaults to "localhost". - # * <tt>:port</tt> - Defaults to 3306. - # * <tt>:socket</tt> - Defaults to "/tmp/mysql.sock". - # * <tt>:username</tt> - Defaults to "root" - # * <tt>:password</tt> - Defaults to nothing. - # * <tt>:database</tt> - The name of the database. No default, must be provided. - # * <tt>:encoding</tt> - (Optional) Sets the client encoding by executing "SET NAMES <encoding>" after connection. - # * <tt>:reconnect</tt> - Defaults to false (See MySQL documentation: http://dev.mysql.com/doc/refman/5.6/en/auto-reconnect.html). - # * <tt>:strict</tt> - Defaults to true. Enable STRICT_ALL_TABLES. (See MySQL documentation: http://dev.mysql.com/doc/refman/5.6/en/sql-mode.html) - # * <tt>:variables</tt> - (Optional) A hash session variables to send as <tt>SET @@SESSION.key = value</tt> on each database connection. Use the value +:default+ to set a variable to its DEFAULT value. (See MySQL documentation: http://dev.mysql.com/doc/refman/5.6/en/set-statement.html). - # * <tt>:sslca</tt> - Necessary to use MySQL with an SSL connection. - # * <tt>:sslkey</tt> - Necessary to use MySQL with an SSL connection. - # * <tt>:sslcert</tt> - Necessary to use MySQL with an SSL connection. - # * <tt>:sslcapath</tt> - Necessary to use MySQL with an SSL connection. - # * <tt>:sslcipher</tt> - Necessary to use MySQL with an SSL connection. - # - class MysqlAdapter < AbstractMysqlAdapter - ADAPTER_NAME = 'MySQL'.freeze - - class StatementPool < ConnectionAdapters::StatementPool - private - - def dealloc(stmt) - stmt[:stmt].close - end - end - - def initialize(connection, logger, connection_options, config) - super - @statements = StatementPool.new(@connection, - self.class.type_cast_config_to_integer(config.fetch(:statement_limit) { 1000 })) - @client_encoding = nil - connect - end - - # Returns true, since this connection adapter supports prepared statement - # caching. - def supports_statement_cache? - true - end - - # HELPER METHODS =========================================== - - def each_hash(result) # :nodoc: - if block_given? - result.each_hash do |row| - row.symbolize_keys! - yield row - end - else - to_enum(:each_hash, result) - end - end - - def error_number(exception) # :nodoc: - exception.errno if exception.respond_to?(:errno) - end - - # QUOTING ================================================== - - def quote_string(string) #:nodoc: - @connection.quote(string) - end - - #-- - # CONNECTION MANAGEMENT ==================================== - #++ - - def active? - if @connection.respond_to?(:stat) - @connection.stat - else - @connection.query 'select 1' - end - - # mysql-ruby doesn't raise an exception when stat fails. - if @connection.respond_to?(:errno) - @connection.errno.zero? - else - true - end - rescue Mysql::Error - false - end - - def reconnect! - super - disconnect! - connect - end - - # Disconnects from the database if already connected. Otherwise, this - # method does nothing. - def disconnect! - super - @connection.close rescue nil - end - - def reset! - if @connection.respond_to?(:change_user) - # See http://bugs.mysql.com/bug.php?id=33540 -- the workaround way to - # reset the connection is to change the user to the same user. - @connection.change_user(@config[:username], @config[:password], @config[:database]) - configure_connection - end - end - - #-- - # DATABASE STATEMENTS ====================================== - #++ - - def select_rows(sql, name = nil, binds = []) - @connection.query_with_result = true - rows = exec_query(sql, name, binds).rows - @connection.more_results && @connection.next_result # invoking stored procedures with CLIENT_MULTI_RESULTS requires this to tidy up else connection will be dropped - rows - end - - # Clears the prepared statements cache. - def clear_cache! - super - @statements.clear - end - - # Taken from here: - # https://github.com/tmtm/ruby-mysql/blob/master/lib/mysql/charset.rb - # Author: TOMITA Masahiro <tommy@tmtm.org> - ENCODINGS = { - "armscii8" => nil, - "ascii" => Encoding::US_ASCII, - "big5" => Encoding::Big5, - "binary" => Encoding::ASCII_8BIT, - "cp1250" => Encoding::Windows_1250, - "cp1251" => Encoding::Windows_1251, - "cp1256" => Encoding::Windows_1256, - "cp1257" => Encoding::Windows_1257, - "cp850" => Encoding::CP850, - "cp852" => Encoding::CP852, - "cp866" => Encoding::IBM866, - "cp932" => Encoding::Windows_31J, - "dec8" => nil, - "eucjpms" => Encoding::EucJP_ms, - "euckr" => Encoding::EUC_KR, - "gb2312" => Encoding::EUC_CN, - "gbk" => Encoding::GBK, - "geostd8" => nil, - "greek" => Encoding::ISO_8859_7, - "hebrew" => Encoding::ISO_8859_8, - "hp8" => nil, - "keybcs2" => nil, - "koi8r" => Encoding::KOI8_R, - "koi8u" => Encoding::KOI8_U, - "latin1" => Encoding::ISO_8859_1, - "latin2" => Encoding::ISO_8859_2, - "latin5" => Encoding::ISO_8859_9, - "latin7" => Encoding::ISO_8859_13, - "macce" => Encoding::MacCentEuro, - "macroman" => Encoding::MacRoman, - "sjis" => Encoding::SHIFT_JIS, - "swe7" => nil, - "tis620" => Encoding::TIS_620, - "ucs2" => Encoding::UTF_16BE, - "ujis" => Encoding::EucJP_ms, - "utf8" => Encoding::UTF_8, - "utf8mb4" => Encoding::UTF_8, - } - - # Get the client encoding for this database - def client_encoding - return @client_encoding if @client_encoding - - result = exec_query( - "SHOW VARIABLES WHERE Variable_name = 'character_set_client'", - 'SCHEMA') - @client_encoding = ENCODINGS[result.rows.last.last] - end - - def exec_query(sql, name = 'SQL', binds = []) - if without_prepared_statement?(binds) - result_set, affected_rows = exec_without_stmt(sql, name) - else - result_set, affected_rows = exec_stmt(sql, name, binds) - end - - yield affected_rows if block_given? - - result_set - end - - def last_inserted_id(result) - @connection.insert_id - end - - module Fields # :nodoc: - class DateTime < Type::DateTime # :nodoc: - def cast_value(value) - if Mysql::Time === value - new_time( - value.year, - value.month, - value.day, - value.hour, - value.minute, - value.second, - value.second_part) - else - super - end - end - end - - class Time < Type::Time # :nodoc: - def cast_value(value) - if Mysql::Time === value - new_time( - 2000, - 01, - 01, - value.hour, - value.minute, - value.second, - value.second_part) - else - super - end - end - end - - class << self - TYPES = Type::HashLookupTypeMap.new # :nodoc: - - delegate :register_type, :alias_type, to: :TYPES - - def find_type(field) - if field.type == Mysql::Field::TYPE_TINY && field.length > 1 - TYPES.lookup(Mysql::Field::TYPE_LONG) - else - TYPES.lookup(field.type) - end - end - end - - register_type Mysql::Field::TYPE_TINY, Type::Boolean.new - register_type Mysql::Field::TYPE_LONG, Type::Integer.new - alias_type Mysql::Field::TYPE_LONGLONG, Mysql::Field::TYPE_LONG - alias_type Mysql::Field::TYPE_NEWDECIMAL, Mysql::Field::TYPE_LONG - - register_type Mysql::Field::TYPE_DATE, Type::Date.new - register_type Mysql::Field::TYPE_DATETIME, Fields::DateTime.new - register_type Mysql::Field::TYPE_TIME, Fields::Time.new - register_type Mysql::Field::TYPE_FLOAT, Type::Float.new - end - - def initialize_type_map(m) # :nodoc: - super - register_class_with_precision m, %r(datetime)i, Fields::DateTime - register_class_with_precision m, %r(time)i, Fields::Time - end - - def exec_without_stmt(sql, name = 'SQL') # :nodoc: - # Some queries, like SHOW CREATE TABLE don't work through the prepared - # statement API. For those queries, we need to use this method. :'( - log(sql, name) do - result = @connection.query(sql) - affected_rows = @connection.affected_rows - - if result - types = {} - fields = [] - result.fetch_fields.each { |field| - field_name = field.name - fields << field_name - - if field.decimals > 0 - types[field_name] = Type::Decimal.new - else - types[field_name] = Fields.find_type field - end - } - - result_set = ActiveRecord::Result.new(fields, result.to_a, types) - result.free - else - result_set = ActiveRecord::Result.new([], []) - end - - [result_set, affected_rows] - end - end - - def execute_and_free(sql, name = nil) # :nodoc: - result = execute(sql, name) - ret = yield result - result.free - ret - end - - def insert_sql(sql, name = nil, pk = nil, id_value = nil, sequence_name = nil) #:nodoc: - super sql, name - id_value || @connection.insert_id - end - alias :create :insert_sql - - def exec_delete(sql, name, binds) # :nodoc: - affected_rows = 0 - - exec_query(sql, name, binds) do |n| - affected_rows = n - end - - affected_rows - end - alias :exec_update :exec_delete - - def begin_db_transaction #:nodoc: - exec_query "BEGIN" - end - - private - - def exec_stmt(sql, name, binds) - cache = {} - type_casted_binds = binds.map { |attr| type_cast(attr.value_for_database) } - - log(sql, name, binds) do - if binds.empty? - stmt = @connection.prepare(sql) - else - cache = @statements[sql] ||= { - :stmt => @connection.prepare(sql) - } - stmt = cache[:stmt] - end - - begin - stmt.execute(*type_casted_binds) - rescue Mysql::Error => e - # Older versions of MySQL leave the prepared statement in a bad - # place when an error occurs. To support older MySQL versions, we - # need to close the statement and delete the statement from the - # cache. - if binds.empty? - stmt.close - else - @statements.delete sql - end - raise e - end - - cols = nil - if metadata = stmt.result_metadata - cols = cache[:cols] ||= metadata.fetch_fields.map(&:name) - metadata.free - end - - result_set = ActiveRecord::Result.new(cols, stmt.to_a) if cols - affected_rows = stmt.affected_rows - - stmt.free_result - stmt.close if binds.empty? - - [result_set, affected_rows] - end - end - - def connect - encoding = @config[:encoding] - if encoding - @connection.options(Mysql::SET_CHARSET_NAME, encoding) rescue nil - end - - if @config[:sslca] || @config[:sslkey] - @connection.ssl_set(@config[:sslkey], @config[:sslcert], @config[:sslca], @config[:sslcapath], @config[:sslcipher]) - end - - @connection.options(Mysql::OPT_CONNECT_TIMEOUT, @config[:connect_timeout]) if @config[:connect_timeout] - @connection.options(Mysql::OPT_READ_TIMEOUT, @config[:read_timeout]) if @config[:read_timeout] - @connection.options(Mysql::OPT_WRITE_TIMEOUT, @config[:write_timeout]) if @config[:write_timeout] - - @connection.real_connect(*@connection_options) - - # reconnect must be set after real_connect is called, because real_connect sets it to false internally - @connection.reconnect = !!@config[:reconnect] if @connection.respond_to?(:reconnect=) - - configure_connection - end - - # Many Rails applications monkey-patch a replacement of the configure_connection method - # and don't call 'super', so leave this here even though it looks superfluous. - def configure_connection - super - end - - def select(sql, name = nil, binds = []) - @connection.query_with_result = true - rows = super - @connection.more_results && @connection.next_result # invoking stored procedures with CLIENT_MULTI_RESULTS requires this to tidy up else connection will be dropped - rows - end - - # Returns the full version of the connected MySQL server. - def full_version - @full_version ||= @connection.server_info - end - - def set_field_encoding field_name - field_name.force_encoding(client_encoding) - if internal_enc = Encoding.default_internal - field_name = field_name.encode!(internal_enc) - end - field_name - end - end - end -end diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb b/activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb index 11d3f5301a..6c15facf3b 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb @@ -8,7 +8,7 @@ module ActiveRecord end class ExplainPrettyPrinter # :nodoc: - # Pretty prints the result of a EXPLAIN in a way that resembles the output of the + # Pretty prints the result of an EXPLAIN in a way that resembles the output of the # PostgreSQL shell: # # QUERY PLAN @@ -52,8 +52,8 @@ module ActiveRecord end end - def select_values(arel, name = nil) - arel, binds = binds_from_relation arel, [] + def select_values(arel, name = nil, binds = []) + arel, binds = binds_from_relation arel, binds sql = to_sql(arel, binds) execute_and_clear(sql, name, binds) do |result| if result.nfields > 0 @@ -72,28 +72,6 @@ module ActiveRecord end end - # Executes an INSERT query and returns the new record's ID - def insert_sql(sql, name = nil, pk = nil, id_value = nil, sequence_name = nil) - unless pk - # Extract the table from the insert sql. Yuck. - table_ref = extract_table_ref_from_insert_sql(sql) - pk = primary_key(table_ref) if table_ref - end - - if pk && use_insert_returning? - select_value("#{sql} RETURNING #{quote_column_name(pk)}") - elsif pk - super - last_insert_id_value(sequence_name || default_sequence_name(table_ref, pk)) - else - super - end - end - - def create - super.insert - end - # The internal PostgreSQL identifier of the money data type. MONEY_COLUMN_TYPE_OID = 790 #:nodoc: # The internal PostgreSQL identifier of the BYTEA data type. @@ -156,8 +134,8 @@ module ActiveRecord end end - def exec_query(sql, name = 'SQL', binds = []) - execute_and_clear(sql, name, binds) do |result| + def exec_query(sql, name = 'SQL', binds = [], prepare: false) + execute_and_clear(sql, name, binds, prepare: prepare) do |result| types = {} fields = result.fields fields.each_with_index do |fname, i| @@ -174,7 +152,7 @@ module ActiveRecord end alias :exec_update :exec_delete - def sql_for_insert(sql, pk, id_value, sequence_name, binds) + def sql_for_insert(sql, pk, id_value, sequence_name, binds) # :nodoc: unless pk # Extract the table from the insert sql. Yuck. table_ref = extract_table_ref_from_insert_sql(sql) @@ -185,7 +163,7 @@ module ActiveRecord sql = "#{sql} RETURNING #{quote_column_name(pk)}" end - [sql, binds] + super end def exec_insert(sql, name, binds, pk = nil, sequence_name = nil) @@ -202,11 +180,6 @@ module ActiveRecord end end - # Executes an UPDATE query and returns the number of affected tuples. - def update_sql(sql, name = nil) - super.cmd_tuples - end - # Begins a transaction. def begin_db_transaction execute "BEGIN" diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid.rb index 92349e2f9b..68752cdd80 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/oid.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid.rb @@ -12,6 +12,7 @@ require 'active_record/connection_adapters/postgresql/oid/json' require 'active_record/connection_adapters/postgresql/oid/jsonb' require 'active_record/connection_adapters/postgresql/oid/money' require 'active_record/connection_adapters/postgresql/oid/point' +require 'active_record/connection_adapters/postgresql/oid/rails_5_1_point' require 'active_record/connection_adapters/postgresql/oid/range' require 'active_record/connection_adapters/postgresql/oid/specialized_string' require 'active_record/connection_adapters/postgresql/oid/uuid' diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/array.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/array.rb index 3de794f797..87593ef704 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/array.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/array.rb @@ -45,6 +45,15 @@ module ActiveRecord delimiter == other.delimiter end + def type_cast_for_schema(value) + return super unless value.is_a?(::Array) + "[" + value.map { |v| subtype.type_cast_for_schema(v) }.join(", ") + "]" + end + + def map(value, &block) + value.map(&block) + end + private def type_cast_array(value, method) diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/date_time.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/date_time.rb index 2c04c46131..424769f765 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/date_time.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/date_time.rb @@ -4,18 +4,14 @@ module ActiveRecord module OID # :nodoc: class DateTime < Type::DateTime # :nodoc: def cast_value(value) - if value.is_a?(::String) - case value - when 'infinity' then ::Float::INFINITY - when '-infinity' then -::Float::INFINITY - when / BC$/ - astronomical_year = format("%04d", -value[/^\d+/].to_i + 1) - super(value.sub(/ BC$/, "").sub(/^\d+/, astronomical_year)) - else - super - end + case value + when 'infinity' then ::Float::INFINITY + when '-infinity' then -::Float::INFINITY + when / BC$/ + astronomical_year = format("%04d", -value[/^\d+/].to_i + 1) + super(value.sub(/ BC$/, "").sub(/^\d+/, astronomical_year)) else - value + super end end end diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/json.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/json.rb index 8e1256baad..dbc879ffd4 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/json.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/json.rb @@ -2,32 +2,7 @@ module ActiveRecord module ConnectionAdapters module PostgreSQL module OID # :nodoc: - class Json < Type::Value # :nodoc: - include Type::Helpers::Mutable - - def type - :json - end - - def deserialize(value) - if value.is_a?(::String) - ::ActiveSupport::JSON.decode(value) rescue nil - else - value - end - end - - def serialize(value) - if value.is_a?(::Array) || value.is_a?(::Hash) - ::ActiveSupport::JSON.encode(value) - else - value - end - end - - def accessor - ActiveRecord::Store::StringKeyedHashAccessor - end + class Json < Type::Internal::AbstractJson end end end diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/jsonb.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/jsonb.rb index afc9383f91..87391b5dc7 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/jsonb.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/jsonb.rb @@ -9,7 +9,7 @@ module ActiveRecord def changed_in_place?(raw_old_value, new_value) # Postgres does not preserve insignificant whitespaces when - # roundtripping jsonb columns. This causes some false positives for + # round-tripping jsonb columns. This causes some false positives for # the comparison here. Therefore, we need to parse and re-dump the # raw value here to ensure the insignificant whitespaces are # consistent with our encoder's output. diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/rails_5_1_point.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/rails_5_1_point.rb new file mode 100644 index 0000000000..7427a25ad5 --- /dev/null +++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/rails_5_1_point.rb @@ -0,0 +1,50 @@ +module ActiveRecord + Point = Struct.new(:x, :y) + + module ConnectionAdapters + module PostgreSQL + module OID # :nodoc: + class Rails51Point < Type::Value # :nodoc: + include Type::Helpers::Mutable + + def type + :point + end + + def cast(value) + case value + when ::String + if value[0] == '(' && value[-1] == ')' + value = value[1...-1] + end + x, y = value.split(",") + build_point(x, y) + when ::Array + build_point(*value) + else + value + end + end + + def serialize(value) + if value.is_a?(ActiveRecord::Point) + "(#{number_for_point(value.x)},#{number_for_point(value.y)})" + else + super + end + end + + private + + def number_for_point(number) + number.to_s.gsub(/\.0$/, '') + end + + def build_point(x, y) + ActiveRecord::Point.new(Float(x), Float(y)) + end + end + end + end + end +end diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/range.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/range.rb index fc201f8fb9..a8d2310035 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/range.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/range.rb @@ -6,6 +6,7 @@ module ActiveRecord module OID # :nodoc: class Range < Type::Value # :nodoc: attr_reader :subtype, :type + delegate :user_input_in_time_zone, to: :subtype def initialize(subtype, type = :range) @subtype = subtype @@ -18,7 +19,7 @@ module ActiveRecord def cast_value(value) return if value == 'empty' - return value if value.is_a?(::Range) + return value unless value.is_a?(::String) extracted = extract_bounds(value) from = type_cast_single extracted[:from] @@ -46,6 +47,12 @@ module ActiveRecord other.type == type end + def map(value) # :nodoc: + new_begin = yield(value.begin) + new_end = yield(value.end) + ::Range.new(new_begin, new_end, value.exclude_end?) + end + private def type_cast_single(value) diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/type_map_initializer.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/type_map_initializer.rb index 191c828e60..6155e53632 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/type_map_initializer.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/type_map_initializer.rb @@ -36,7 +36,7 @@ module ActiveRecord WHERE t.typname IN (%s) OR t.typtype IN (%s) - OR t.typinput::varchar = 'array_in' + OR t.typinput = 'array_in(cstring,oid,integer)'::regprocedure OR t.typelem != 0 SQL end diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb b/activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb index f175730551..c1c77a967e 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb @@ -31,6 +31,11 @@ module ActiveRecord Utils.extract_schema_qualified_name(name.to_s).quoted end + # Quotes schema names for use in SQL queries. + def quote_schema_name(name) + PGconn.quote_ident(name) + end + def quote_table_name_for_assignment(table, attr) quote_column_name(attr) end @@ -50,10 +55,11 @@ module ActiveRecord end end - # Does not quote function default values for UUID columns - def quote_default_expression(value, column) #:nodoc: - if column.type == :uuid && value =~ /\(\)/ - value + def quote_default_expression(value, column) # :nodoc: + if value.is_a?(Proc) + value.call + elsif column.type == :uuid && value =~ /\(\)/ + value # Does not quote function default values for UUID columns elsif column.respond_to?(:array?) value = type_cast_from_column(column, value) quote(value) diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb b/activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb index 022dbdfa27..6399bddbee 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb @@ -103,6 +103,30 @@ module ActiveRecord args.each { |name| column(name, :point, options) } end + def line(*args, **options) + args.each { |name| column(name, :line, options) } + end + + def lseg(*args, **options) + args.each { |name| column(name, :lseg, options) } + end + + def box(*args, **options) + args.each { |name| column(name, :box, options) } + end + + def path(*args, **options) + args.each { |name| column(name, :path, options) } + end + + def polygon(*args, **options) + args.each { |name| column(name, :polygon, options) } + end + + def circle(*args, **options) + args.each { |name| column(name, :circle, options) } + end + def serial(*args, **options) args.each { |name| column(name, :serial, options) } end diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/schema_dumper.rb b/activerecord/lib/active_record/connection_adapters/postgresql/schema_dumper.rb new file mode 100644 index 0000000000..cc7721ddd8 --- /dev/null +++ b/activerecord/lib/active_record/connection_adapters/postgresql/schema_dumper.rb @@ -0,0 +1,50 @@ +module ActiveRecord + module ConnectionAdapters + module PostgreSQL + module ColumnDumper + def column_spec_for_primary_key(column) + spec = {} + if column.serial? + return unless column.bigint? + spec[:id] = ':bigserial' + elsif column.type == :uuid + spec[:id] = ':uuid' + spec[:default] = schema_default(column) || 'nil' + else + spec[:id] = column.type.inspect + spec.merge!(prepare_column_options(column).delete_if { |key, _| [:name, :type, :null].include?(key) }) + end + spec + end + + # Adds +:array+ option to the default set + def prepare_column_options(column) + spec = super + spec[:array] = 'true' if column.array? + spec + end + + # Adds +:array+ as a valid migration key + def migration_keys + super + [:array] + end + + private + + def schema_type(column) + return super unless column.serial? + + if column.bigint? + 'bigserial' + else + 'serial' + end + end + + def schema_expression(column) + super unless column.serial? + end + end + end + end +end diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb b/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb index 595c635fc0..67e727d8ed 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb @@ -68,15 +68,41 @@ module ActiveRecord execute "DROP DATABASE IF EXISTS #{quote_table_name(name)}" end - # Returns the list of all tables in the schema search path or a specified schema. + # Returns the list of all tables in the schema search path. def tables(name = nil) + if name + ActiveSupport::Deprecation.warn(<<-MSG.squish) + Passing arguments to #tables is deprecated without replacement. + MSG + end + select_values("SELECT tablename FROM pg_tables WHERE schemaname = ANY(current_schemas(false))", 'SCHEMA') end + def data_sources # :nodoc + select_values(<<-SQL, 'SCHEMA') + SELECT c.relname + FROM pg_class c + LEFT JOIN pg_namespace n ON n.oid = c.relnamespace + WHERE c.relkind IN ('r', 'v','m') -- (r)elation/table, (v)iew, (m)aterialized view + AND n.nspname = ANY (current_schemas(false)) + SQL + end + # Returns true if table exists. # If the schema is not specified as part of +name+ then it will only find tables within # the current schema search path (regardless of permissions to access tables in other schemas) def table_exists?(name) + ActiveSupport::Deprecation.warn(<<-MSG.squish) + #table_exists? currently checks both tables and views. + This behavior is deprecated and will be changed with Rails 5.1 to only check tables. + Use #data_source_exists? instead. + MSG + + data_source_exists?(name) + end + + def data_source_exists?(name) name = Utils.extract_schema_qualified_name(name.to_s) return false unless name.identifier @@ -90,6 +116,30 @@ module ActiveRecord SQL end + def views # :nodoc: + select_values(<<-SQL, 'SCHEMA') + SELECT c.relname + FROM pg_class c + LEFT JOIN pg_namespace n ON n.oid = c.relnamespace + WHERE c.relkind IN ('v','m') -- (v)iew, (m)aterialized view + AND n.nspname = ANY (current_schemas(false)) + SQL + end + + def view_exists?(view_name) # :nodoc: + name = Utils.extract_schema_qualified_name(view_name.to_s) + return false unless name.identifier + + select_values(<<-SQL, 'SCHEMA').any? + SELECT c.relname + FROM pg_class c + LEFT JOIN pg_namespace n ON n.oid = c.relnamespace + WHERE c.relkind IN ('v','m') -- (v)iew, (m)aterialized view + AND c.relname = '#{name.identifier}' + AND n.nspname = #{name.schema ? "'#{name.schema}'" : 'ANY (current_schemas(false))'} + SQL + end + def drop_table(table_name, options = {}) # :nodoc: execute "DROP TABLE#{' IF EXISTS' if options[:if_exists]} #{quote_table_name(table_name)}#{' CASCADE' if options[:force] == :cascade}" end @@ -101,29 +151,36 @@ module ActiveRecord # Verifies existence of an index with a given name. def index_name_exists?(table_name, index_name, default) + table = Utils.extract_schema_qualified_name(table_name.to_s) + index = Utils.extract_schema_qualified_name(index_name.to_s) + select_value(<<-SQL, 'SCHEMA').to_i > 0 SELECT COUNT(*) FROM pg_class t INNER JOIN pg_index d ON t.oid = d.indrelid INNER JOIN pg_class i ON d.indexrelid = i.oid + LEFT JOIN pg_namespace n ON n.oid = i.relnamespace WHERE i.relkind = 'i' - AND i.relname = '#{index_name}' - AND t.relname = '#{table_name}' - AND i.relnamespace IN (SELECT oid FROM pg_namespace WHERE nspname = ANY (current_schemas(false)) ) + AND i.relname = '#{index.identifier}' + AND t.relname = '#{table.identifier}' + AND n.nspname = #{index.schema ? "'#{index.schema}'" : 'ANY (current_schemas(false))'} SQL end # Returns an array of indexes for the given table. def indexes(table_name, name = nil) - result = query(<<-SQL, 'SCHEMA') - SELECT distinct i.relname, d.indisunique, d.indkey, pg_get_indexdef(d.indexrelid), t.oid - FROM pg_class t - INNER JOIN pg_index d ON t.oid = d.indrelid - INNER JOIN pg_class i ON d.indexrelid = i.oid - WHERE i.relkind = 'i' - AND d.indisprimary = 'f' - AND t.relname = '#{table_name}' - AND i.relnamespace IN (SELECT oid FROM pg_namespace WHERE nspname = ANY (current_schemas(false)) ) + table = Utils.extract_schema_qualified_name(table_name.to_s) + + result = query(<<-SQL, 'SCHEMA') + SELECT distinct i.relname, d.indisunique, d.indkey, pg_get_indexdef(d.indexrelid), t.oid + FROM pg_class t + INNER JOIN pg_index d ON t.oid = d.indrelid + INNER JOIN pg_class i ON d.indexrelid = i.oid + LEFT JOIN pg_namespace n ON n.oid = i.relnamespace + WHERE i.relkind = 'i' + AND d.indisprimary = 'f' + AND t.relname = '#{table.identifier}' + AND n.nspname = #{table.schema ? "'#{table.schema}'" : 'ANY (current_schemas(false))'} ORDER BY i.relname SQL @@ -210,12 +267,12 @@ module ActiveRecord # Creates a schema for the given schema name. def create_schema schema_name - execute "CREATE SCHEMA #{schema_name}" + execute "CREATE SCHEMA #{quote_schema_name(schema_name)}" end # Drops the schema for the given schema name. - def drop_schema schema_name - execute "DROP SCHEMA #{schema_name} CASCADE" + def drop_schema(schema_name, options = {}) + execute "DROP SCHEMA#{' IF EXISTS' if options[:if_exists]} #{quote_schema_name(schema_name)} CASCADE" end # Sets the schema search path to a string of comma-separated schema names. @@ -349,17 +406,19 @@ module ActiveRecord nil end - # Returns just a table's primary key - def primary_key(table) - pks = query(<<-end_sql, 'SCHEMA') - SELECT attr.attname - FROM pg_attribute attr - INNER JOIN pg_constraint cons ON attr.attrelid = cons.conrelid AND attr.attnum = any(cons.conkey) - WHERE cons.contype = 'p' - AND cons.conrelid = '#{quote_table_name(table)}'::regclass - end_sql - return nil unless pks.count == 1 - pks[0][0] + def primary_keys(table_name) # :nodoc: + select_values(<<-SQL.strip_heredoc, 'SCHEMA') + WITH pk_constraint AS ( + SELECT conrelid, unnest(conkey) AS connum FROM pg_constraint + WHERE contype = 'p' + AND conrelid = '#{quote_table_name(table_name)}'::regclass + ), cons AS ( + SELECT conrelid, connum, row_number() OVER() AS rownum FROM pk_constraint + ) + SELECT attr.attname FROM pg_attribute attr + INNER JOIN cons ON attr.attrelid = cons.conrelid AND attr.attnum = cons.connum + ORDER BY cons.rownum + SQL end # Renames a table. @@ -376,7 +435,7 @@ module ActiveRecord new_seq = "#{new_name}_#{pk}_seq" idx = "#{table_name}_pkey" new_idx = "#{new_name}_pkey" - execute "ALTER TABLE #{quote_table_name(seq)} RENAME TO #{quote_table_name(new_seq)}" + execute "ALTER TABLE #{seq.quoted} RENAME TO #{quote_table_name(new_seq)}" execute "ALTER INDEX #{quote_table_name(idx)} RENAME TO #{quote_table_name(new_idx)}" end @@ -410,11 +469,12 @@ module ActiveRecord end # Changes the default value of a table column. - def change_column_default(table_name, column_name, default) # :nodoc: + def change_column_default(table_name, column_name, default_or_changes) # :nodoc: clear_cache! column = column_for(table_name, column_name) return unless column + default = extract_new_default_value(default_or_changes) alter_column_query = "ALTER TABLE #{quote_table_name(table_name)} ALTER COLUMN #{quote_column_name(column_name)} %s" if default.nil? # <tt>DEFAULT NULL</tt> results in the same behavior as <tt>DROP DEFAULT</tt>. However, PostgreSQL will @@ -446,8 +506,28 @@ module ActiveRecord execute "CREATE #{index_type} INDEX #{index_algorithm} #{quote_column_name(index_name)} ON #{quote_table_name(table_name)} #{index_using} (#{index_columns})#{index_options}" end - def remove_index!(table_name, index_name) #:nodoc: - execute "DROP INDEX #{quote_table_name(index_name)}" + def remove_index(table_name, options = {}) #:nodoc: + table = Utils.extract_schema_qualified_name(table_name.to_s) + + if options.is_a?(Hash) && options.key?(:name) + provided_index = Utils.extract_schema_qualified_name(options[:name].to_s) + + options[:name] = provided_index.identifier + table = PostgreSQL::Name.new(provided_index.schema, table.identifier) unless table.schema.present? + + if provided_index.schema.present? && table.schema != provided_index.schema + raise ArgumentError.new("Index schema '#{provided_index.schema}' does not match table schema '#{table.schema}'") + end + end + + index_to_remove = PostgreSQL::Name.new(table.schema, index_name_for_remove(table.to_s, options)) + algorithm = + if options.is_a?(Hash) && options.key?(:algorithm) + index_algorithms.fetch(options[:algorithm]) do + raise ArgumentError.new("Algorithm must be one of the following: #{index_algorithms.keys.map(&:inspect).join(', ')}") + end + end + execute "DROP INDEX #{algorithm} #{quote_table_name(index_to_remove)}" end # Renames an index of a table. Raises error if length of new diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/type_metadata.rb b/activerecord/lib/active_record/connection_adapters/postgresql/type_metadata.rb index 58715978f7..b2c49989a4 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/type_metadata.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/type_metadata.rb @@ -12,7 +12,7 @@ module ActiveRecord end def sql_type - super.gsub(/\[\]$/, "") + super.gsub(/\[\]$/, "".freeze) end def ==(other) diff --git a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb index 93fa3984e6..2de6fbfaf0 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb @@ -9,6 +9,7 @@ require "active_record/connection_adapters/postgresql/oid" require "active_record/connection_adapters/postgresql/quoting" require "active_record/connection_adapters/postgresql/referential_integrity" require "active_record/connection_adapters/postgresql/schema_definitions" +require "active_record/connection_adapters/postgresql/schema_dumper" require "active_record/connection_adapters/postgresql/schema_statements" require "active_record/connection_adapters/postgresql/type_metadata" require "active_record/connection_adapters/postgresql/utils" @@ -18,12 +19,6 @@ require 'ipaddr' module ActiveRecord module ConnectionHandling # :nodoc: - VALID_CONN_PARAMS = [:host, :hostaddr, :port, :dbname, :user, :password, :connect_timeout, - :client_encoding, :options, :application_name, :fallback_application_name, - :keepalives, :keepalives_idle, :keepalives_interval, :keepalives_count, - :tty, :sslmode, :requiressl, :sslcompression, :sslcert, :sslkey, - :sslrootcert, :sslcrl, :requirepeer, :krbsrvname, :gsslib, :service] - # Establishes a connection to the database that's used by all Active Record objects def postgresql_connection(config) conn_params = config.symbolize_keys @@ -35,7 +30,8 @@ module ActiveRecord conn_params[:dbname] = conn_params.delete(:database) if conn_params[:database] # Forward only valid config params to PGconn.connect. - conn_params.keep_if { |k, _| VALID_CONN_PARAMS.include?(k) } + valid_conn_param_keys = PGconn.conndefaults_hash.keys + [:requiressl] + conn_params.slice!(*valid_conn_param_keys) # The postgres drivers don't allow the creation of an unconnected PGconn object, # so just pass a nil connection object for the time being. @@ -76,7 +72,6 @@ module ActiveRecord NATIVE_DATABASE_TYPES = { primary_key: "serial primary key", - bigserial: "bigserial", string: { name: "character varying" }, text: { name: "text" }, integer: { name: "integer" }, @@ -93,7 +88,6 @@ module ActiveRecord int8range: { name: "int8range" }, binary: { name: "bytea" }, boolean: { name: "boolean" }, - bigint: { name: "bigint" }, xml: { name: "xml" }, tsvector: { name: "tsvector" }, hstore: { name: "hstore" }, @@ -106,6 +100,12 @@ module ActiveRecord ltree: { name: "ltree" }, citext: { name: "citext" }, point: { name: "point" }, + line: { name: "line" }, + lseg: { name: "lseg" }, + box: { name: "box" }, + path: { name: "path" }, + polygon: { name: "polygon" }, + circle: { name: "circle" }, bit: { name: "bit" }, bit_varying: { name: "bit varying" }, money: { name: "money" }, @@ -117,61 +117,14 @@ module ActiveRecord include PostgreSQL::ReferentialIntegrity include PostgreSQL::SchemaStatements include PostgreSQL::DatabaseStatements + include PostgreSQL::ColumnDumper include Savepoints def schema_creation # :nodoc: PostgreSQL::SchemaCreation.new self end - def column_spec_for_primary_key(column) - spec = {} - if column.serial? - return unless column.bigint? - spec[:id] = ':bigserial' - elsif column.type == :uuid - spec[:id] = ':uuid' - spec[:default] = column.default_function.inspect - else - spec[:id] = column.type.inspect - spec.merge!(prepare_column_options(column).delete_if { |key, _| [:name, :type, :null].include?(key) }) - end - spec - end - - # Adds +:array+ option to the default set provided by the - # AbstractAdapter - def prepare_column_options(column) # :nodoc: - spec = super - spec[:array] = 'true' if column.array? - spec - end - - # Adds +:array+ as a valid migration key - def migration_keys - super + [:array] - end - - def schema_type(column) - return super unless column.serial? - - if column.bigint? - 'bigserial' - else - 'serial' - end - end - private :schema_type - - def schema_default(column) - if column.default_function - column.default_function.inspect unless column.serial? - else - super - end - end - private :schema_default - - # Returns +true+, since this connection adapter supports prepared statement + # Returns true, since this connection adapter supports prepared statement # caching. def supports_statement_cache? true @@ -201,13 +154,18 @@ module ActiveRecord true end + def supports_json? + postgresql_version >= 90200 + end + def index_algorithms { concurrently: 'CONCURRENTLY' } end class StatementPool < ConnectionAdapters::StatementPool def initialize(connection, max) - super + super(max) + @connection = connection @counter = 0 end @@ -234,16 +192,17 @@ module ActiveRecord # Initializes and connects a PostgreSQL adapter. def initialize(connection, logger, connection_parameters, config) - super(connection, logger) + super(connection, logger, config) @visitor = Arel::Visitors::PostgreSQL.new self if self.class.type_cast_config_to_boolean(config.fetch(:prepared_statements) { true }) @prepared_statements = true + @visitor.extend(DetermineIfPreparableVisitor) else @prepared_statements = false end - @connection_parameters, @config = connection_parameters, config + @connection_parameters = connection_parameters # @local_tz is initialized as nil to avoid warnings when connect tries to use it @local_tz = nil @@ -321,18 +280,18 @@ module ActiveRecord true end - # Enable standard-conforming strings if available. def set_standard_conforming_strings - old, self.client_min_messages = client_min_messages, 'panic' - execute('SET standard_conforming_strings = on', 'SCHEMA') rescue nil - ensure - self.client_min_messages = old + execute('SET standard_conforming_strings = on', 'SCHEMA') end def supports_ddl_transactions? true end + def supports_advisory_locks? + true + end + def supports_explain? true end @@ -351,6 +310,20 @@ module ActiveRecord postgresql_version >= 90300 end + def get_advisory_lock(lock_id) # :nodoc: + unless lock_id.is_a?(Integer) && lock_id.bit_length <= 63 + raise(ArgumentError, "Postgres requires advisory lock ids to be a signed 64 bit integer") + end + select_value("SELECT pg_try_advisory_lock(#{lock_id});") + end + + def release_advisory_lock(lock_id) # :nodoc: + unless lock_id.is_a?(Integer) && lock_id.bit_length <= 63 + raise(ArgumentError, "Postgres requires advisory lock ids to be a signed 64 bit integer") + end + select_value("SELECT pg_advisory_unlock(#{lock_id})") + end + def enable_extension(name) exec_query("CREATE EXTENSION IF NOT EXISTS \"#{name}\"").tap { reload_type_map @@ -417,12 +390,12 @@ module ActiveRecord "average" => "avg", } - protected + # Returns the version of the connected PostgreSQL server. + def postgresql_version + @connection.server_version + end - # Returns the version of the connected PostgreSQL server. - def postgresql_version - @connection.server_version - end + protected # See http://www.postgresql.org/docs/current/static/errcodes-appendix.html FOREIGN_KEY_VIOLATION = "23503" @@ -433,9 +406,9 @@ module ActiveRecord case exception.result.try(:error_field, PGresult::PG_DIAG_SQLSTATE) when UNIQUE_VIOLATION - RecordNotUnique.new(message, exception) + RecordNotUnique.new(message) when FOREIGN_KEY_VIOLATION - InvalidForeignKey.new(message, exception) + InvalidForeignKey.new(message) else super end @@ -488,15 +461,15 @@ module ActiveRecord m.register_type 'macaddr', OID::SpecializedString.new(:macaddr) m.register_type 'citext', OID::SpecializedString.new(:citext) m.register_type 'ltree', OID::SpecializedString.new(:ltree) + m.register_type 'line', OID::SpecializedString.new(:line) + m.register_type 'lseg', OID::SpecializedString.new(:lseg) + m.register_type 'box', OID::SpecializedString.new(:box) + m.register_type 'path', OID::SpecializedString.new(:path) + m.register_type 'polygon', OID::SpecializedString.new(:polygon) + m.register_type 'circle', OID::SpecializedString.new(:circle) # FIXME: why are we keeping these types as strings? m.alias_type 'interval', 'varchar' - m.alias_type 'path', 'varchar' - m.alias_type 'line', 'varchar' - m.alias_type 'polygon', 'varchar' - m.alias_type 'circle', 'varchar' - m.alias_type 'lseg', 'varchar' - m.alias_type 'box', 'varchar' register_class_with_precision m, 'time', Type::Time register_class_with_precision m, 'timestamp', OID::DateTime @@ -539,8 +512,13 @@ module ActiveRecord def extract_value_from_default(default) # :nodoc: case default # Quoted types - when /\A[\(B]?'(.*)'::/m - $1.gsub("''".freeze, "'".freeze) + when /\A[\(B]?'(.*)'.*::"?([\w. ]+)"?(?:\[\])?\z/m + # The default 'now'::date is CURRENT_DATE + if $1 == "now".freeze && $2 == "date".freeze + nil + else + $1.gsub("''".freeze, "'".freeze) + end # Boolean types when 'true'.freeze, 'false'.freeze default @@ -562,7 +540,7 @@ module ActiveRecord end def has_default_function?(default_value, default) # :nodoc: - !default_value && (%r{\w+\(.*\)} === default) + !default_value && (%r{\w+\(.*\)|\(.*\)::\w+} === default) end def load_additional_types(type_map, oids = nil) # :nodoc: @@ -594,16 +572,22 @@ module ActiveRecord FEATURE_NOT_SUPPORTED = "0A000" #:nodoc: - def execute_and_clear(sql, name, binds) - result = without_prepared_statement?(binds) ? exec_no_cache(sql, name, binds) : - exec_cache(sql, name, binds) + def execute_and_clear(sql, name, binds, prepare: false) + if without_prepared_statement?(binds) + result = exec_no_cache(sql, name, []) + elsif !prepare + result = exec_no_cache(sql, name, binds) + else + result = exec_cache(sql, name, binds) + end ret = yield result result.clear ret end def exec_no_cache(sql, name, binds) - log(sql, name, binds) { @connection.async_exec(sql, []) } + type_casted_binds = binds.map { |attr| type_cast(attr.value_for_database) } + log(sql, name, binds) { @connection.async_exec(sql, type_casted_binds) } end def exec_cache(sql, name, binds) @@ -614,7 +598,7 @@ module ActiveRecord @connection.exec_prepared(stmt_key, type_casted_binds) end rescue ActiveRecord::StatementInvalid => e - pgerror = e.original_exception + pgerror = e.cause # Get the PG code for the failure. Annoyingly, the code for # prepared statements whose return value may have changed is @@ -670,7 +654,7 @@ module ActiveRecord configure_connection rescue ::PG::Error => error if error.message.include?("does not exist") - raise ActiveRecord::NoDatabaseError.new(error.message, error) + raise ActiveRecord::NoDatabaseError else raise end @@ -685,7 +669,7 @@ module ActiveRecord self.client_min_messages = @config[:min_messages] || 'warning' self.schema_search_path = @config[:schema_search_path] || @config[:schema_order] - # Use standard-conforming strings if available so we don't have to do the E'...' dance. + # Use standard-conforming strings so we don't have to do the E'...' dance. set_standard_conforming_strings # If using Active Record's time zone support configure the connection to return @@ -711,15 +695,7 @@ module ActiveRecord end # Returns the current ID of a table's sequence. - def last_insert_id(sequence_name) #:nodoc: - Integer(last_insert_id_value(sequence_name)) - end - - def last_insert_id_value(sequence_name) - last_insert_id_result(sequence_name).rows.first.first - end - - def last_insert_id_result(sequence_name) #:nodoc: + def last_insert_id_result(sequence_name) # :nodoc: exec_query("SELECT currval('#{sequence_name}')", 'SQL') end @@ -756,12 +732,12 @@ module ActiveRecord end def extract_table_ref_from_insert_sql(sql) # :nodoc: - sql[/into\s+([^\(]*).*values\s*\(/im] + sql[/into\s("[A-Za-z0-9_."\[\]\s]+"|[A-Za-z0-9_."\[\]]+)\s*/im] $1.strip if $1 end def create_table_definition(name, temporary = false, options = nil, as = nil) # :nodoc: - PostgreSQL::TableDefinition.new native_database_types, name, temporary, options, as + PostgreSQL::TableDefinition.new(name, temporary, options, as) end def can_perform_case_insensitive_comparison_for?(column) @@ -837,7 +813,8 @@ module ActiveRecord ActiveRecord::Type.register(:json, OID::Json, adapter: :postgresql) ActiveRecord::Type.register(:jsonb, OID::Jsonb, adapter: :postgresql) ActiveRecord::Type.register(:money, OID::Money, adapter: :postgresql) - ActiveRecord::Type.register(:point, OID::Point, adapter: :postgresql) + ActiveRecord::Type.register(:point, OID::Rails51Point, adapter: :postgresql) + ActiveRecord::Type.register(:legacy_point, OID::Point, adapter: :postgresql) ActiveRecord::Type.register(:uuid, OID::Uuid, adapter: :postgresql) ActiveRecord::Type.register(:vector, OID::Vector, adapter: :postgresql) ActiveRecord::Type.register(:xml, OID::Xml, adapter: :postgresql) diff --git a/activerecord/lib/active_record/connection_adapters/schema_cache.rb b/activerecord/lib/active_record/connection_adapters/schema_cache.rb index 981d5d7a3c..eee142378c 100644 --- a/activerecord/lib/active_record/connection_adapters/schema_cache.rb +++ b/activerecord/lib/active_record/connection_adapters/schema_cache.rb @@ -10,7 +10,7 @@ module ActiveRecord @columns = {} @columns_hash = {} @primary_keys = {} - @tables = {} + @data_sources = {} end def initialize_dup(other) @@ -18,33 +18,38 @@ module ActiveRecord @columns = @columns.dup @columns_hash = @columns_hash.dup @primary_keys = @primary_keys.dup - @tables = @tables.dup + @data_sources = @data_sources.dup end def primary_keys(table_name) - @primary_keys[table_name] ||= table_exists?(table_name) ? connection.primary_key(table_name) : nil + @primary_keys[table_name] ||= data_source_exists?(table_name) ? connection.primary_key(table_name) : nil end # A cached lookup for table existence. - def table_exists?(name) - prepare_tables if @tables.empty? - return @tables[name] if @tables.key? name + def data_source_exists?(name) + prepare_data_sources if @data_sources.empty? + return @data_sources[name] if @data_sources.key? name - @tables[name] = connection.table_exists?(name) + @data_sources[name] = connection.data_source_exists?(name) end + alias table_exists? data_source_exists? + deprecate :table_exists? => "use #data_source_exists? instead" + # Add internal cache for table with +table_name+. def add(table_name) - if table_exists?(table_name) + if data_source_exists?(table_name) primary_keys(table_name) columns(table_name) columns_hash(table_name) end end - def tables(name) - @tables[name] + def data_sources(name) + @data_sources[name] end + alias tables data_sources + deprecate :tables => "use #data_sources instead" # Get the columns for a table def columns(table_name) @@ -64,36 +69,38 @@ module ActiveRecord @columns.clear @columns_hash.clear @primary_keys.clear - @tables.clear + @data_sources.clear @version = nil end def size - [@columns, @columns_hash, @primary_keys, @tables].map(&:size).inject :+ + [@columns, @columns_hash, @primary_keys, @data_sources].map(&:size).inject :+ end - # Clear out internal caches for table with +table_name+. - def clear_table_cache!(table_name) - @columns.delete table_name - @columns_hash.delete table_name - @primary_keys.delete table_name - @tables.delete table_name + # Clear out internal caches for the data source +name+. + def clear_data_source_cache!(name) + @columns.delete name + @columns_hash.delete name + @primary_keys.delete name + @data_sources.delete name end + alias clear_table_cache! clear_data_source_cache! + deprecate :clear_table_cache! => "use #clear_data_source_cache! instead" def marshal_dump # if we get current version during initialization, it happens stack over flow. @version = ActiveRecord::Migrator.current_version - [@version, @columns, @columns_hash, @primary_keys, @tables] + [@version, @columns, @columns_hash, @primary_keys, @data_sources] end def marshal_load(array) - @version, @columns, @columns_hash, @primary_keys, @tables = array + @version, @columns, @columns_hash, @primary_keys, @data_sources = array end private - def prepare_tables - connection.tables.each { |table| @tables[table] = true } + def prepare_data_sources + connection.data_sources.each { |source| @data_sources[source] = true } end end end diff --git a/activerecord/lib/active_record/connection_adapters/sqlite3/schema_creation.rb b/activerecord/lib/active_record/connection_adapters/sqlite3/schema_creation.rb new file mode 100644 index 0000000000..fe1dcbd710 --- /dev/null +++ b/activerecord/lib/active_record/connection_adapters/sqlite3/schema_creation.rb @@ -0,0 +1,15 @@ +module ActiveRecord + module ConnectionAdapters + module SQLite3 + class SchemaCreation < AbstractAdapter::SchemaCreation + private + def add_column_options!(sql, options) + if options[:collation] + sql << " COLLATE \"#{options[:collation]}\"" + end + super + end + end + end + end +end diff --git a/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb b/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb index 7faca9cb70..d1893f35f5 100644 --- a/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb @@ -1,5 +1,6 @@ require 'active_record/connection_adapters/abstract_adapter' require 'active_record/connection_adapters/statement_pool' +require 'active_record/connection_adapters/sqlite3/schema_creation' gem 'sqlite3', '~> 1.3.6' require 'sqlite3' @@ -32,7 +33,7 @@ module ActiveRecord ConnectionAdapters::SQLite3Adapter.new(db, logger, nil, config) rescue Errno::ENOENT => error if error.message.include?("No such file or directory") - raise ActiveRecord::NoDatabaseError.new(error.message, error) + raise ActiveRecord::NoDatabaseError else raise end @@ -64,18 +65,6 @@ module ActiveRecord boolean: { name: "boolean" } } - class Version - include Comparable - - def initialize(version_string) - @version = version_string.split('.').map(&:to_i) - end - - def <=>(version_string) - @version <=> version_string.split('.').map(&:to_i) - end - end - class StatementPool < ConnectionAdapters::StatementPool private @@ -84,19 +73,22 @@ module ActiveRecord end end + def schema_creation # :nodoc: + SQLite3::SchemaCreation.new self + end + def initialize(connection, logger, connection_options, config) - super(connection, logger) + super(connection, logger, config) @active = nil - @statements = StatementPool.new(@connection, - self.class.type_cast_config_to_integer(config.fetch(:statement_limit) { 1000 })) - @config = config + @statements = StatementPool.new(self.class.type_cast_config_to_integer(config.fetch(:statement_limit) { 1000 })) @visitor = Arel::Visitors::SQLite.new self @quoted_column_names = {} if self.class.type_cast_config_to_boolean(config.fetch(:prepared_statements) { true }) @prepared_statements = true + @visitor.extend(DetermineIfPreparableVisitor) else @prepared_statements = false end @@ -137,6 +129,10 @@ module ActiveRecord true end + def supports_datetime_with_precision? + true + end + def active? @active != false end @@ -226,7 +222,7 @@ module ActiveRecord end class ExplainPrettyPrinter - # Pretty prints the result of a EXPLAIN QUERY PLAN in a way that resembles + # Pretty prints the result of an EXPLAIN QUERY PLAN in a way that resembles # the output of the SQLite shell: # # 0|0|0|SEARCH TABLE users USING INTEGER PRIMARY KEY (rowid=?) (~1 rows) @@ -239,15 +235,18 @@ module ActiveRecord end end - def exec_query(sql, name = nil, binds = []) + def exec_query(sql, name = nil, binds = [], prepare: false) type_casted_binds = binds.map { |attr| type_cast(attr.value_for_database) } log(sql, name, binds) do # Don't cache statements if they are not prepared - if without_prepared_statement?(binds) + unless prepare stmt = @connection.prepare(sql) begin cols = stmt.columns + unless without_prepared_statement?(binds) + stmt.bind_params(type_casted_binds) + end records = stmt.to_a ensure stmt.close @@ -260,7 +259,7 @@ module ActiveRecord stmt = cache[:stmt] cols = cache[:cols] ||= stmt.columns stmt.reset! - stmt.bind_params type_casted_binds + stmt.bind_params(type_casted_binds) end ActiveRecord::Result.new(cols, stmt.to_a) @@ -281,22 +280,6 @@ module ActiveRecord log(sql, name) { @connection.execute(sql) } end - def update_sql(sql, name = nil) #:nodoc: - super - @connection.changes - end - - def delete_sql(sql, name = nil) #:nodoc: - sql += " WHERE 1=1" unless sql =~ /WHERE/i - super sql, name - end - - def insert_sql(sql, name = nil, pk = nil, id_value = nil, sequence_name = nil) #:nodoc: - super - id_value || @connection.last_insert_row_id - end - alias :create :insert_sql - def select_rows(sql, name = nil, binds = []) exec_query(sql, name, binds).rows end @@ -315,21 +298,56 @@ module ActiveRecord # SCHEMA STATEMENTS ======================================== - def tables(name = nil, table_name = nil) #:nodoc: - sql = <<-SQL - SELECT name - FROM sqlite_master - WHERE (type = 'table' OR type = 'view') AND NOT name = 'sqlite_sequence' - SQL - sql << " AND name = #{quote_table_name(table_name)}" if table_name - - exec_query(sql, 'SCHEMA').map do |row| - row['name'] + def tables(name = nil) # :nodoc: + ActiveSupport::Deprecation.warn(<<-MSG.squish) + #tables currently returns both tables and views. + This behavior is deprecated and will be changed with Rails 5.1 to only return tables. + Use #data_sources instead. + MSG + + if name + ActiveSupport::Deprecation.warn(<<-MSG.squish) + Passing arguments to #tables is deprecated without replacement. + MSG end + + data_sources + end + + def data_sources + select_values("SELECT name FROM sqlite_master WHERE type IN ('table','view') AND name <> 'sqlite_sequence'", 'SCHEMA') end def table_exists?(table_name) - table_name && tables(nil, table_name).any? + ActiveSupport::Deprecation.warn(<<-MSG.squish) + #table_exists? currently checks both tables and views. + This behavior is deprecated and will be changed with Rails 5.1 to only check tables. + Use #data_source_exists? instead. + MSG + + data_source_exists?(table_name) + end + + def data_source_exists?(table_name) + return false unless table_name.present? + + sql = "SELECT name FROM sqlite_master WHERE type IN ('table','view') AND name <> 'sqlite_sequence'" + sql << " AND name = #{quote(table_name)}" + + select_values(sql, 'SCHEMA').any? + end + + def views # :nodoc: + select_values("SELECT name FROM sqlite_master WHERE type = 'view' AND name <> 'sqlite_sequence'", 'SCHEMA') + end + + def view_exists?(view_name) # :nodoc: + return false unless view_name.present? + + sql = "SELECT name FROM sqlite_master WHERE type = 'view' AND name <> 'sqlite_sequence'" + sql << " AND name = #{quote(view_name)}" + + select_values(sql, 'SCHEMA').any? end # Returns an array of +Column+ objects for the table specified by +table_name+. @@ -344,9 +362,10 @@ module ActiveRecord field["dflt_value"] = $1.gsub('""', '"') end + collation = field['collation'] sql_type = field['type'] type_metadata = fetch_type_metadata(sql_type) - new_column(field['name'], field['dflt_value'], type_metadata, field['notnull'].to_i == 0) + new_column(field['name'], field['dflt_value'], type_metadata, field['notnull'].to_i == 0, nil, collation) end end @@ -375,13 +394,13 @@ module ActiveRecord end end - def primary_key(table_name) #:nodoc: + def primary_keys(table_name) # :nodoc: pks = table_structure(table_name).select { |f| f['pk'] > 0 } - return nil unless pks.count == 1 - pks[0]['name'] + pks.sort_by { |f| f['pk'] }.map { |f| f['name'] } end - def remove_index!(table_name, index_name) #:nodoc: + def remove_index(table_name, options = {}) #:nodoc: + index_name = index_name_for_remove(table_name, options) exec_query "DROP INDEX #{quote_column_name(index_name)}" end @@ -416,7 +435,9 @@ module ActiveRecord end end - def change_column_default(table_name, column_name, default) #:nodoc: + def change_column_default(table_name, column_name, default_or_changes) #:nodoc: + default = extract_new_default_value(default_or_changes) + alter_table(table_name) do |definition| definition[column_name].default = default end @@ -441,6 +462,7 @@ module ActiveRecord self.null = options[:null] if options.include?(:null) self.precision = options[:precision] if options.include?(:precision) self.scale = options[:scale] if options.include?(:scale) + self.collation = options[:collation] if options.include?(:collation) end end end @@ -454,9 +476,9 @@ module ActiveRecord protected def table_structure(table_name) - structure = exec_query("PRAGMA table_info(#{quote_table_name(table_name)})", 'SCHEMA').to_hash + structure = exec_query("PRAGMA table_info(#{quote_table_name(table_name)})", 'SCHEMA') raise(ActiveRecord::StatementInvalid, "Could not find table '#{table_name}'") if structure.empty? - structure + table_structure_with_collation(table_name, structure) end def alter_table(table_name, options = {}) #:nodoc: @@ -491,7 +513,7 @@ module ActiveRecord @definition.column(column_name, column.type, :limit => column.limit, :default => column.default, :precision => column.precision, :scale => column.scale, - :null => column.null) + :null => column.null, collation: column.collation) end yield @definition if block_given? end @@ -548,11 +570,51 @@ module ActiveRecord # Older versions of SQLite return: # column *column_name* is not unique when /column(s)? .* (is|are) not unique/, /UNIQUE constraint failed: .*/ - RecordNotUnique.new(message, exception) + RecordNotUnique.new(message) else super end end + + private + COLLATE_REGEX = /.*\"(\w+)\".*collate\s+\"(\w+)\".*/i.freeze + + def table_structure_with_collation(table_name, basic_structure) + collation_hash = {} + sql = "SELECT sql FROM + (SELECT * FROM sqlite_master UNION ALL + SELECT * FROM sqlite_temp_master) + WHERE type='table' and name='#{ table_name }' \;" + + # Result will have following sample string + # CREATE TABLE "users" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, + # "password_digest" varchar COLLATE "NOCASE"); + result = exec_query(sql, 'SCHEMA').first + + if result + # Splitting with left parantheses and picking up last will return all + # columns separated with comma(,). + columns_string = result["sql"].split('(').last + + columns_string.split(',').each do |column_string| + # This regex will match the column name and collation type and will save + # the value in $1 and $2 respectively. + collation_hash[$1] = $2 if (COLLATE_REGEX =~ column_string) + end + + basic_structure.map! do |column| + column_name = column['name'] + + if collation_hash.has_key? column_name + column['collation'] = collation_hash[column_name] + end + + column + end + else + basic_structure.to_hash + end + end end end end diff --git a/activerecord/lib/active_record/connection_adapters/statement_pool.rb b/activerecord/lib/active_record/connection_adapters/statement_pool.rb index 82e9ef3d3d..57463dd749 100644 --- a/activerecord/lib/active_record/connection_adapters/statement_pool.rb +++ b/activerecord/lib/active_record/connection_adapters/statement_pool.rb @@ -3,10 +3,9 @@ module ActiveRecord class StatementPool include Enumerable - def initialize(connection, max = 1000) + def initialize(max = 1000) @cache = Hash.new { |h,pid| h[pid] = {} } - @connection = connection - @max = max + @max = max end def each(&block) diff --git a/activerecord/lib/active_record/connection_handling.rb b/activerecord/lib/active_record/connection_handling.rb index d6b661ff76..a8b3d03ba5 100644 --- a/activerecord/lib/active_record/connection_handling.rb +++ b/activerecord/lib/active_record/connection_handling.rb @@ -8,7 +8,7 @@ module ActiveRecord # example for regular databases (MySQL, PostgreSQL, etc): # # ActiveRecord::Base.establish_connection( - # adapter: "mysql", + # adapter: "mysql2", # host: "localhost", # username: "myuser", # password: "mypass", @@ -35,14 +35,14 @@ module ActiveRecord # "postgres://myuser:mypass@localhost/somedatabase" # ) # - # In case <tt>ActiveRecord::Base.configurations</tt> is set (Rails - # automatically loads the contents of config/database.yml into it), + # In case {ActiveRecord::Base.configurations}[rdoc-ref:Core.configurations] + # is set (Rails automatically loads the contents of config/database.yml into it), # a symbol can also be given as argument, representing a key in the # configuration hash: # # ActiveRecord::Base.establish_connection(:production) # - # The exceptions AdapterNotSpecified, AdapterNotFound and ArgumentError + # The exceptions AdapterNotSpecified, AdapterNotFound and +ArgumentError+ # may be returned on an error. def establish_connection(spec = nil) spec ||= DEFAULT_ENV.call.to_sym diff --git a/activerecord/lib/active_record/core.rb b/activerecord/lib/active_record/core.rb index 8a014e682e..475a298467 100644 --- a/activerecord/lib/active_record/core.rb +++ b/activerecord/lib/active_record/core.rb @@ -162,11 +162,13 @@ module ActiveRecord } record = statement.execute([id], self, connection).first unless record - raise RecordNotFound, "Couldn't find #{name} with '#{primary_key}'=#{id}" + raise RecordNotFound.new("Couldn't find #{name} with '#{primary_key}'=#{id}", + name, primary_key, id) end record rescue RangeError - raise RecordNotFound, "Couldn't find #{name} with an out of range value for '#{primary_key}'" + raise RecordNotFound.new("Couldn't find #{name} with an out of range value for '#{primary_key}'", + name, primary_key) end def find_by(*args) # :nodoc: @@ -175,7 +177,7 @@ module ActiveRecord hash = args.first return super if hash.values.any? { |v| - v.nil? || Array === v || Hash === v + v.nil? || Array === v || Hash === v || Relation === v } # We can't cache Post.find_by(author: david) ...yet @@ -191,15 +193,15 @@ module ActiveRecord } begin statement.execute(hash.values, self, connection).first - rescue TypeError => e - raise ActiveRecord::StatementInvalid.new(e.message, e) + rescue TypeError + raise ActiveRecord::StatementInvalid rescue RangeError nil end end def find_by!(*args) # :nodoc: - find_by(*args) or raise RecordNotFound.new("Couldn't find #{name}") + find_by(*args) or raise RecordNotFound.new("Couldn't find #{name}", name) end def initialize_generated_modules # :nodoc: @@ -273,7 +275,7 @@ module ActiveRecord def relation # :nodoc: relation = Relation.create(self, arel_table, predicate_builder) - if finder_needs_type_condition? + if finder_needs_type_condition? && !ignore_default_scope? relation.where(type_condition).create_with(inheritance_column.to_sym => sti_name) else relation @@ -294,7 +296,7 @@ module ActiveRecord # # Instantiates a single new object # User.new(first_name: 'Jamie') def initialize(attributes = nil) - @attributes = self.class._default_attributes.dup + @attributes = self.class._default_attributes.deep_dup self.class.define_attribute_methods init_internals @@ -303,12 +305,12 @@ module ActiveRecord assign_attributes(attributes) if attributes yield self if block_given? - run_callbacks :initialize + _run_initialize_callbacks end # Initialize an empty model object from +coder+. +coder+ should be # the result of previously encoding an Active Record model, using - # `encode_with` + # #encode_with. # # class Post < ActiveRecord::Base # end @@ -330,8 +332,8 @@ module ActiveRecord self.class.define_attribute_methods - run_callbacks :find - run_callbacks :initialize + _run_find_callbacks + _run_initialize_callbacks self end @@ -364,10 +366,10 @@ module ActiveRecord ## def initialize_dup(other) # :nodoc: - @attributes = @attributes.dup + @attributes = @attributes.deep_dup @attributes.reset(self.class.primary_key) - run_callbacks(:initialize) + _run_initialize_callbacks @new_record = true @destroyed = false @@ -377,7 +379,7 @@ module ActiveRecord # Populate +coder+ with attributes about this record that should be # serialized. The structure of +coder+ defined in this method is - # guaranteed to match the structure of +coder+ passed to the +init_with+ + # guaranteed to match the structure of +coder+ passed to the #init_with # method. # # Example: @@ -475,7 +477,7 @@ module ActiveRecord "#<#{self.class} #{inspection}>" end - # Takes a PP and prettily prints this record to it, allowing you to get a nice result from `pp record` + # Takes a PP and prettily prints this record to it, allowing you to get a nice result from <tt>pp record</tt> # when pp is required. def pretty_print(pp) return super if custom_inspect_method_defined? diff --git a/activerecord/lib/active_record/counter_cache.rb b/activerecord/lib/active_record/counter_cache.rb index 82596b63df..9e7d391c70 100644 --- a/activerecord/lib/active_record/counter_cache.rb +++ b/activerecord/lib/active_record/counter_cache.rb @@ -45,14 +45,14 @@ module ActiveRecord end # A generic "counter updater" implementation, intended primarily to be - # used by increment_counter and decrement_counter, but which may also + # used by #increment_counter and #decrement_counter, but which may also # be useful on its own. It simply does a direct SQL update for the record # with the given ID, altering the given hash of counters by the amount # given by the corresponding value: # # ==== Parameters # - # * +id+ - The id of the object you wish to update a counter on or an Array of ids. + # * +id+ - The id of the object you wish to update a counter on or an array of ids. # * +counters+ - A Hash containing the names of the fields # to update as keys and the amount to update the field by as values. # @@ -86,14 +86,14 @@ module ActiveRecord # Increment a numeric field by one, via a direct SQL update. # # This method is used primarily for maintaining counter_cache columns that are - # used to store aggregate values. For example, a DiscussionBoard may cache + # used to store aggregate values. For example, a +DiscussionBoard+ may cache # posts_count and comments_count to avoid running an SQL query to calculate the # number of posts and comments there are, each time it is displayed. # # ==== Parameters # # * +counter_name+ - The name of the field that should be incremented. - # * +id+ - The id of the object that should be incremented or an Array of ids. + # * +id+ - The id of the object that should be incremented or an array of ids. # # ==== Examples # @@ -105,13 +105,13 @@ module ActiveRecord # Decrement a numeric field by one, via a direct SQL update. # - # This works the same as increment_counter but reduces the column value by + # This works the same as #increment_counter but reduces the column value by # 1 instead of increasing it. # # ==== Parameters # # * +counter_name+ - The name of the field that should be decremented. - # * +id+ - The id of the object that should be decremented or an Array of ids. + # * +id+ - The id of the object that should be decremented or an array of ids. # # ==== Examples # diff --git a/activerecord/lib/active_record/enum.rb b/activerecord/lib/active_record/enum.rb index 2b99899e42..8655f68308 100644 --- a/activerecord/lib/active_record/enum.rb +++ b/activerecord/lib/active_record/enum.rb @@ -18,10 +18,9 @@ module ActiveRecord # conversation.archived? # => true # conversation.status # => "archived" # - # # conversation.update! status: 1 + # # conversation.status = 1 # conversation.status = "archived" # - # # conversation.update! status: nil # conversation.status = nil # conversation.status.nil? # => true # conversation.status # => nil @@ -47,13 +46,13 @@ module ActiveRecord # Good practice is to let the first declared status be the default. # # Finally, it's also possible to explicitly map the relation between attribute and - # database integer with a +Hash+: + # database integer with a hash: # # class Conversation < ActiveRecord::Base # enum status: { active: 0, archived: 1 } # end # - # Note that when an +Array+ is used, the implicit mapping from the values to database + # Note that when an array is used, the implicit mapping from the values to database # integers is derived from the order the values appear in the array. In the example, # <tt>:active</tt> is mapped to +0+ as it's the first element, and <tt>:archived</tt> # is mapped to +1+. In general, the +i+-th element is mapped to <tt>i-1</tt> in the @@ -61,7 +60,7 @@ module ActiveRecord # # Therefore, once a value is added to the enum array, its position in the array must # be maintained, and new values should only be added to the end of the array. To - # remove unused values, the explicit +Hash+ syntax should be used. + # remove unused values, the explicit hash syntax should be used. # # In rare circumstances you might need to access the mapping directly. # The mappings are exposed through a class method with the pluralized attribute @@ -75,6 +74,24 @@ module ActiveRecord # # Conversation.where("status <> ?", Conversation.statuses[:archived]) # + # You can use the +:_prefix+ or +:_suffix+ options when you need to define + # multiple enums with same values. If the passed value is +true+, the methods + # are prefixed/suffixed with the name of the enum. It is also possible to + # supply a custom value: + # + # class Conversation < ActiveRecord::Base + # enum status: [:active, :archived], _suffix: true + # enum comments_status: [:active, :inactive], _prefix: :comments + # end + # + # With the above example, the bang and predicate methods along with the + # associated scopes are now prefixed and/or suffixed accordingly: + # + # conversation.active_status! + # conversation.archived_status? # => false + # + # conversation.comments_inactive! + # conversation.comments_active? # => false module Enum def self.extended(base) # :nodoc: @@ -87,7 +104,7 @@ module ActiveRecord super end - class EnumType < Type::Value + class EnumType < Type::Value # :nodoc: def initialize(name, mapping) @name = name @mapping = mapping @@ -101,19 +118,25 @@ module ActiveRecord elsif mapping.has_value?(value) mapping.key(value) else - raise ArgumentError, "'#{value}' is not a valid #{name}" + assert_valid_value(value) end end def deserialize(value) return if value.nil? - mapping.key(value.to_i) + mapping.key(value) end def serialize(value) mapping.fetch(value, value) end + def assert_valid_value(value) + unless value.blank? || mapping.has_key?(value) || mapping.has_value?(value) + raise ArgumentError, "'#{value}' is not a valid #{name}" + end + end + protected attr_reader :name, :mapping @@ -121,6 +144,8 @@ module ActiveRecord def enum(definitions) klass = self + enum_prefix = definitions.delete(:_prefix) + enum_suffix = definitions.delete(:_suffix) definitions.each do |name, values| # statuses = { } enum_values = ActiveSupport::HashWithIndifferentAccess.new @@ -138,19 +163,31 @@ module ActiveRecord _enum_methods_module.module_eval do pairs = values.respond_to?(:each_pair) ? values.each_pair : values.each_with_index pairs.each do |value, i| + if enum_prefix == true + prefix = "#{name}_" + elsif enum_prefix + prefix = "#{enum_prefix}_" + end + if enum_suffix == true + suffix = "_#{name}" + elsif enum_suffix + suffix = "_#{enum_suffix}" + end + + value_method_name = "#{prefix}#{value}#{suffix}" enum_values[value] = i # def active?() status == 0 end - klass.send(:detect_enum_conflict!, name, "#{value}?") - define_method("#{value}?") { self[name] == value.to_s } + klass.send(:detect_enum_conflict!, name, "#{value_method_name}?") + define_method("#{value_method_name}?") { self[name] == value.to_s } # def active!() update! status: :active end - klass.send(:detect_enum_conflict!, name, "#{value}!") - define_method("#{value}!") { update! name => value } + klass.send(:detect_enum_conflict!, name, "#{value_method_name}!") + define_method("#{value_method_name}!") { update! name => value } # scope :active, -> { where status: 0 } - klass.send(:detect_enum_conflict!, name, value, true) - klass.scope value, -> { klass.where name => value } + klass.send(:detect_enum_conflict!, name, value_method_name, true) + klass.scope value_method_name, -> { where(name => value) } end end defined_enums[name.to_s] = enum_values @@ -173,30 +210,22 @@ module ActiveRecord def detect_enum_conflict!(enum_name, method_name, klass_method = false) if klass_method && dangerous_class_method?(method_name) - raise ArgumentError, ENUM_CONFLICT_MESSAGE % { - enum: enum_name, - klass: self.name, - type: 'class', - method: method_name, - source: 'Active Record' - } + raise_conflict_error(enum_name, method_name, type: 'class') elsif !klass_method && dangerous_attribute_method?(method_name) - raise ArgumentError, ENUM_CONFLICT_MESSAGE % { - enum: enum_name, - klass: self.name, - type: 'instance', - method: method_name, - source: 'Active Record' - } + raise_conflict_error(enum_name, method_name) elsif !klass_method && method_defined_within?(method_name, _enum_methods_module, Module) - raise ArgumentError, ENUM_CONFLICT_MESSAGE % { - enum: enum_name, - klass: self.name, - type: 'instance', - method: method_name, - source: 'another enum' - } + raise_conflict_error(enum_name, method_name, source: 'another enum') end end + + def raise_conflict_error(enum_name, method_name, type: 'instance', source: 'Active Record') + raise ArgumentError, ENUM_CONFLICT_MESSAGE % { + enum: enum_name, + klass: self.name, + type: type, + method: method_name, + source: source + } + end end end diff --git a/activerecord/lib/active_record/errors.rb b/activerecord/lib/active_record/errors.rb index 0f1759abaa..e5906b6756 100644 --- a/activerecord/lib/active_record/errors.rb +++ b/activerecord/lib/active_record/errors.rb @@ -7,8 +7,10 @@ module ActiveRecord end # Raised when the single-table inheritance mechanism fails to locate the subclass - # (for example due to improper usage of column that +inheritance_column+ points to). - class SubclassNotFound < ActiveRecordError #:nodoc: + # (for example due to improper usage of column that + # {ActiveRecord::Base.inheritance_column}[rdoc-ref:ModelSchema::ClassMethods#inheritance_column] + # points to). + class SubclassNotFound < ActiveRecordError end # Raised when an object assigned to an association has an incorrect type. @@ -40,27 +42,40 @@ module ActiveRecord class AdapterNotFound < ActiveRecordError end - # Raised when connection to the database could not been established (for - # example when +connection=+ is given a nil object). + # Raised when connection to the database could not been established (for example when + # {ActiveRecord::Base.connection=}[rdoc-ref:ConnectionHandling#connection] + # is given a nil object). class ConnectionNotEstablished < ActiveRecordError end - # Raised when Active Record cannot find record by given id or set of ids. + # Raised when Active Record cannot find a record by given id or set of ids. class RecordNotFound < ActiveRecordError + attr_reader :model, :primary_key, :id + + def initialize(message = nil, model = nil, primary_key = nil, id = nil) + @primary_key = primary_key + @model = model + @id = id + + super(message) + end end - # Raised by ActiveRecord::Base.save! and ActiveRecord::Base.create! methods when record cannot be - # saved because record is invalid. + # Raised by {ActiveRecord::Base#save!}[rdoc-ref:Persistence#save!] and + # {ActiveRecord::Base.create!}[rdoc-ref:Persistence::ClassMethods#create!] + # methods when a record is invalid and can not be saved. class RecordNotSaved < ActiveRecordError attr_reader :record - def initialize(message, record = nil) + def initialize(message = nil, record = nil) @record = record super(message) end end - # Raised by ActiveRecord::Base.destroy! when a call to destroy would return false. + # Raised by {ActiveRecord::Base#destroy!}[rdoc-ref:Persistence#destroy!] + # when a call to {#destroy}[rdoc-ref:Persistence#destroy!] + # would return false. # # begin # complex_operation_that_internally_calls_destroy! @@ -71,7 +86,7 @@ module ActiveRecord class RecordNotDestroyed < ActiveRecordError attr_reader :record - def initialize(message, record = nil) + def initialize(message = nil, record = nil) @record = record super(message) end @@ -79,18 +94,26 @@ module ActiveRecord # Superclass for all database execution errors. # - # Wraps the underlying database error as +original_exception+. + # Wraps the underlying database error as +cause+. class StatementInvalid < ActiveRecordError - attr_reader :original_exception - def initialize(message, original_exception = nil) - super(message) - @original_exception = original_exception + def initialize(message = nil, original_exception = nil) + if original_exception + ActiveSupport::Deprecation.warn("Passing #original_exception is deprecated and has no effect. " \ + "Exceptions will automatically capture the original exception.", caller) + end + + super(message || $!.try(:message)) + end + + def original_exception + ActiveSupport::Deprecation.warn("#original_exception is deprecated. Use #cause instead.", caller) + cause end end # Defunct wrapper class kept for compatibility. - # +StatementInvalid+ wraps the original exception now. + # StatementInvalid wraps the original exception now. class WrappedDatabaseException < StatementInvalid end @@ -103,8 +126,8 @@ module ActiveRecord end # Raised when number of bind variables in statement given to +:condition+ key - # (for example, when using +find+ method) does not match number of expected - # values supplied. + # (for example, when using {ActiveRecord::Base.find}[rdoc-ref:FinderMethods#find] method) + # does not match number of expected values supplied. # # For example, when there are two placeholders with only one value supplied: # @@ -125,16 +148,22 @@ module ActiveRecord class StaleObjectError < ActiveRecordError attr_reader :record, :attempted_action - def initialize(record, attempted_action) - super("Attempted to #{attempted_action} a stale object: #{record.class.name}") - @record = record - @attempted_action = attempted_action + def initialize(record = nil, attempted_action = nil) + if record && attempted_action + @record = record + @attempted_action = attempted_action + super("Attempted to #{attempted_action} a stale object: #{record.class.name}.") + else + super("Stale object error.") + end end end # Raised when association is being configured improperly or user tries to use - # offset and limit together with +has_many+ or +has_and_belongs_to_many+ + # offset and limit together with + # {ActiveRecord::Base.has_many}[rdoc-ref:Associations::ClassMethods#has_many] or + # {ActiveRecord::Base.has_and_belongs_to_many}[rdoc-ref:Associations::ClassMethods#has_and_belongs_to_many] # associations. class ConfigurationError < ActiveRecordError end @@ -143,9 +172,10 @@ module ActiveRecord class ReadOnlyRecord < ActiveRecordError end - # ActiveRecord::Transactions::ClassMethods.transaction uses this exception - # to distinguish a deliberate rollback from other exceptional situations. - # Normally, raising an exception will cause the +transaction+ method to rollback + # {ActiveRecord::Base.transaction}[rdoc-ref:Transactions::ClassMethods#transaction] + # uses this exception to distinguish a deliberate rollback from other exceptional situations. + # Normally, raising an exception will cause the + # {.transaction}[rdoc-ref:Transactions::ClassMethods#transaction] method to rollback # the database transaction *and* pass on the exception. But if you raise an # ActiveRecord::Rollback exception, then the database transaction will be rolled back, # without passing on the exception. @@ -182,25 +212,26 @@ module ActiveRecord UnknownAttributeError = ActiveModel::UnknownAttributeError # Raised when an error occurred while doing a mass assignment to an attribute through the - # +attributes=+ method. The exception has an +attribute+ property that is the name of the - # offending attribute. + # {ActiveRecord::Base#attributes=}[rdoc-ref:AttributeAssignment#attributes=] method. + # The exception has an +attribute+ property that is the name of the offending attribute. class AttributeAssignmentError < ActiveRecordError attr_reader :exception, :attribute - def initialize(message, exception, attribute) + def initialize(message = nil, exception = nil, attribute = nil) super(message) @exception = exception @attribute = attribute end end - # Raised when there are multiple errors while doing a mass assignment through the +attributes+ + # Raised when there are multiple errors while doing a mass assignment through the + # {ActiveRecord::Base#attributes=}[rdoc-ref:AttributeAssignment#attributes=] # method. The exception has an +errors+ property that contains an array of AttributeAssignmentError # objects, each corresponding to the error while assigning to an attribute. class MultiparameterAssignmentErrors < ActiveRecordError attr_reader :errors - def initialize(errors) + def initialize(errors = nil) @errors = errors end end @@ -209,11 +240,16 @@ module ActiveRecord class UnknownPrimaryKey < ActiveRecordError attr_reader :model - def initialize(model) - super("Unknown primary key for table #{model.table_name} in model #{model}.") - @model = model + def initialize(model = nil, description = nil) + if model + message = "Unknown primary key for table #{model.table_name} in model #{model}." + message += "\n#{description}" if description + @model = model + super(message) + else + super("Unknown primary key.") + end end - end # Raised when a relation cannot be mutated because it's already loaded. @@ -236,7 +272,7 @@ module ActiveRecord # * You are joining an existing open transaction # * You are creating a nested (savepoint) transaction # - # The mysql, mysql2 and postgresql adapters support setting the transaction isolation level. + # The mysql2 and postgresql adapters support setting the transaction isolation level. class TransactionIsolationError < ActiveRecordError end end diff --git a/activerecord/lib/active_record/explain_registry.rb b/activerecord/lib/active_record/explain_registry.rb index f5cd57e075..b652932f9c 100644 --- a/activerecord/lib/active_record/explain_registry.rb +++ b/activerecord/lib/active_record/explain_registry.rb @@ -7,7 +7,7 @@ module ActiveRecord # # returns the collected queries local to the current thread. # - # See the documentation of <tt>ActiveSupport::PerThreadRegistry</tt> + # See the documentation of ActiveSupport::PerThreadRegistry # for further details. class ExplainRegistry # :nodoc: extend ActiveSupport::PerThreadRegistry diff --git a/activerecord/lib/active_record/explain_subscriber.rb b/activerecord/lib/active_record/explain_subscriber.rb index 6a49936644..90bcf5a205 100644 --- a/activerecord/lib/active_record/explain_subscriber.rb +++ b/activerecord/lib/active_record/explain_subscriber.rb @@ -14,12 +14,12 @@ module ActiveRecord end # SCHEMA queries cannot be EXPLAINed, also we do not want to run EXPLAIN on - # our own EXPLAINs now matter how loopingly beautiful that would be. + # our own EXPLAINs no matter how loopingly beautiful that would be. # # On the other hand, we want to monitor the performance of our real database # queries, not the performance of the access to the query cache. IGNORED_PAYLOADS = %w(SCHEMA EXPLAIN CACHE) - EXPLAINED_SQLS = /\A\s*(select|update|delete|insert)\b/i + EXPLAINED_SQLS = /\A\s*(with|select|update|delete|insert)\b/i def ignore_payload?(payload) payload[:exception] || IGNORED_PAYLOADS.include?(payload[:name]) || payload[:sql] !~ EXPLAINED_SQLS end diff --git a/activerecord/lib/active_record/fixture_set/file.rb b/activerecord/lib/active_record/fixture_set/file.rb index 8132310c91..f969556c50 100644 --- a/activerecord/lib/active_record/fixture_set/file.rb +++ b/activerecord/lib/active_record/fixture_set/file.rb @@ -17,24 +17,39 @@ module ActiveRecord def initialize(file) @file = file - @rows = nil end def each(&block) rows.each(&block) end + def model_class + config_row['model_class'] + end private def rows - return @rows if @rows + @rows ||= raw_rows.reject { |fixture_name, _| fixture_name == '_fixture' } + end + + def config_row + @config_row ||= begin + row = raw_rows.find { |fixture_name, _| fixture_name == '_fixture' } + if row + row.last + else + {'model_class': nil} + end + end + end - begin + def raw_rows + @raw_rows ||= begin data = YAML.load(render(IO.read(@file))) + data ? validate(data).to_a : [] rescue ArgumentError, Psych::SyntaxError => error raise Fixture::FormatError, "a YAML error occurred parsing #{@file}. Please note that YAML must be consistently indented using spaces. Tabs are not allowed. Please have a look at http://www.yaml.org/faq.html\nThe exact error was:\n #{error.class}: #{error}", error.backtrace end - @rows = data ? validate(data).to_a : [] end def render(content) diff --git a/activerecord/lib/active_record/fixtures.rb b/activerecord/lib/active_record/fixtures.rb index 2c1771dd6c..ed1bbf5dcd 100644 --- a/activerecord/lib/active_record/fixtures.rb +++ b/activerecord/lib/active_record/fixtures.rb @@ -89,7 +89,7 @@ module ActiveRecord # end # # In order to use these methods to access fixtured data within your testcases, you must specify one of the - # following in your <tt>ActiveSupport::TestCase</tt>-derived class: + # following in your ActiveSupport::TestCase-derived class: # # - to fully enable instantiated fixtures (enable alternate methods #1 and #2 above) # self.use_instantiated_fixtures = true @@ -110,7 +110,7 @@ module ActiveRecord # <% 1.upto(1000) do |i| %> # fix_<%= i %>: # id: <%= i %> - # name: guy_<%= 1 %> + # name: guy_<%= i %> # <% end %> # # This will create 1000 very simple fixtures. @@ -124,7 +124,7 @@ module ActiveRecord # # Helper methods defined in a fixture will not be available in other fixtures, to prevent against # unwanted inter-test dependencies. Methods used by multiple fixtures should be defined in a module - # that is included in <tt>ActiveRecord::FixtureSet.context_class</tt>. + # that is included in ActiveRecord::FixtureSet.context_class. # # - define a helper method in `test_helper.rb` # module FixtureFileHelpers @@ -395,6 +395,20 @@ module ActiveRecord # <<: *DEFAULTS # # Any fixture labeled "DEFAULTS" is safely ignored. + # + # == Configure the fixture model class + # + # It's possible to set the fixture's model class directly in the YAML file. + # This is helpful when fixtures are loaded outside tests and + # +set_fixture_class+ is not available (e.g. + # when running <tt>rails db:fixtures:load</tt>). + # + # _fixture: + # model_class: User + # david: + # name: David + # + # Any fixtures labeled "_fixture" are safely ignored. class FixtureSet #-- # An instance of FixtureSet is normally stored in a single YAML file and @@ -578,21 +592,16 @@ module ActiveRecord @name = name @path = path @config = config - @model_class = nil - if class_name.is_a?(Class) # TODO: Should be an AR::Base type class, or any? - @model_class = class_name - else - @model_class = class_name.safe_constantize if class_name - end + self.model_class = class_name + + @fixtures = read_fixture_files(path) @connection = connection @table_name = ( model_class.respond_to?(:table_name) ? model_class.table_name : self.class.default_fixture_table_name(name, config) ) - - @fixtures = read_fixture_files path, @model_class end def [](x) @@ -615,7 +624,6 @@ module ActiveRecord # a list of rows to insert to that table. def table_rows now = config.default_timezone == :utc ? Time.now.utc : Time.now - now = now.to_s(:db) # allow a standard key to be used for doing defaults in YAML fixtures.delete('DEFAULTS') @@ -644,6 +652,13 @@ module ActiveRecord row[primary_key_name] = ActiveRecord::FixtureSet.identify(label, primary_key_type) end + # Resolve enums + model_class.defined_enums.each do |name, values| + if row.include?(name) + row[name] = values.fetch(row[name], row[name]) + end + end + # If STI is used, find the correct subclass for association reflection reflection_class = if row.include?(inheritance_column_name) @@ -664,7 +679,7 @@ module ActiveRecord row[association.foreign_type] = $1 end - fk_type = association.active_record.type_for_attribute(fk_name).type + fk_type = reflection_class.type_for_attribute(fk_name).type row[fk_name] = ActiveRecord::FixtureSet.identify(value, fk_type) end when :has_many @@ -755,13 +770,25 @@ module ActiveRecord @column_names ||= @connection.columns(@table_name).collect(&:name) end - def read_fixture_files(path, model_class) + def model_class=(class_name) + if class_name.is_a?(Class) # TODO: Should be an AR::Base type class, or any? + @model_class = class_name + else + @model_class = class_name.safe_constantize if class_name + end + end + + # Loads the fixtures from the YAML file at +path+. + # If the file sets the +model_class+ and current instance value is not set, + # it uses the file value. + def read_fixture_files(path) yaml_files = Dir["#{path}/{**,*}/*.yml"].select { |f| ::File.file?(f) } + [yaml_file_path(path)] yaml_files.each_with_object({}) do |file, fixtures| FixtureSet::File.open(file) do |fh| + self.model_class ||= fh.model_class if fh.model_class fh.each do |fixture_name, row| fixtures[fixture_name] = ActiveRecord::Fixture.new(row, model_class) end @@ -821,12 +848,12 @@ module ActiveRecord module TestFixtures extend ActiveSupport::Concern - def before_setup + def before_setup # :nodoc: setup_fixtures super end - def after_teardown + def after_teardown # :nodoc: super teardown_fixtures end @@ -848,9 +875,7 @@ module ActiveRecord self.pre_loaded_fixtures = false self.config = ActiveRecord::Base - self.fixture_class_names = Hash.new do |h, fixture_set_name| - h[fixture_set_name] = ActiveRecord::FixtureSet.default_fixture_model_name(fixture_set_name, self.config) - end + self.fixture_class_names = {} silence_warnings do define_singleton_method :use_transactional_tests do diff --git a/activerecord/lib/active_record/gem_version.rb b/activerecord/lib/active_record/gem_version.rb index a388b529c9..ecf4046bff 100644 --- a/activerecord/lib/active_record/gem_version.rb +++ b/activerecord/lib/active_record/gem_version.rb @@ -8,7 +8,7 @@ module ActiveRecord MAJOR = 5 MINOR = 0 TINY = 0 - PRE = "alpha" + PRE = "beta1" STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".") end diff --git a/activerecord/lib/active_record/inheritance.rb b/activerecord/lib/active_record/inheritance.rb index e613d157aa..6259c4cd33 100644 --- a/activerecord/lib/active_record/inheritance.rb +++ b/activerecord/lib/active_record/inheritance.rb @@ -51,11 +51,11 @@ module ActiveRecord end attrs = args.first - if subclass_from_attributes?(attrs) - subclass = subclass_from_attributes(attrs) + if has_attribute?(inheritance_column) + subclass = subclass_from_attributes(attrs) || subclass_from_attributes(column_defaults) end - if subclass + if subclass && subclass != self subclass.new(*args, &block) else super @@ -82,7 +82,7 @@ module ActiveRecord # Returns the class descending directly from ActiveRecord::Base, or # an abstract class, if any, in the inheritance hierarchy. # - # If A extends AR::Base, A.base_class will return A. If B descends from A + # If A extends ActiveRecord::Base, A.base_class will return A. If B descends from A # through some arbitrarily deep hierarchy, B.base_class will return A. # # If B < A and C < B and if A is an abstract_class then both B.base_class @@ -163,21 +163,27 @@ module ActiveRecord end def using_single_table_inheritance?(record) - record[inheritance_column].present? && columns_hash.include?(inheritance_column) + record[inheritance_column].present? && has_attribute?(inheritance_column) end def find_sti_class(type_name) - if store_full_sti_class - ActiveSupport::Dependencies.constantize(type_name) - else - compute_type(type_name) + subclass = begin + if store_full_sti_class + ActiveSupport::Dependencies.constantize(type_name) + else + compute_type(type_name) + end + rescue NameError + raise SubclassNotFound, + "The single-table inheritance mechanism failed to locate the subclass: '#{type_name}'. " \ + "This error is raised because the column '#{inheritance_column}' is reserved for storing the class in case of inheritance. " \ + "Please rename this column if you didn't intend it to be used for storing the inheritance class " \ + "or overwrite #{name}.inheritance_column to use another column for that information." + end + unless subclass == self || descendants.include?(subclass) + raise SubclassNotFound, "Invalid single-table inheritance type: #{subclass.name} is not a subclass of #{name}" end - rescue NameError - raise SubclassNotFound, - "The single-table inheritance mechanism failed to locate the subclass: '#{type_name}'. " + - "This error is raised because the column '#{inheritance_column}' is reserved for storing the class in case of inheritance. " + - "Please rename this column if you didn't intend it to be used for storing the inheritance class " + - "or overwrite #{name}.inheritance_column to use another column for that information." + subclass end def type_condition(table = arel_table) @@ -189,24 +195,13 @@ module ActiveRecord # Detect the subclass from the inheritance column of attrs. If the inheritance column value # is not self or a valid subclass, raises ActiveRecord::SubclassNotFound - # If this is a StrongParameters hash, and access to inheritance_column is not permitted, - # this will ignore the inheritance column and return nil - def subclass_from_attributes?(attrs) - attribute_names.include?(inheritance_column) && attrs.is_a?(Hash) - end - def subclass_from_attributes(attrs) - subclass_name = attrs.with_indifferent_access[inheritance_column] - - if subclass_name.present? - subclass = find_sti_class(subclass_name) - - if subclass.name != self.name - unless descendants.include?(subclass) - raise ActiveRecord::SubclassNotFound.new("Invalid single-table inheritance type: #{subclass.name} is not a subclass of #{name}") - end + attrs = attrs.to_h if attrs.respond_to?(:permitted?) + if attrs.is_a?(Hash) + subclass_name = attrs.with_indifferent_access[inheritance_column] - subclass + if subclass_name.present? + find_sti_class(subclass_name) end end end diff --git a/activerecord/lib/active_record/integration.rb b/activerecord/lib/active_record/integration.rb index 15b2f65dcb..466c8509a4 100644 --- a/activerecord/lib/active_record/integration.rb +++ b/activerecord/lib/active_record/integration.rb @@ -10,12 +10,12 @@ module ActiveRecord # Indicates the format used to generate the timestamp in the cache key. # Accepts any of the symbols in <tt>Time::DATE_FORMATS</tt>. # - # This is +:nsec+, by default. + # This is +:usec+, by default. class_attribute :cache_timestamp_format, :instance_writer => false - self.cache_timestamp_format = :nsec + self.cache_timestamp_format = :usec end - # Returns a String, which Action Pack uses for constructing an URL to this + # Returns a String, which Action Pack uses for constructing a URL to this # object. The default implementation returns this record's id as a String, # or nil if this record's unsaved. # @@ -84,7 +84,7 @@ module ActiveRecord # Values longer than 20 characters will be truncated. The value # is truncated word by word. # - # user = User.find_by(name: 'David HeinemeierHansson') + # user = User.find_by(name: 'David Heinemeier Hansson') # user.id # => 125 # user_path(user) # => "/users/125-david" # diff --git a/activerecord/lib/active_record/internal_metadata.rb b/activerecord/lib/active_record/internal_metadata.rb new file mode 100644 index 0000000000..e5c6e5c885 --- /dev/null +++ b/activerecord/lib/active_record/internal_metadata.rb @@ -0,0 +1,46 @@ +require 'active_record/scoping/default' +require 'active_record/scoping/named' + +module ActiveRecord + # This class is used to create a table that keeps track of values and keys such + # as which environment migrations were run in. + class InternalMetadata < ActiveRecord::Base # :nodoc: + class << self + def primary_key + "key" + end + + def table_name + "#{table_name_prefix}#{ActiveRecord::Base.internal_metadata_table_name}#{table_name_suffix}" + end + + def index_name + "#{table_name_prefix}unique_#{ActiveRecord::Base.internal_metadata_table_name}#{table_name_suffix}" + end + + def []=(key, value) + first_or_initialize(key: key).update_attributes!(value: value) + end + + def [](key) + where(key: key).pluck(:value).first + end + + def table_exists? + ActiveSupport::Deprecation.silence { connection.table_exists?(table_name) } + end + + # Creates an internal metadata table with columns +key+ and +value+ + def create_table + unless table_exists? + connection.create_table(table_name, id: false) do |t| + t.column :key, :string + t.column :value, :string + t.timestamps + t.index :key, unique: true, name: index_name + end + end + end + end + end +end diff --git a/activerecord/lib/active_record/locale/en.yml b/activerecord/lib/active_record/locale/en.yml index 8a3c27e6da..0b35027b2b 100644 --- a/activerecord/lib/active_record/locale/en.yml +++ b/activerecord/lib/active_record/locale/en.yml @@ -16,8 +16,8 @@ en: messages: record_invalid: "Validation failed: %{errors}" restrict_dependent_destroy: - one: "Cannot delete record because a dependent %{record} exists" - many: "Cannot delete record because dependent %{record} exist" + has_one: "Cannot delete record because a dependent %{record} exists" + has_many: "Cannot delete record because dependent %{record} exist" # Append your own errors here or at the model/attributes scope. # You can define own errors for models or model attributes. diff --git a/activerecord/lib/active_record/locking/optimistic.rb b/activerecord/lib/active_record/locking/optimistic.rb index a09437b4b0..2336d23a1c 100644 --- a/activerecord/lib/active_record/locking/optimistic.rb +++ b/activerecord/lib/active_record/locking/optimistic.rb @@ -22,7 +22,7 @@ module ActiveRecord # p1.save # # p2.first_name = "should fail" - # p2.save # Raises a ActiveRecord::StaleObjectError + # p2.save # Raises an ActiveRecord::StaleObjectError # # Optimistic locking will also check for stale data when objects are destroyed. Example: # @@ -32,7 +32,7 @@ module ActiveRecord # p1.first_name = "Michael" # p1.save # - # p2.destroy # Raises a ActiveRecord::StaleObjectError + # p2.destroy # Raises an ActiveRecord::StaleObjectError # # You're then responsible for dealing with the conflict by rescuing the exception and either rolling back, merging, # or otherwise apply the business logic needed to resolve the conflict. diff --git a/activerecord/lib/active_record/locking/pessimistic.rb b/activerecord/lib/active_record/locking/pessimistic.rb index 3d95c54ef3..8ecdf76b72 100644 --- a/activerecord/lib/active_record/locking/pessimistic.rb +++ b/activerecord/lib/active_record/locking/pessimistic.rb @@ -51,7 +51,7 @@ module ActiveRecord # end # # Database-specific information on row locking: - # MySQL: http://dev.mysql.com/doc/refman/5.6/en/innodb-locking-reads.html + # MySQL: http://dev.mysql.com/doc/refman/5.7/en/innodb-locking-reads.html # PostgreSQL: http://www.postgresql.org/docs/current/interactive/sql-select.html#SQL-FOR-UPDATE-SHARE module Pessimistic # Obtain a row lock on this record. Reloads the record to obtain the requested diff --git a/activerecord/lib/active_record/log_subscriber.rb b/activerecord/lib/active_record/log_subscriber.rb index af816a278e..b63caa4473 100644 --- a/activerecord/lib/active_record/log_subscriber.rb +++ b/activerecord/lib/active_record/log_subscriber.rb @@ -47,18 +47,41 @@ module ActiveRecord binds = " " + payload[:binds].map { |attr| render_bind(attr) }.inspect end - if odd? - name = color(name, CYAN, true) - sql = color(sql, nil, true) - else - name = color(name, MAGENTA, true) - end + name = colorize_payload_name(name, payload[:name]) + sql = color(sql, sql_color(sql), true) debug " #{name} #{sql}#{binds}" end - def odd? - @odd = !@odd + private + + def colorize_payload_name(name, payload_name) + if payload_name.blank? || payload_name == "SQL" # SQL vs Model Load/Exists + color(name, MAGENTA, true) + else + color(name, CYAN, true) + end + end + + def sql_color(sql) + case sql + when /\A\s*rollback/mi + RED + when /\s*.*?select .*for update/mi, /\A\s*lock/mi + WHITE + when /\A\s*select/i + BLUE + when /\A\s*insert/i + GREEN + when /\A\s*update/i + YELLOW + when /\A\s*delete/i + RED + when /transaction\s*\Z/i + CYAN + else + MAGENTA + end end def logger diff --git a/activerecord/lib/active_record/migration.rb b/activerecord/lib/active_record/migration.rb index 192a456846..f5b29c7f2e 100644 --- a/activerecord/lib/active_record/migration.rb +++ b/activerecord/lib/active_record/migration.rb @@ -9,40 +9,170 @@ module ActiveRecord end end - # Exception that can be raised to stop migrations from going backwards. + # Exception that can be raised to stop migrations from being rolled back. + # For example the following migration is not reversible. + # Rolling back this migration will raise an ActiveRecord::IrreversibleMigration error. + # + # class IrreversibleMigrationExample < ActiveRecord::Migration[5.0] + # def change + # create_table :distributors do |t| + # t.string :zipcode + # end + # + # execute <<-SQL + # ALTER TABLE distributors + # ADD CONSTRAINT zipchk + # CHECK (char_length(zipcode) = 5) NO INHERIT; + # SQL + # end + # end + # + # There are two ways to mitigate this problem. + # + # 1. Define <tt>#up</tt> and <tt>#down</tt> methods instead of <tt>#change</tt>: + # + # class ReversibleMigrationExample < ActiveRecord::Migration[5.0] + # def up + # create_table :distributors do |t| + # t.string :zipcode + # end + # + # execute <<-SQL + # ALTER TABLE distributors + # ADD CONSTRAINT zipchk + # CHECK (char_length(zipcode) = 5) NO INHERIT; + # SQL + # end + # + # def down + # execute <<-SQL + # ALTER TABLE distributors + # DROP CONSTRAINT zipchk + # SQL + # + # drop_table :distributors + # end + # end + # + # 2. Use the #reversible method in <tt>#change</tt> method: + # + # class ReversibleMigrationExample < ActiveRecord::Migration[5.0] + # def change + # create_table :distributors do |t| + # t.string :zipcode + # end + # + # reversible do |dir| + # dir.up do + # execute <<-SQL + # ALTER TABLE distributors + # ADD CONSTRAINT zipchk + # CHECK (char_length(zipcode) = 5) NO INHERIT; + # SQL + # end + # + # dir.down do + # execute <<-SQL + # ALTER TABLE distributors + # DROP CONSTRAINT zipchk + # SQL + # end + # end + # end + # end class IrreversibleMigration < MigrationError end class DuplicateMigrationVersionError < MigrationError#:nodoc: - def initialize(version) - super("Multiple migrations have the version number #{version}") + def initialize(version = nil) + if version + super("Multiple migrations have the version number #{version}.") + else + super("Duplicate migration version error.") + end end end class DuplicateMigrationNameError < MigrationError#:nodoc: - def initialize(name) - super("Multiple migrations have the name #{name}") + def initialize(name = nil) + if name + super("Multiple migrations have the name #{name}.") + else + super("Duplicate migration name.") + end end end class UnknownMigrationVersionError < MigrationError #:nodoc: - def initialize(version) - super("No migration with version number #{version}") + def initialize(version = nil) + if version + super("No migration with version number #{version}.") + else + super("Unknown migration version.") + end end end class IllegalMigrationNameError < MigrationError#:nodoc: - def initialize(name) - super("Illegal name for migration file: #{name}\n\t(only lower case letters, numbers, and '_' allowed)") + def initialize(name = nil) + if name + super("Illegal name for migration file: #{name}\n\t(only lower case letters, numbers, and '_' allowed).") + else + super("Illegal name for migration.") + end end end class PendingMigrationError < MigrationError#:nodoc: + def initialize(message = nil) + if !message && defined?(Rails.env) + super("Migrations are pending. To resolve this issue, run:\n\n\tbin/rails db:migrate RAILS_ENV=#{::Rails.env}") + elsif !message + super("Migrations are pending. To resolve this issue, run:\n\n\tbin/rails db:migrate") + else + super + end + end + end + + class ConcurrentMigrationError < MigrationError #:nodoc: + DEFAULT_MESSAGE = "Cannot run migrations because another migration process is currently running.".freeze + + def initialize(message = DEFAULT_MESSAGE) + super + end + end + + class NoEnvironmentInSchemaError < MigrationError #:nodoc: def initialize + msg = "Environment data not found in the schema. To resolve this issue, run: \n\n\tbin/rake db:environment:set" if defined?(Rails.env) - super("Migrations are pending. To resolve this issue, run:\n\n\tbin/rake db:migrate RAILS_ENV=#{::Rails.env}") + super("#{msg} RAILS_ENV=#{::Rails.env}") else - super("Migrations are pending. To resolve this issue, run:\n\n\tbin/rake db:migrate") + super(msg) + end + end + end + + class ProtectedEnvironmentError < ActiveRecordError #:nodoc: + def initialize(env = "production") + msg = "You are attempting to run a destructive action against your '#{env}' database\n" + msg << "If you are sure you want to continue, run the same command with the environment variable\n" + msg << "DISABLE_DATABASE_ENVIRONMENT_CHECK=1" + super(msg) + end + end + + class EnvironmentMismatchError < ActiveRecordError + def initialize(current: nil, stored: nil) + msg = "You are attempting to modify a database that was last run in `#{ stored }` environment.\n" + msg << "You are running in `#{ current }` environment." + msg << "If you are sure you want to continue, first set the environment using:\n\n" + msg << "\tbin/rake db:environment:set" + if defined?(Rails.env) + super("#{msg} RAILS_ENV=#{::Rails.env}") + else + super(msg) end end end @@ -59,7 +189,7 @@ module ActiveRecord # # Example of a simple migration: # - # class AddSsl < ActiveRecord::Migration + # class AddSsl < ActiveRecord::Migration[5.0] # def up # add_column :accounts, :ssl_enabled, :boolean, default: true # end @@ -79,7 +209,7 @@ module ActiveRecord # # Example of a more complex migration that also needs to initialize data: # - # class AddSystemSettings < ActiveRecord::Migration + # class AddSystemSettings < ActiveRecord::Migration[5.0] # def up # create_table :system_settings do |t| # t.string :name @@ -106,17 +236,18 @@ module ActiveRecord # # == Available transformations # + # === Creation + # + # * <tt>create_join_table(table_1, table_2, options)</tt>: Creates a join + # table having its name as the lexical order of the first two + # arguments. See + # ActiveRecord::ConnectionAdapters::SchemaStatements#create_join_table for + # details. # * <tt>create_table(name, options)</tt>: Creates a table called +name+ and # makes the table object available to a block that can then add columns to it, # following the same format as +add_column+. See example above. The options hash # is for fragments like "DEFAULT CHARSET=UTF-8" that are appended to the create # table definition. - # * <tt>drop_table(name)</tt>: Drops the table called +name+. - # * <tt>change_table(name, options)</tt>: Allows to make column alterations to - # the table called +name+. It makes the table object available to a block that - # can then add/remove columns, indexes or foreign keys to it. - # * <tt>rename_table(old_name, new_name)</tt>: Renames the table called +old_name+ - # to +new_name+. # * <tt>add_column(table_name, column_name, type, options)</tt>: Adds a new column # to the table called +table_name+ # named +column_name+ specified to be one of the following types: @@ -127,21 +258,59 @@ module ActiveRecord # Other options include <tt>:limit</tt> and <tt>:null</tt> (e.g. # <tt>{ limit: 50, null: false }</tt>) -- see # ActiveRecord::ConnectionAdapters::TableDefinition#column for details. - # * <tt>rename_column(table_name, column_name, new_column_name)</tt>: Renames - # a column but keeps the type and content. - # * <tt>change_column(table_name, column_name, type, options)</tt>: Changes - # the column to a different type using the same parameters as add_column. - # * <tt>remove_column(table_name, column_name, type, options)</tt>: Removes the column - # named +column_name+ from the table called +table_name+. + # * <tt>add_foreign_key(from_table, to_table, options)</tt>: Adds a new + # foreign key. +from_table+ is the table with the key column, +to_table+ contains + # the referenced primary key. # * <tt>add_index(table_name, column_names, options)</tt>: Adds a new index # with the name of the column. Other options include # <tt>:name</tt>, <tt>:unique</tt> (e.g. # <tt>{ name: 'users_name_index', unique: true }</tt>) and <tt>:order</tt> # (e.g. <tt>{ order: { name: :desc } }</tt>). - # * <tt>remove_index(table_name, column: column_name)</tt>: Removes the index - # specified by +column_name+. + # * <tt>add_reference(:table_name, :reference_name)</tt>: Adds a new column + # +reference_name_id+ by default an integer. See + # ActiveRecord::ConnectionAdapters::SchemaStatements#add_reference for details. + # * <tt>add_timestamps(table_name, options)</tt>: Adds timestamps (+created_at+ + # and +updated_at+) columns to +table_name+. + # + # === Modification + # + # * <tt>change_column(table_name, column_name, type, options)</tt>: Changes + # the column to a different type using the same parameters as add_column. + # * <tt>change_column_default(table_name, column_name, default)</tt>: Sets a + # default value for +column_name+ definded by +default+ on +table_name+. + # * <tt>change_column_null(table_name, column_name, null, default = nil)</tt>: + # Sets or removes a +NOT NULL+ constraint on +column_name+. The +null+ flag + # indicates whether the value can be +NULL+. See + # ActiveRecord::ConnectionAdapters::SchemaStatements#change_column_null for + # details. + # * <tt>change_table(name, options)</tt>: Allows to make column alterations to + # the table called +name+. It makes the table object available to a block that + # can then add/remove columns, indexes or foreign keys to it. + # * <tt>rename_column(table_name, column_name, new_column_name)</tt>: Renames + # a column but keeps the type and content. + # * <tt>rename_index(table_name, old_name, new_name)</tt>: Renames an index. + # * <tt>rename_table(old_name, new_name)</tt>: Renames the table called +old_name+ + # to +new_name+. + # + # === Deletion + # + # * <tt>drop_table(name)</tt>: Drops the table called +name+. + # * <tt>drop_join_table(table_1, table_2, options)</tt>: Drops the join table + # specified by the given arguments. + # * <tt>remove_column(table_name, column_name, type, options)</tt>: Removes the column + # named +column_name+ from the table called +table_name+. + # * <tt>remove_columns(table_name, *column_names)</tt>: Removes the given + # columns from the table definition. + # * <tt>remove_foreign_key(from_table, options_or_to_table)</tt>: Removes the + # given foreign key from the table called +table_name+. + # * <tt>remove_index(table_name, column: column_names)</tt>: Removes the index + # specified by +column_names+. # * <tt>remove_index(table_name, name: index_name)</tt>: Removes the index # specified by +index_name+. + # * <tt>remove_reference(table_name, ref_name, options)</tt>: Removes the + # reference(s) on +table_name+ specified by +ref_name+. + # * <tt>remove_timestamps(table_name, options)</tt>: Removes the timestamp + # columns (+created_at+ and +updated_at+) from the table definition. # # == Irreversible transformations # @@ -165,24 +334,24 @@ module ActiveRecord # # rails generate migration add_fieldname_to_tablename fieldname:string # - # This will generate the file <tt>timestamp_add_fieldname_to_tablename</tt>, which will look like this: - # class AddFieldnameToTablename < ActiveRecord::Migration + # This will generate the file <tt>timestamp_add_fieldname_to_tablename.rb</tt>, which will look like this: + # class AddFieldnameToTablename < ActiveRecord::Migration[5.0] # def change # add_column :tablenames, :fieldname, :string # end # end # # To run migrations against the currently configured database, use - # <tt>rake db:migrate</tt>. This will update the database by running all of the + # <tt>rails db:migrate</tt>. This will update the database by running all of the # pending migrations, creating the <tt>schema_migrations</tt> table # (see "About the schema_migrations table" section below) if missing. It will also # invoke the db:schema:dump task, which will update your db/schema.rb file # to match the structure of your database. # # To roll the database back to a previous migration version, use - # <tt>rake db:migrate VERSION=X</tt> where <tt>X</tt> is the version to which + # <tt>rails db:migrate VERSION=X</tt> where <tt>X</tt> is the version to which # you wish to downgrade. Alternatively, you can also use the STEP option if you - # wish to rollback last few migrations. <tt>rake db:migrate STEP=2</tt> will rollback + # wish to rollback last few migrations. <tt>rails db:migrate STEP=2</tt> will rollback # the latest two migrations. # # If any of the migrations throw an <tt>ActiveRecord::IrreversibleMigration</tt> exception, @@ -197,7 +366,7 @@ module ActiveRecord # # Not all migrations change the schema. Some just fix the data: # - # class RemoveEmptyTags < ActiveRecord::Migration + # class RemoveEmptyTags < ActiveRecord::Migration[5.0] # def up # Tag.all.each { |tag| tag.destroy if tag.pages.empty? } # end @@ -210,7 +379,7 @@ module ActiveRecord # # Others remove columns when they migrate up instead of down: # - # class RemoveUnnecessaryItemAttributes < ActiveRecord::Migration + # class RemoveUnnecessaryItemAttributes < ActiveRecord::Migration[5.0] # def up # remove_column :items, :incomplete_items_count # remove_column :items, :completed_items_count @@ -224,7 +393,7 @@ module ActiveRecord # # And sometimes you need to do something in SQL not abstracted directly by migrations: # - # class MakeJoinUnique < ActiveRecord::Migration + # class MakeJoinUnique < ActiveRecord::Migration[5.0] # def up # execute "ALTER TABLE `pages_linked_pages` ADD UNIQUE `page_id_linked_page_id` (`page_id`,`linked_page_id`)" # end @@ -241,7 +410,7 @@ module ActiveRecord # <tt>Base#reset_column_information</tt> in order to ensure that the model has the # latest column data from after the new column was added. Example: # - # class AddPeopleSalary < ActiveRecord::Migration + # class AddPeopleSalary < ActiveRecord::Migration[5.0] # def up # add_column :people, :salary, :integer # Person.reset_column_information @@ -299,7 +468,7 @@ module ActiveRecord # To define a reversible migration, define the +change+ method in your # migration like this: # - # class TenderloveMigration < ActiveRecord::Migration + # class TenderloveMigration < ActiveRecord::Migration[5.0] # def change # create_table(:horses) do |t| # t.column :content, :text @@ -329,7 +498,7 @@ module ActiveRecord # can't execute inside a transaction though, and for these situations # you can turn the automatic transactions off. # - # class ChangeEnum < ActiveRecord::Migration + # class ChangeEnum < ActiveRecord::Migration[5.0] # disable_ddl_transaction! # # def up @@ -341,7 +510,34 @@ module ActiveRecord # are in a Migration with <tt>self.disable_ddl_transaction!</tt>. class Migration autoload :CommandRecorder, 'active_record/migration/command_recorder' + autoload :Compatibility, 'active_record/migration/compatibility' + + # This must be defined before the inherited hook, below + class Current < Migration # :nodoc: + end + def self.inherited(subclass) # :nodoc: + super + if subclass.superclass == Migration + subclass.include Compatibility::Legacy + end + end + + def self.[](version) + version = version.to_s + name = "V#{version.tr('.', '_')}" + unless Compatibility.const_defined?(name) + versions = Compatibility.constants.grep(/\AV[0-9_]+\z/).map { |s| s.to_s.delete('V').tr('_', '.').inspect } + raise "Unknown migration version #{version.inspect}; expected one of #{versions.sort.join(', ')}" + end + Compatibility.const_get(name) + end + + def self.current_version + Rails.version.to_f + end + + MigrationFilenameRegexp = /\A([0-9]+)_([_a-z0-9]*)\.?([_a-z0-9]*)?\.rb\z/ # :nodoc: # This class is used to verify that all migrations have been run before # loading a web page if config.active_record.migration_error is set to :page_load @@ -373,6 +569,11 @@ module ActiveRecord attr_accessor :delegate # :nodoc: attr_accessor :disable_ddl_transaction # :nodoc: + def nearest_delegate # :nodoc: + delegate || superclass.nearest_delegate + end + + # Raises <tt>ActiveRecord::PendingMigrationError</tt> error if any migrations are pending. def check_pending!(connection = Base.connection) raise ActiveRecord::PendingMigrationError if ActiveRecord::Migrator.needs_migration?(connection) end @@ -383,7 +584,7 @@ module ActiveRecord FileUtils.cd Rails.root do current_config = Base.connection_config Base.clear_all_connections! - system("bin/rake db:test:prepare") + system("bin/rails db:test:prepare") # Establish a new connection, the old database may be gone (db:test:prepare uses purge) Base.establish_connection(current_config) end @@ -398,14 +599,17 @@ module ActiveRecord end def method_missing(name, *args, &block) # :nodoc: - (delegate || superclass.delegate).send(name, *args, &block) + nearest_delegate.send(name, *args, &block) end def migrate(direction) new.migrate direction end - # Disable DDL transactions for this migration. + # Disable the transaction wrapping this migration. + # You can still create your own transactions even after calling #disable_ddl_transaction! + # + # For more details read the {"Transactional Migrations" section above}[rdoc-ref:Migration]. def disable_ddl_transaction! @disable_ddl_transaction = true end @@ -435,7 +639,7 @@ module ActiveRecord # and create the table 'apples' on the way up, and the reverse # on the way down. # - # class FixTLMigration < ActiveRecord::Migration + # class FixTLMigration < ActiveRecord::Migration[5.0] # def change # revert do # create_table(:horses) do |t| @@ -452,9 +656,9 @@ module ActiveRecord # Or equivalently, if +TenderloveMigration+ is defined as in the # documentation for Migration: # - # require_relative '2012121212_tenderlove_migration' + # require_relative '20121212123456_tenderlove_migration' # - # class FixupTLMigration < ActiveRecord::Migration + # class FixupTLMigration < ActiveRecord::Migration[5.0] # def change # revert TenderloveMigration # @@ -468,13 +672,13 @@ module ActiveRecord def revert(*migration_classes) run(*migration_classes.reverse, revert: true) unless migration_classes.empty? if block_given? - if @connection.respond_to? :revert - @connection.revert { yield } + if connection.respond_to? :revert + connection.revert { yield } else - recorder = CommandRecorder.new(@connection) + recorder = CommandRecorder.new(connection) @connection = recorder suppress_messages do - @connection.revert { yield } + connection.revert { yield } end @connection = recorder.delegate recorder.commands.each do |cmd, args, block| @@ -485,7 +689,7 @@ module ActiveRecord end def reverting? - @connection.respond_to?(:reverting) && @connection.reverting + connection.respond_to?(:reverting) && connection.reverting end class ReversibleBlockHelper < Struct.new(:reverting) # :nodoc: @@ -507,7 +711,7 @@ module ActiveRecord # when the three columns 'first_name', 'last_name' and 'full_name' exist, # even when migrating down: # - # class SplitNameMigration < ActiveRecord::Migration + # class SplitNameMigration < ActiveRecord::Migration[5.0] # def change # add_column :users, :first_name, :string # add_column :users, :last_name, :string @@ -542,7 +746,7 @@ module ActiveRecord revert { run(*migration_classes, direction: dir, revert: true) } else migration_classes.each do |migration_class| - migration_class.new.exec_migration(@connection, dir) + migration_class.new.exec_migration(connection, dir) end end end @@ -634,10 +838,11 @@ module ActiveRecord arg_list = arguments.map(&:inspect) * ', ' say_with_time "#{method}(#{arg_list})" do - unless @connection.respond_to? :revert + unless connection.respond_to? :revert unless arguments.empty? || [:execute, :enable_extension, :disable_extension].include?(method) arguments[0] = proper_table_name(arguments.first, table_name_options) - if [:rename_table, :add_foreign_key].include?(method) + if [:rename_table, :add_foreign_key].include?(method) || + (method == :remove_foreign_key && !arguments.second.is_a?(Hash)) arguments[1] = proper_table_name(arguments.second, table_name_options) end end @@ -712,7 +917,9 @@ module ActiveRecord end end - def table_name_options(config = ActiveRecord::Base) + # Builds a hash for use in ActiveRecord::Migration#proper_table_name using + # the Active Record object's table_name prefix and suffix + def table_name_options(config = ActiveRecord::Base) #:nodoc: { table_name_prefix: config.table_name_prefix, table_name_suffix: config.table_name_suffix @@ -804,7 +1011,7 @@ module ActiveRecord new(:up, migrations, target_version).migrate end - def down(migrations_paths, target_version = nil, &block) + def down(migrations_paths, target_version = nil) migrations = migrations(migrations_paths) migrations.select! { |m| yield m } if block_given? @@ -824,10 +1031,12 @@ module ActiveRecord end def get_all_versions(connection = Base.connection) - if connection.table_exists?(schema_migrations_table_name) - SchemaMigration.all.map { |x| x.version.to_i }.sort - else - [] + ActiveSupport::Deprecation.silence do + if connection.table_exists?(schema_migrations_table_name) + SchemaMigration.all.map { |x| x.version.to_i }.sort + else + [] + end end end @@ -843,22 +1052,22 @@ module ActiveRecord migrations(migrations_paths).any? end - def last_version - last_migration.version - end - def last_migration #:nodoc: migrations(migrations_paths).last || NullMigration.new end def migrations_paths @migrations_paths ||= ['db/migrate'] - # just to not break things if someone uses: migration_path = some_string + # just to not break things if someone uses: migrations_path = some_string Array(@migrations_paths) end - def migrations_path - migrations_paths.first + def match_to_migration_filename?(filename) # :nodoc: + File.basename(filename) =~ Migration::MigrationFilenameRegexp + end + + def parse_migration_filename(filename) # :nodoc: + File.basename(filename).scan(Migration::MigrationFilenameRegexp).first end def migrations(paths) @@ -867,8 +1076,7 @@ module ActiveRecord files = Dir[*paths.map { |p| "#{p}/**/[0-9]*_*.rb" }] migrations = files.map do |file| - version, name, scope = file.scan(/([0-9]+)_([_a-z0-9]*)\.?([_a-z0-9]*)?\.rb\z/).first - + version, name, scope = parse_migration_filename(file) raise IllegalMigrationNameError.new(file) unless version version = version.to_i name = name.camelize @@ -904,6 +1112,7 @@ module ActiveRecord validate(@migrations) Base.connection.initialize_schema_migrations_table + Base.connection.initialize_internal_metadata_table end def current_version @@ -916,32 +1125,18 @@ module ActiveRecord alias :current :current_migration def run - migration = migrations.detect { |m| m.version == @target_version } - raise UnknownMigrationVersionError.new(@target_version) if migration.nil? - unless (up? && migrated.include?(migration.version.to_i)) || (down? && !migrated.include?(migration.version.to_i)) - begin - execute_migration_in_transaction(migration, @direction) - rescue => e - canceled_msg = use_transaction?(migration) ? ", this migration was canceled" : "" - raise StandardError, "An error has occurred#{canceled_msg}:\n\n#{e}", e.backtrace - end + if use_advisory_lock? + with_advisory_lock { run_without_lock } + else + run_without_lock end end def migrate - if !target && @target_version && @target_version > 0 - raise UnknownMigrationVersionError.new(@target_version) - end - - runnable.each do |migration| - Base.logger.info "Migrating to #{migration.name} (#{migration.version})" if Base.logger - - begin - execute_migration_in_transaction(migration, @direction) - rescue => e - canceled_msg = use_transaction?(migration) ? "this and " : "" - raise StandardError, "An error has occurred, #{canceled_msg}all later migrations canceled:\n\n#{e}", e.backtrace - end + if use_advisory_lock? + with_advisory_lock { migrate_without_lock } + else + migrate_without_lock end end @@ -966,19 +1161,67 @@ module ActiveRecord end def migrated - @migrated_versions ||= Set.new(self.class.get_all_versions) + @migrated_versions || load_migrated + end + + def load_migrated + @migrated_versions = Set.new(self.class.get_all_versions) end private + + # Used for running a specific migration. + def run_without_lock + migration = migrations.detect { |m| m.version == @target_version } + raise UnknownMigrationVersionError.new(@target_version) if migration.nil? + execute_migration_in_transaction(migration, @direction) + + record_environment + end + + # Used for running multiple migrations up to or down to a certain value. + def migrate_without_lock + if invalid_target? + raise UnknownMigrationVersionError.new(@target_version) + end + + runnable.each do |migration| + execute_migration_in_transaction(migration, @direction) + end + + record_environment + end + + # Stores the current environment in the database. + def record_environment + return if down? + ActiveRecord::InternalMetadata[:environment] = ActiveRecord::Migrator.current_environment + end + def ran?(migration) migrated.include?(migration.version.to_i) end + # Return true if a valid version is not provided. + def invalid_target? + !target && @target_version && @target_version > 0 + end + def execute_migration_in_transaction(migration, direction) + return if down? && !migrated.include?(migration.version.to_i) + return if up? && migrated.include?(migration.version.to_i) + + Base.logger.info "Migrating to #{migration.name} (#{migration.version})" if Base.logger + ddl_transaction(migration) do migration.migrate(direction) record_version_state_after_migrating(migration.version) end + rescue => e + msg = "An error has occurred, " + msg << "this and " if use_transaction?(migration) + msg << "all later migrations canceled:\n\n#{e}" + raise StandardError, msg, e.backtrace end def target @@ -1007,10 +1250,27 @@ module ActiveRecord ActiveRecord::SchemaMigration.where(:version => version.to_s).delete_all else migrated << version - ActiveRecord::SchemaMigration.create!(:version => version.to_s) + ActiveRecord::SchemaMigration.create!(version: version.to_s) end end + def self.last_stored_environment + return nil if current_version == 0 + raise NoEnvironmentInSchemaError unless ActiveRecord::InternalMetadata.table_exists? + + environment = ActiveRecord::InternalMetadata[:environment] + raise NoEnvironmentInSchemaError unless environment + environment + end + + def self.current_environment + ActiveRecord::ConnectionHandling::DEFAULT_ENV.call + end + + def self.protected_environment? + ActiveRecord::Base.protected_environments.include?(last_stored_environment) if last_stored_environment + end + def up? @direction == :up end @@ -1031,5 +1291,25 @@ module ActiveRecord def use_transaction?(migration) !migration.disable_ddl_transaction && Base.connection.supports_ddl_transactions? end + + def use_advisory_lock? + Base.connection.supports_advisory_locks? + end + + def with_advisory_lock + lock_id = generate_migrator_advisory_lock_id + got_lock = Base.connection.get_advisory_lock(lock_id) + raise ConcurrentMigrationError unless got_lock + load_migrated # reload schema_migrations to be sure it wasn't changed by another process before we got the lock + yield + ensure + Base.connection.release_advisory_lock(lock_id) if got_lock + end + + MIGRATOR_SALT = 2053462845 + def generate_migrator_advisory_lock_id + db_name_hash = Zlib.crc32(Base.connection.current_database) + MIGRATOR_SALT * db_name_hash + end end end diff --git a/activerecord/lib/active_record/migration/command_recorder.rb b/activerecord/lib/active_record/migration/command_recorder.rb index 36256415df..0fa665c7e0 100644 --- a/activerecord/lib/active_record/migration/command_recorder.rb +++ b/activerecord/lib/active_record/migration/command_recorder.rb @@ -5,15 +5,36 @@ module ActiveRecord # knows how to invert the following commands: # # * add_column + # * add_foreign_key # * add_index + # * add_reference # * add_timestamps - # * create_table + # * change_column + # * change_column_default (must supply a :from and :to option) + # * change_column_null # * create_join_table + # * create_table + # * disable_extension + # * drop_join_table + # * drop_table (must supply a block) + # * enable_extension + # * remove_column (must supply a type) + # * remove_columns (must specify at least one column name or more) + # * remove_foreign_key (must supply a second table) + # * remove_index + # * remove_reference # * remove_timestamps # * rename_column # * rename_index # * rename_table class CommandRecorder + ReversibleAndIrreversibleMethods = [:create_table, :create_join_table, :rename_table, :add_column, :remove_column, + :rename_index, :rename_column, :add_index, :remove_index, :add_timestamps, :remove_timestamps, + :change_column_default, :add_reference, :remove_reference, :transaction, + :drop_join_table, :drop_table, :execute_block, :enable_extension, :disable_extension, + :change_column, :execute, :remove_columns, :change_column_null, + :add_foreign_key, :remove_foreign_key + ] include JoinTable attr_accessor :commands, :delegate, :reverting @@ -41,7 +62,7 @@ module ActiveRecord @reverting = !@reverting end - # record +command+. +command+ should be a method name and arguments. + # Record +command+. +command+ should be a method name and arguments. # For example: # # recorder.record(:method_name, [:arg1, :arg2]) @@ -62,7 +83,12 @@ module ActiveRecord # invert the +command+. def inverse_of(command, args, &block) method = :"invert_#{command}" - raise IrreversibleMigration unless respond_to?(method, true) + raise IrreversibleMigration, <<-MSG.strip_heredoc unless respond_to?(method, true) + This migration uses #{command}, which is not automatically reversible. + To make the migration reversible you can either: + 1. Define #up and #down methods in place of the #change method. + 2. Use the #reversible method to define reversible behavior. + MSG send(method, args, &block) end @@ -70,14 +96,7 @@ module ActiveRecord super || delegate.respond_to?(*args) end - [:create_table, :create_join_table, :rename_table, :add_column, :remove_column, - :rename_index, :rename_column, :add_index, :remove_index, :add_timestamps, :remove_timestamps, - :change_column_default, :add_reference, :remove_reference, :transaction, - :drop_join_table, :drop_table, :execute_block, :enable_extension, - :change_column, :execute, :remove_columns, :change_column_null, - :add_foreign_key, :remove_foreign_key - # irreversible methods need to be here too - ].each do |method| + ReversibleAndIrreversibleMethods.each do |method| class_eval <<-EOV, __FILE__, __LINE__ + 1 def #{method}(*args, &block) # def create_table(*args, &block) record(:"#{method}", args, &block) # record(:create_table, args, &block) @@ -151,19 +170,31 @@ module ActiveRecord end def invert_remove_index(args) - table, options = *args - - unless options && options.is_a?(Hash) && options[:column] - raise ActiveRecord::IrreversibleMigration, "remove_index is only reversible if given a :column option." + table, options_or_column = *args + if (options = options_or_column).is_a?(Hash) + unless options[:column] + raise ActiveRecord::IrreversibleMigration, "remove_index is only reversible if given a :column option." + end + options = options.dup + [:add_index, [table, options.delete(:column), options]] + elsif (column = options_or_column).present? + [:add_index, [table, column]] end - - options = options.dup - [:add_index, [table, options.delete(:column), options]] end alias :invert_add_belongs_to :invert_add_reference alias :invert_remove_belongs_to :invert_remove_reference + def invert_change_column_default(args) + table, column, options = *args + + unless options && options.is_a?(Hash) && options.has_key?(:from) && options.has_key?(:to) + raise ActiveRecord::IrreversibleMigration, "change_column_default is only reversible if given a :from and :to option." + end + + [:change_column_default, [table, column, from: options[:to], to: options[:from]]] + end + def invert_change_column_null(args) args[2] = !args[2] [:change_column_null, args] @@ -184,6 +215,16 @@ module ActiveRecord [:remove_foreign_key, [from_table, options]] end + def invert_remove_foreign_key(args) + from_table, to_table, remove_options = args + raise ActiveRecord::IrreversibleMigration, "remove_foreign_key is only reversible if given a second table" if to_table.nil? || to_table.is_a?(Hash) + + reversed_args = [from_table, to_table] + reversed_args << remove_options if remove_options + + [:add_foreign_key, reversed_args] + end + # Forwards any missing method call to the \target. def method_missing(method, *args, &block) if @delegate.respond_to?(method) diff --git a/activerecord/lib/active_record/migration/compatibility.rb b/activerecord/lib/active_record/migration/compatibility.rb new file mode 100644 index 0000000000..1b94573870 --- /dev/null +++ b/activerecord/lib/active_record/migration/compatibility.rb @@ -0,0 +1,91 @@ +module ActiveRecord + class Migration + module Compatibility # :nodoc: all + V5_0 = Current + + module FourTwoShared + module TableDefinition + def timestamps(*, **options) + options[:null] = true if options[:null].nil? + super + end + end + + def create_table(table_name, options = {}) + if block_given? + super(table_name, options) do |t| + class << t + prepend TableDefinition + end + yield t + end + else + super + end + end + + def add_timestamps(*, **options) + options[:null] = true if options[:null].nil? + super + end + + def index_exists?(table_name, column_name, options = {}) + column_names = Array(column_name).map(&:to_s) + options[:name] = + if options.key?(:name).present? + options[:name].to_s + else + index_name(table_name, column: column_names) + end + super + end + + def remove_index(table_name, options = {}) + options = { column: options } unless options.is_a?(Hash) + options[:name] = index_name_for_remove(table_name, options) + super(table_name, options) + end + + private + + def index_name_for_remove(table_name, options = {}) + index_name = index_name(table_name, options) + + unless index_name_exists?(table_name, index_name, true) + if options.is_a?(Hash) && options.has_key?(:name) + options_without_column = options.dup + options_without_column.delete :column + index_name_without_column = index_name(table_name, options_without_column) + + return index_name_without_column if index_name_exists?(table_name, index_name_without_column, false) + end + + raise ArgumentError, "Index name '#{index_name}' on table '#{table_name}' does not exist" + end + + index_name + end + end + + class V4_2 < V5_0 + # 4.2 is defined as a module because it needs to be shared with + # Legacy. When the time comes, V5_0 should be defined straight + # in its class. + include FourTwoShared + end + + module Legacy + include FourTwoShared + + def run(*) + ActiveSupport::Deprecation.warn \ + "Directly inheriting from ActiveRecord::Migration is deprecated. " \ + "Please specify the Rails release the migration was written for:\n" \ + "\n" \ + " class #{self.class.name} < ActiveRecord::Migration[4.2]" + super + end + end + end + end +end diff --git a/activerecord/lib/active_record/model_schema.rb b/activerecord/lib/active_record/model_schema.rb index 3674f672cb..f26c8471bc 100644 --- a/activerecord/lib/active_record/model_schema.rb +++ b/activerecord/lib/active_record/model_schema.rb @@ -44,12 +44,32 @@ module ActiveRecord ## # :singleton-method: + # Accessor for the name of the internal metadata table. By default, the value is "active_record_internal_metadatas" + class_attribute :internal_metadata_table_name, instance_accessor: false + self.internal_metadata_table_name = "active_record_internal_metadatas" + + ## + # :singleton-method: + # Accessor for an array of names of environments where destructive actions should be prohibited. By default, + # the value is ["production"] + class_attribute :protected_environments, instance_accessor: false + self.protected_environments = ["production"] + + ## + # :singleton-method: # Indicates whether table names should be the pluralized versions of the corresponding class names. # If true, the default table name for a Product class will be +products+. If false, it would just be +product+. # See table_name for the full rules on table/class naming. This is true, by default. class_attribute :pluralize_table_names, instance_writer: false self.pluralize_table_names = true + ## + # :singleton-method: + # Accessor for the list of columns names the model should ignore. Ignored columns won't have attribute + # accessors defined, and won't be referenced in SQL queries. + class_attribute :ignored_columns, instance_accessor: false + self.ignored_columns = [].freeze + self.inheritance_column = 'type' delegate :type_for_attribute, to: :class @@ -213,7 +233,7 @@ module ActiveRecord # Indicates whether the table associated with this class exists def table_exists? - connection.schema_cache.table_exists?(table_name) + connection.schema_cache.data_source_exists?(table_name) end def attributes_builder # :nodoc: @@ -240,7 +260,7 @@ module ActiveRecord end # Returns a hash where the keys are column names and the values are - # default values when instantiating the AR object for this table. + # default values when instantiating the Active Record object for this table. def column_defaults load_schema _default_attributes.to_hash @@ -268,7 +288,7 @@ module ActiveRecord # when just after creating a table you want to populate it with some default # values, eg: # - # class CreateJobLevels < ActiveRecord::Migration + # class CreateJobLevels < ActiveRecord::Migration[5.0] # def up # create_table :job_levels do |t| # t.integer :id @@ -290,7 +310,7 @@ module ActiveRecord def reset_column_information connection.clear_cache! undefine_attribute_methods - connection.schema_cache.clear_table_cache!(table_name) + connection.schema_cache.clear_data_source_cache!(table_name) reload_schema_from_cache end @@ -308,8 +328,9 @@ module ActiveRecord end def load_schema! - @columns_hash = connection.schema_cache.columns_hash(table_name) + @columns_hash = connection.schema_cache.columns_hash(table_name).except(*ignored_columns) @columns_hash.each do |name, column| + warn_if_deprecated_type(column) define_attribute( name, connection.lookup_cast_type_from_column(column), @@ -331,6 +352,9 @@ module ActiveRecord @columns = nil @columns_hash = nil @attribute_names = nil + direct_descendants.each do |descendant| + descendant.send(:reload_schema_from_cache) + end end # Guesses the table name, but does not decorate it with prefix and suffix information. @@ -356,6 +380,28 @@ module ActiveRecord base.table_name end end + + def warn_if_deprecated_type(column) + return if attributes_to_define_after_schema_loads.key?(column.name) + if column.respond_to?(:oid) && column.sql_type.start_with?("point") + if column.array? + array_arguments = ", array: true" + else + array_arguments = "" + end + ActiveSupport::Deprecation.warn(<<-WARNING.strip_heredoc) + The behavior of the `:point` type will be changing in Rails 5.1 to + return a `Point` object, rather than an `Array`. If you'd like to + keep the old behavior, you can add this line to #{self.name}: + + attribute :#{column.name}, :legacy_point#{array_arguments} + + If you'd like the new behavior today, you can add this line: + + attribute :#{column.name}, :point#{array_arguments} + WARNING + end + end end end end diff --git a/activerecord/lib/active_record/nested_attributes.rb b/activerecord/lib/active_record/nested_attributes.rb index c942d0e265..c5a1488588 100644 --- a/activerecord/lib/active_record/nested_attributes.rb +++ b/activerecord/lib/active_record/nested_attributes.rb @@ -386,6 +386,9 @@ module ActiveRecord # then the existing record will be marked for destruction. def assign_nested_attributes_for_one_to_one_association(association_name, attributes) options = self.nested_attributes_options[association_name] + if attributes.respond_to?(:permitted?) + attributes = attributes.to_h + end attributes = attributes.with_indifferent_access existing_record = send(association_name) @@ -442,6 +445,9 @@ module ActiveRecord # ]) def assign_nested_attributes_for_collection_association(association_name, attributes_collection) options = self.nested_attributes_options[association_name] + if attributes_collection.respond_to?(:permitted?) + attributes_collection = attributes_collection.to_h + end unless attributes_collection.is_a?(Hash) || attributes_collection.is_a?(Array) raise ArgumentError, "Hash or Array expected, got #{attributes_collection.class.name} (#{attributes_collection.inspect})" @@ -468,6 +474,9 @@ module ActiveRecord end attributes_collection.each do |attributes| + if attributes.respond_to?(:permitted?) + attributes = attributes.to_h + end attributes = attributes.with_indifferent_access if attributes['id'].blank? @@ -552,7 +561,9 @@ module ActiveRecord end def raise_nested_attributes_record_not_found!(association_name, record_id) - raise RecordNotFound, "Couldn't find #{self.class._reflect_on_association(association_name).klass.name} with ID=#{record_id} for #{self.class.name} with ID=#{id}" + model = self.class._reflect_on_association(association_name).klass.name + raise RecordNotFound.new("Couldn't find #{model} with ID=#{record_id} for #{self.class.name} with ID=#{id}", + model, 'id', record_id) end end end diff --git a/activerecord/lib/active_record/null_relation.rb b/activerecord/lib/active_record/null_relation.rb index 74894d0c37..0b500346bc 100644 --- a/activerecord/lib/active_record/null_relation.rb +++ b/activerecord/lib/active_record/null_relation.rb @@ -1,5 +1,3 @@ -# -*- coding: utf-8 -*- - module ActiveRecord module NullRelation # :nodoc: def exec_queries diff --git a/activerecord/lib/active_record/persistence.rb b/activerecord/lib/active_record/persistence.rb index 466175690e..522c35252f 100644 --- a/activerecord/lib/active_record/persistence.rb +++ b/activerecord/lib/active_record/persistence.rb @@ -1,5 +1,5 @@ module ActiveRecord - # = Active Record Persistence + # = Active Record \Persistence module Persistence extend ActiveSupport::Concern @@ -106,7 +106,7 @@ module ActiveRecord # the existing record gets updated. # # By default, save always run validations. If any of them fail the action - # is cancelled and +save+ returns +false+. However, if you supply + # is cancelled and #save returns +false+. However, if you supply # validate: false, validations are bypassed altogether. See # ActiveRecord::Validations for more information. # @@ -132,7 +132,7 @@ module ActiveRecord # If the model is new, a record gets created in the database, otherwise # the existing record gets updated. # - # With <tt>save!</tt> validations always run. If any of them fail + # With #save! validations always run. If any of them fail # ActiveRecord::RecordInvalid gets raised. See ActiveRecord::Validations # for more information. # @@ -158,7 +158,7 @@ module ActiveRecord # The row is simply removed with an SQL +DELETE+ statement on the # record's primary key, and no callbacks are executed. # - # Note that this will also delete records marked as <tt>readonly?</tt>. + # Note that this will also delete records marked as {#readonly?}[rdoc-ref:Core#readonly?]. # # To enforce the object's +before_destroy+ and +after_destroy+ # callbacks or any <tt>:dependent</tt> association @@ -193,7 +193,7 @@ module ActiveRecord # and #destroy! raises ActiveRecord::RecordNotDestroyed. # See ActiveRecord::Callbacks for further details. def destroy! - destroy || raise(RecordNotDestroyed.new("Failed to destroy the record", self)) + destroy || _raise_record_not_destroyed end # Returns an instance of the specified +klass+ with the attributes of the @@ -207,19 +207,19 @@ module ActiveRecord # Note: The new instance will share a link to the same attributes as the original class. # Therefore the sti column value will still be the same. # Any change to the attributes on either instance will affect both instances. - # If you want to change the sti column as well, use +becomes!+ instead. + # If you want to change the sti column as well, use #becomes! instead. def becomes(klass) became = klass.new became.instance_variable_set("@attributes", @attributes) - changed_attributes = @changed_attributes if defined?(@changed_attributes) - became.instance_variable_set("@changed_attributes", changed_attributes || {}) + became.instance_variable_set("@mutation_tracker", @mutation_tracker) if defined?(@mutation_tracker) + became.instance_variable_set("@changed_attributes", attributes_changed_by_setter) became.instance_variable_set("@new_record", new_record?) became.instance_variable_set("@destroyed", destroyed?) - became.instance_variable_set("@errors", errors) + became.errors.copy!(errors) became end - # Wrapper around +becomes+ that also changes the instance's sti column value. + # Wrapper around #becomes that also changes the instance's sti column value. # This is especially useful if you want to persist the changed class in your # database. # @@ -239,14 +239,14 @@ module ActiveRecord # This is especially useful for boolean flags on existing records. Also note that # # * Validation is skipped. - # * Callbacks are invoked. + # * \Callbacks are invoked. # * updated_at/updated_on column is updated if that column is available. # * Updates all the attributes that are dirty in this object. # - # This method raises an +ActiveRecord::ActiveRecordError+ if the + # This method raises an ActiveRecord::ActiveRecordError if the # attribute is marked as readonly. # - # See also +update_column+. + # See also #update_column. def update_attribute(name, value) name = name.to_s verify_readonly_attribute(name) @@ -268,7 +268,7 @@ module ActiveRecord alias update_attributes update - # Updates its receiver just like +update+ but calls <tt>save!</tt> instead + # Updates its receiver just like #update but calls #save! instead # of +save+, so an exception is raised if the record is invalid. def update!(attributes) # The following transaction covers any possible database side-effects of the @@ -295,11 +295,12 @@ module ActiveRecord # the database, but take into account that in consequence the regular update # procedures are totally bypassed. In particular: # - # * Validations are skipped. - # * Callbacks are skipped. + # * \Validations are skipped. + # * \Callbacks are skipped. # * +updated_at+/+updated_on+ are not updated. + # * However, attributes are serialized with the same rules as ActiveRecord::Relation#update_all # - # This method raises an +ActiveRecord::ActiveRecordError+ when called on new + # This method raises an ActiveRecord::ActiveRecordError when called on new # objects, or when at least one of the attributes is marked as readonly. def update_columns(attributes) raise ActiveRecordError, "cannot update a new record" if new_record? @@ -327,41 +328,51 @@ module ActiveRecord self end - # Wrapper around +increment+ that saves the record. This method differs from + # Wrapper around #increment that saves the record. This method differs from # its non-bang version in that it passes through the attribute setter. # Saving is not subjected to validation checks. Returns +true+ if the # record could be saved. def increment!(attribute, by = 1) - increment(attribute, by).update_attribute(attribute, self[attribute]) + increment(attribute, by) + change = public_send(attribute) - (attribute_was(attribute.to_s) || 0) + self.class.update_counters(id, attribute => change) + clear_attribute_change(attribute) # eww + self end # Initializes +attribute+ to zero if +nil+ and subtracts the value passed as +by+ (default is 1). # The decrement is performed directly on the underlying attribute, no setter is invoked. # Only makes sense for number-based attributes. Returns +self+. def decrement(attribute, by = 1) - self[attribute] ||= 0 - self[attribute] -= by - self + increment(attribute, -by) end - # Wrapper around +decrement+ that saves the record. This method differs from + # Wrapper around #decrement that saves the record. This method differs from # its non-bang version in that it passes through the attribute setter. # Saving is not subjected to validation checks. Returns +true+ if the # record could be saved. def decrement!(attribute, by = 1) - decrement(attribute, by).update_attribute(attribute, self[attribute]) + increment!(attribute, -by) end # Assigns to +attribute+ the boolean opposite of <tt>attribute?</tt>. So # if the predicate returns +true+ the attribute will become +false+. This # method toggles directly the underlying value without calling any setter. # Returns +self+. + # + # Example: + # + # user = User.first + # user.banned? # => false + # user.toggle(:banned) + # user.banned? # => true + # def toggle(attribute) self[attribute] = !public_send("#{attribute}?") self end - # Wrapper around +toggle+ that saves the record. This method differs from + # Wrapper around #toggle that saves the record. This method differs from # its non-bang version in that it passes through the attribute setter. # Saving is not subjected to validation checks. Returns +true+ if the # record could be saved. @@ -382,9 +393,9 @@ module ActiveRecord # # => #<Account id: 1, email: 'account@example.com'> # # Attributes are reloaded from the database, and caches busted, in - # particular the associations cache. + # particular the associations cache and the QueryCache. # - # If the record no longer exists in the database <tt>ActiveRecord::RecordNotFound</tt> + # If the record no longer exists in the database ActiveRecord::RecordNotFound # is raised. Otherwise, in addition to the in-place modification the method # returns +self+ for convenience. # @@ -418,6 +429,8 @@ module ActiveRecord # end # def reload(options = nil) + self.class.connection.clear_query_cache + fresh_object = if options && options[:lock] self.class.unscoped { self.class.lock(options[:lock]).find(id) } @@ -444,8 +457,8 @@ module ActiveRecord # product.touch(:designed_at) # updates the designed_at attribute and updated_at/on # product.touch(:started_at, :ended_at) # updates started_at, ended_at and updated_at/on attributes # - # If used along with +belongs_to+ then +touch+ will invoke +touch+ method on - # associated object. + # If used along with {belongs_to}[rdoc-ref:Associations::ClassMethods#belongs_to] + # then +touch+ will invoke +touch+ method on associated object. # # class Brake < ActiveRecord::Base # belongs_to :car, touch: true @@ -547,5 +560,16 @@ module ActiveRecord def verify_readonly_attribute(name) raise ActiveRecordError, "#{name} is marked as readonly" if self.class.readonly_attributes.include?(name) end + + def _raise_record_not_destroyed + @_association_destroy_exception ||= nil + raise @_association_destroy_exception || RecordNotDestroyed.new("Failed to destroy the record", self) + ensure + @_association_destroy_exception = nil + end + + def belongs_to_touch_method + :touch + end end end diff --git a/activerecord/lib/active_record/querying.rb b/activerecord/lib/active_record/querying.rb index 4e597590e9..1f429cfd94 100644 --- a/activerecord/lib/active_record/querying.rb +++ b/activerecord/lib/active_record/querying.rb @@ -6,8 +6,8 @@ module ActiveRecord delegate :find_or_create_by, :find_or_create_by!, :find_or_initialize_by, to: :all delegate :find_by, :find_by!, to: :all delegate :destroy, :destroy_all, :delete, :delete_all, :update, :update_all, to: :all - delegate :find_each, :find_in_batches, to: :all - delegate :select, :group, :order, :except, :reorder, :limit, :offset, :joins, :or, + delegate :find_each, :find_in_batches, :in_batches, to: :all + delegate :select, :group, :order, :except, :reorder, :limit, :offset, :joins, :left_joins, :left_outer_joins, :or, :where, :rewhere, :preload, :eager_load, :includes, :from, :lock, :readonly, :having, :create_with, :uniq, :distinct, :references, :none, :unscope, to: :all delegate :count, :average, :minimum, :maximum, :sum, :calculate, to: :all diff --git a/activerecord/lib/active_record/railtie.rb b/activerecord/lib/active_record/railtie.rb index 5af64b717a..38916f7376 100644 --- a/activerecord/lib/active_record/railtie.rb +++ b/activerecord/lib/active_record/railtie.rb @@ -16,11 +16,11 @@ module ActiveRecord config.app_generators.orm :active_record, :migration => true, :timestamps => true - config.app_middleware.insert_after "::ActionDispatch::Callbacks", - "ActiveRecord::QueryCache" + config.app_middleware.insert_after ::ActionDispatch::Callbacks, + ActiveRecord::QueryCache - config.app_middleware.insert_after "::ActionDispatch::Callbacks", - "ActiveRecord::ConnectionAdapters::ConnectionManagement" + config.app_middleware.insert_after ::ActionDispatch::Callbacks, + ActiveRecord::ConnectionAdapters::ConnectionManagement config.action_dispatch.rescue_responses.merge!( 'ActiveRecord::RecordNotFound' => :not_found, @@ -57,8 +57,10 @@ module ActiveRecord console do |app| require "active_record/railties/console_sandbox" if app.sandbox? require "active_record/base" - console = ActiveSupport::Logger.new(STDERR) - Rails.logger.extend ActiveSupport::Logger.broadcast console + unless ActiveSupport::Logger.logger_outputs_to?(Rails.logger, STDERR, STDOUT) + console = ActiveSupport::Logger.new(STDERR) + Rails.logger.extend ActiveSupport::Logger.broadcast console + end end runner do @@ -69,6 +71,7 @@ module ActiveRecord ActiveSupport.on_load(:active_record) do self.time_zone_aware_attributes = true self.default_timezone = :utc + self.time_zone_aware_types = ActiveRecord::Base.time_zone_aware_types end end @@ -78,8 +81,8 @@ module ActiveRecord initializer "active_record.migration_error" do if config.active_record.delete(:migration_error) == :page_load - config.app_middleware.insert_after "::ActionDispatch::Callbacks", - "ActiveRecord::Migration::CheckPending" + config.app_middleware.insert_after ::ActionDispatch::Callbacks, + ActiveRecord::Migration::CheckPending end end @@ -121,7 +124,7 @@ module ActiveRecord # This sets the database configuration from Configuration#database_configuration # and then establishes the connection. - initializer "active_record.initialize_database" do |app| + initializer "active_record.initialize_database" do ActiveSupport.on_load(:active_record) do self.configurations = Rails.application.config.database_configuration @@ -134,8 +137,8 @@ Oops - You have a database configured, but it doesn't exist yet! Here's how to get started: 1. Configure your database in config/database.yml. - 2. Run `bin/rake db:create` to create the database. - 3. Run `bin/rake db:setup` to load your database schema. + 2. Run `bin/rails db:create` to create the database. + 3. Run `bin/rails db:setup` to load your database schema. end_warning raise end @@ -156,8 +159,8 @@ end_warning ActiveSupport.on_load(:active_record) do ActionDispatch::Reloader.send(hook) do if ActiveRecord::Base.connected? - ActiveRecord::Base.clear_reloadable_connections! ActiveRecord::Base.clear_cache! + ActiveRecord::Base.clear_reloadable_connections! end end end diff --git a/activerecord/lib/active_record/railties/databases.rake b/activerecord/lib/active_record/railties/databases.rake index d168786e71..d81d6b54b3 100644 --- a/activerecord/lib/active_record/railties/databases.rake +++ b/activerecord/lib/active_record/railties/databases.rake @@ -1,6 +1,16 @@ require 'active_record' db_namespace = namespace :db do + desc "Set the environment value for the database" + task "environment:set" => [:environment, :load_config] do + ActiveRecord::InternalMetadata.create_table + ActiveRecord::InternalMetadata[:environment] = ActiveRecord::Migrator.current_environment + end + + task :check_protected_environments => [:environment, :load_config] do + ActiveRecord::Tasks::DatabaseTasks.check_protected_environments! + end + task :load_config do ActiveRecord::Base.configurations = ActiveRecord::Tasks::DatabaseTasks.database_configuration || {} ActiveRecord::Migrator.migrations_paths = ActiveRecord::Tasks::DatabaseTasks.migrations_paths @@ -12,45 +22,52 @@ db_namespace = namespace :db do end end - desc 'Creates the database from DATABASE_URL or config/database.yml for the current RAILS_ENV (use db:create:all to create all databases in the config). Without RAILS_ENV it defaults to creating the development and test databases.' + desc 'Creates the database from DATABASE_URL or config/database.yml for the current RAILS_ENV (use db:create:all to create all databases in the config). Without RAILS_ENV, it defaults to creating the development and test databases.' task :create => [:load_config] do ActiveRecord::Tasks::DatabaseTasks.create_current end namespace :drop do - task :all => :load_config do + task :all => [:load_config, :check_protected_environments] do ActiveRecord::Tasks::DatabaseTasks.drop_all end end - desc 'Drops the database from DATABASE_URL or config/database.yml for the current RAILS_ENV (use db:drop:all to drop all databases in the config). Without RAILS_ENV it defaults to dropping the development and test databases.' - task :drop => [:load_config] do + desc 'Drops the database from DATABASE_URL or config/database.yml for the current RAILS_ENV (use db:drop:all to drop all databases in the config). Without RAILS_ENV, it defaults to dropping the development and test databases.' + task :drop => [:load_config, :check_protected_environments] do + db_namespace["drop:_unsafe"].invoke + end + + task "drop:_unsafe" => [:load_config] do ActiveRecord::Tasks::DatabaseTasks.drop_current end namespace :purge do - task :all => :load_config do + task :all => [:load_config, :check_protected_environments] do ActiveRecord::Tasks::DatabaseTasks.purge_all end end - # desc "Empty the database from DATABASE_URL or config/database.yml for the current RAILS_ENV (use db:drop:all to drop all databases in the config). Without RAILS_ENV it defaults to purging the development and test databases." - task :purge => [:load_config] do + # desc "Empty the database from DATABASE_URL or config/database.yml for the current RAILS_ENV (use db:purge:all to purge all databases in the config). Without RAILS_ENV it defaults to purging the development and test databases." + task :purge => [:load_config, :check_protected_environments] do ActiveRecord::Tasks::DatabaseTasks.purge_current end desc "Migrate the database (options: VERSION=x, VERBOSE=false, SCOPE=blog)." task :migrate => [:environment, :load_config] do ActiveRecord::Tasks::DatabaseTasks.migrate - db_namespace['_dump'].invoke if ActiveRecord::Base.dump_schema_after_migration + db_namespace['_dump'].invoke end + # IMPORTANT: This task won't dump the schema if ActiveRecord::Base.dump_schema_after_migration is set to false task :_dump do - case ActiveRecord::Base.schema_format - when :ruby then db_namespace["schema:dump"].invoke - when :sql then db_namespace["structure:dump"].invoke - else - raise "unknown schema format #{ActiveRecord::Base.schema_format}" + if ActiveRecord::Base.dump_schema_after_migration + case ActiveRecord::Base.schema_format + when :ruby then db_namespace["schema:dump"].invoke + when :sql then db_namespace["structure:dump"].invoke + else + raise "unknown schema format #{ActiveRecord::Base.schema_format}" + end end # Allow this task to be called as many times as required. An example is the # migrate:redo task, which calls other two internally that depend on this one. @@ -76,7 +93,7 @@ db_namespace = namespace :db do task :up => [:environment, :load_config] do version = ENV['VERSION'] ? ENV['VERSION'].to_i : nil raise 'VERSION is required' unless version - ActiveRecord::Migrator.run(:up, ActiveRecord::Migrator.migrations_paths, version) + ActiveRecord::Migrator.run(:up, ActiveRecord::Tasks::DatabaseTasks.migrations_paths, version) db_namespace['_dump'].invoke end @@ -84,7 +101,7 @@ db_namespace = namespace :db do task :down => [:environment, :load_config] do version = ENV['VERSION'] ? ENV['VERSION'].to_i : nil raise 'VERSION is required - To go down one migration, run db:rollback' unless version - ActiveRecord::Migrator.run(:down, ActiveRecord::Migrator.migrations_paths, version) + ActiveRecord::Migrator.run(:down, ActiveRecord::Tasks::DatabaseTasks.migrations_paths, version) db_namespace['_dump'].invoke end @@ -96,13 +113,15 @@ db_namespace = namespace :db do db_list = ActiveRecord::SchemaMigration.normalized_versions file_list = - ActiveRecord::Migrator.migrations_paths.flat_map do |path| - # match "20091231235959_some_name.rb" and "001_some_name.rb" pattern - Dir.foreach(path).grep(/^(\d{3,})_(.+)\.rb$/) do - version = ActiveRecord::SchemaMigration.normalize_migration_number($1) + ActiveRecord::Tasks::DatabaseTasks.migrations_paths.flat_map do |path| + Dir.foreach(path).map do |file| + next unless ActiveRecord::Migrator.match_to_migration_filename?(file) + + version, name, scope = ActiveRecord::Migrator.parse_migration_filename(file) + version = ActiveRecord::SchemaMigration.normalize_migration_number(version) status = db_list.delete(version) ? 'up' : 'down' - [status, version, $2.humanize] - end + [status, version, (name + scope).humanize] + end.compact end db_list.map! do |version| @@ -122,22 +141,19 @@ db_namespace = namespace :db do desc 'Rolls the schema back to the previous version (specify steps w/ STEP=n).' task :rollback => [:environment, :load_config] do step = ENV['STEP'] ? ENV['STEP'].to_i : 1 - ActiveRecord::Migrator.rollback(ActiveRecord::Migrator.migrations_paths, step) + ActiveRecord::Migrator.rollback(ActiveRecord::Tasks::DatabaseTasks.migrations_paths, step) db_namespace['_dump'].invoke end # desc 'Pushes the schema to the next version (specify steps w/ STEP=n).' task :forward => [:environment, :load_config] do step = ENV['STEP'] ? ENV['STEP'].to_i : 1 - ActiveRecord::Migrator.forward(ActiveRecord::Migrator.migrations_paths, step) + ActiveRecord::Migrator.forward(ActiveRecord::Tasks::DatabaseTasks.migrations_paths, step) db_namespace['_dump'].invoke end # desc 'Drops and recreates the database from db/schema.rb for the current environment and loads the seeds.' - task :reset => [:environment, :load_config] do - db_namespace["drop"].invoke - db_namespace["setup"].invoke - end + task :reset => [ 'db:drop', 'db:setup' ] # desc "Retrieves the charset for the current environment's database" task :charset => [:environment, :load_config] do @@ -159,29 +175,29 @@ db_namespace = namespace :db do end # desc "Raises an error if there are pending migrations" - task :abort_if_pending_migrations => :environment do - pending_migrations = ActiveRecord::Migrator.open(ActiveRecord::Migrator.migrations_paths).pending_migrations + task :abort_if_pending_migrations => [:environment, :load_config] do + pending_migrations = ActiveRecord::Migrator.open(ActiveRecord::Tasks::DatabaseTasks.migrations_paths).pending_migrations if pending_migrations.any? puts "You have #{pending_migrations.size} pending #{pending_migrations.size > 1 ? 'migrations:' : 'migration:'}" pending_migrations.each do |pending_migration| puts ' %4d %s' % [pending_migration.version, pending_migration.name] end - abort %{Run `rake db:migrate` to update your database then try again.} + abort %{Run `rails db:migrate` to update your database then try again.} end end - desc 'Create the database, load the schema, and initialize with the seed data (use db:reset to also drop the database first)' + desc 'Creates the database, loads the schema, and initializes with the seed data (use db:reset to also drop the database first)' task :setup => ['db:schema:load_if_ruby', 'db:structure:load_if_sql', :seed] - desc 'Load the seed data from db/seeds.rb' + desc 'Loads the seed data from db/seeds.rb' task :seed do db_namespace['abort_if_pending_migrations'].invoke ActiveRecord::Tasks::DatabaseTasks.load_seed end namespace :fixtures do - desc "Load fixtures into the current environment's database. Load specific fixtures using FIXTURES=x,y. Load from subdirectory in test/fixtures using FIXTURES_DIR=z. Specify an alternative path (eg. spec/fixtures) using FIXTURES_PATH=spec/fixtures." + desc "Loads fixtures into the current environment's database. Load specific fixtures using FIXTURES=x,y. Load from subdirectory in test/fixtures using FIXTURES_DIR=z. Specify an alternative path (eg. spec/fixtures) using FIXTURES_PATH=spec/fixtures." task :load => [:environment, :load_config] do require 'active_record/fixtures' @@ -229,7 +245,7 @@ db_namespace = namespace :db do end namespace :schema do - desc 'Create a db/schema.rb file that is portable against any DB supported by AR' + desc 'Creates a db/schema.rb file that is portable against any DB supported by Active Record' task :dump => [:environment, :load_config] do require 'active_record/schema_dumper' filename = ENV['SCHEMA'] || File.join(ActiveRecord::Tasks::DatabaseTasks.db_dir, 'schema.rb') @@ -239,7 +255,7 @@ db_namespace = namespace :db do db_namespace['schema:dump'].reenable end - desc 'Load a schema.rb file into the database' + desc 'Loads a schema.rb file into the database' task :load => [:environment, :load_config] do ActiveRecord::Tasks::DatabaseTasks.load_schema_current(:ruby, ENV['SCHEMA']) end @@ -249,17 +265,17 @@ db_namespace = namespace :db do end namespace :cache do - desc 'Create a db/schema_cache.dump file.' + desc 'Creates a db/schema_cache.dump file.' task :dump => [:environment, :load_config] do con = ActiveRecord::Base.connection filename = File.join(ActiveRecord::Tasks::DatabaseTasks.db_dir, "schema_cache.dump") con.schema_cache.clear! - con.tables.each { |table| con.schema_cache.add(table) } + con.data_sources.each { |table| con.schema_cache.add(table) } open(filename, 'wb') { |f| f.write(Marshal.dump(con.schema_cache)) } end - desc 'Clear a db/schema_cache.dump file.' + desc 'Clears a db/schema_cache.dump file.' task :clear => [:environment, :load_config] do filename = File.join(ActiveRecord::Tasks::DatabaseTasks.db_dir, "schema_cache.dump") FileUtils.rm(filename) if File.exist?(filename) @@ -269,7 +285,7 @@ db_namespace = namespace :db do end namespace :structure do - desc 'Dump the database structure to db/structure.sql. Specify another file with SCHEMA=db/my_structure.sql' + desc 'Dumps the database structure to db/structure.sql. Specify another file with SCHEMA=db/my_structure.sql' task :dump => [:environment, :load_config] do filename = ENV['SCHEMA'] || File.join(ActiveRecord::Tasks::DatabaseTasks.db_dir, "structure.sql") current_config = ActiveRecord::Tasks::DatabaseTasks.current_config @@ -285,7 +301,7 @@ db_namespace = namespace :db do db_namespace['structure:dump'].reenable end - desc "Recreate the databases from the structure.sql file" + desc "Recreates the databases from the structure.sql file" task :load => [:load_config] do ActiveRecord::Tasks::DatabaseTasks.load_schema_current(:sql, ENV['SCHEMA']) end @@ -349,11 +365,11 @@ db_namespace = namespace :db do task :clone_structure => %w(db:test:deprecated db:structure:dump db:test:load_structure) # desc "Empty the test database" - task :purge => %w(environment load_config) do + task :purge => %w(environment load_config check_protected_environments) do ActiveRecord::Tasks::DatabaseTasks.purge ActiveRecord::Base.configurations['test'] end - # desc 'Check for pending migrations and load the test schema' + # desc 'Load the test schema' task :prepare => %w(environment load_config) do unless ActiveRecord::Base.configurations.blank? db_namespace['test:load'].invoke @@ -384,7 +400,7 @@ namespace :railties do puts "Copied migration #{migration.basename} from #{name}" end - ActiveRecord::Migration.copy(ActiveRecord::Migrator.migrations_paths.first, railties, + ActiveRecord::Migration.copy(ActiveRecord::Tasks::DatabaseTasks.migrations_paths.first, railties, :on_skip => on_skip, :on_copy => on_copy) end end diff --git a/activerecord/lib/active_record/reflection.rb b/activerecord/lib/active_record/reflection.rb index 5360db6a19..37e18626b5 100644 --- a/activerecord/lib/active_record/reflection.rb +++ b/activerecord/lib/active_record/reflection.rb @@ -32,6 +32,7 @@ module ActiveRecord end def self.add_reflection(ar, name, reflection) + ar.clear_reflections_cache ar._reflections = ar._reflections.merge(name.to_s => reflection) end @@ -61,24 +62,27 @@ module ActiveRecord aggregate_reflections[aggregation.to_s] end - # Returns a Hash of name of the reflection as the key and a AssociationReflection as the value. + # Returns a Hash of name of the reflection as the key and an AssociationReflection as the value. # # Account.reflections # => {"balance" => AggregateReflection} # - # @api public def reflections - ref = {} - _reflections.each do |name, reflection| - parent_reflection = reflection.parent_reflection + @__reflections ||= begin + ref = {} - if parent_reflection - parent_name = parent_reflection.name - ref[parent_name.to_s] = parent_reflection - else - ref[name] = reflection + _reflections.each do |name, reflection| + parent_reflection = reflection.parent_reflection + + if parent_reflection + parent_name = parent_reflection.name + ref[parent_name.to_s] = parent_reflection + else + ref[name] = reflection + end end + + ref end - ref end # Returns an array of AssociationReflection objects for all the @@ -91,10 +95,10 @@ module ActiveRecord # Account.reflect_on_all_associations # returns an array of all associations # Account.reflect_on_all_associations(:has_many) # returns an array of all has_many associations # - # @api public def reflect_on_all_associations(macro = nil) association_reflections = reflections.values - macro ? association_reflections.select { |reflection| reflection.macro == macro } : association_reflections + association_reflections.select! { |reflection| reflection.macro == macro } if macro + association_reflections end # Returns the AssociationReflection object for the +association+ (use the symbol). @@ -102,22 +106,22 @@ module ActiveRecord # Account.reflect_on_association(:owner) # returns the owner AssociationReflection # Invoice.reflect_on_association(:line_items).macro # returns :has_many # - # @api public def reflect_on_association(association) reflections[association.to_s] end - # @api private def _reflect_on_association(association) #:nodoc: _reflections[association.to_s] end # Returns an array of AssociationReflection objects for all associations which have <tt>:autosave</tt> enabled. - # - # @api public def reflect_on_all_autosave_associations reflections.values.select { |reflection| reflection.options[:autosave] } end + + def clear_reflections_cache # :nodoc: + @__reflections = nil + end end # Holds all the methods that are shared between MacroReflection, AssociationReflection @@ -159,6 +163,68 @@ module ActiveRecord scope_chain.flatten end + def counter_cache_column + if belongs_to? + if options[:counter_cache] == true + "#{active_record.name.demodulize.underscore.pluralize}_count" + elsif options[:counter_cache] + options[:counter_cache].to_s + end + else + options[:counter_cache] ? options[:counter_cache].to_s : "#{name}_count" + end + end + + def inverse_of + return unless inverse_name + + @inverse_of ||= klass._reflect_on_association inverse_name + end + + def check_validity_of_inverse! + unless polymorphic? + if has_inverse? && inverse_of.nil? + raise InverseOfAssociationNotFoundError.new(self) + end + end + end + + # This shit is nasty. We need to avoid the following situation: + # + # * An associated record is deleted via record.destroy + # * Hence the callbacks run, and they find a belongs_to on the record with a + # :counter_cache options which points back at our owner. So they update the + # counter cache. + # * In which case, we must make sure to *not* update the counter cache, or else + # it will be decremented twice. + # + # Hence this method. + def inverse_which_updates_counter_cache + return @inverse_which_updates_counter_cache if defined?(@inverse_which_updates_counter_cache) + @inverse_which_updates_counter_cache = klass.reflect_on_all_associations(:belongs_to).find do |inverse| + inverse.counter_cache_column == counter_cache_column + end + end + alias inverse_updates_counter_cache? inverse_which_updates_counter_cache + + def inverse_updates_counter_in_memory? + inverse_of && inverse_which_updates_counter_cache == inverse_of + end + + # Returns whether a counter cache should be used for this association. + # + # The counter_cache option must be given on either the owner or inverse + # association, and the column must be present on the owner. + def has_cached_counter? + options[:counter_cache] || + inverse_which_updates_counter_cache && inverse_which_updates_counter_cache.options[:counter_cache] && + !!active_record.columns_hash[counter_cache_column] + end + + def counter_must_be_updated_by_has_many? + !inverse_updates_counter_in_memory? && has_cached_counter? + end + def alias_candidate(name) "#{plural_name}_#{name}" end @@ -305,7 +371,7 @@ module ActiveRecord end def foreign_key - @foreign_key ||= options[:foreign_key] || derive_foreign_key + @foreign_key ||= options[:foreign_key] || derive_foreign_key.freeze end def association_foreign_key @@ -321,26 +387,10 @@ module ActiveRecord @active_record_primary_key ||= options[:primary_key] || primary_key(active_record) end - def counter_cache_column - if options[:counter_cache] == true - "#{active_record.name.demodulize.underscore.pluralize}_count" - elsif options[:counter_cache] - options[:counter_cache].to_s - end - end - def check_validity! check_validity_of_inverse! end - def check_validity_of_inverse! - unless polymorphic? - if has_inverse? && inverse_of.nil? - raise InverseOfAssociationNotFoundError.new(self) - end - end - end - def check_preloadable! return unless scope @@ -392,12 +442,6 @@ module ActiveRecord inverse_name end - def inverse_of - return unless inverse_name - - @inverse_of ||= klass._reflect_on_association inverse_name - end - def polymorphic_inverse_of(associated_class) if has_inverse? if inverse_relationship = associated_class._reflect_on_association(options[:inverse_of]) @@ -501,7 +545,7 @@ module ActiveRecord end end - # returns either nil or the inverse association name that it finds. + # returns either false or the inverse association name that it finds. def automatic_inverse_of if can_find_inverse_of_automatically?(self) inverse_name = ActiveSupport::Inflector.underscore(options[:as] || active_record.name.demodulize).to_sym @@ -880,6 +924,8 @@ module ActiveRecord klass.primary_key || raise(UnknownPrimaryKey.new(klass)) end + def inverse_name; delegate_reflection.send(:inverse_name); end + private def derive_class_name # get the class_name of the belongs_to association of the through reflection diff --git a/activerecord/lib/active_record/relation.rb b/activerecord/lib/active_record/relation.rb index 85648a7f8f..032b8d4c5d 100644 --- a/activerecord/lib/active_record/relation.rb +++ b/activerecord/lib/active_record/relation.rb @@ -1,20 +1,20 @@ -# -*- coding: utf-8 -*- require "arel/collectors/bind" module ActiveRecord - # = Active Record Relation + # = Active Record \Relation class Relation MULTI_VALUE_METHODS = [:includes, :eager_load, :preload, :select, :group, - :order, :joins, :references, + :order, :joins, :left_joins, :left_outer_joins, :references, :extending, :unscope] SINGLE_VALUE_METHODS = [:limit, :offset, :lock, :readonly, :reordering, - :reverse_order, :distinct, :create_with, :uniq] + :reverse_order, :distinct, :create_with] CLAUSE_METHODS = [:where, :having, :from] INVALID_METHODS_FOR_DELETE_ALL = [:limit, :distinct, :offset, :group, :having] VALUE_METHODS = MULTI_VALUE_METHODS + SINGLE_VALUE_METHODS + CLAUSE_METHODS + include Enumerable include FinderMethods, Calculations, SpawnMethods, QueryMethods, Batches, Explain, Delegation attr_reader :table, :klass, :loaded, :predicate_builder @@ -99,7 +99,7 @@ module ActiveRecord end substitutes = values.map do |(arel_attr, _)| - [arel_attr, connection.substitute_at(klass.columns_hash[arel_attr.name])] + [arel_attr, Arel::Nodes::BindParam.new] end [substitutes, binds] @@ -108,7 +108,7 @@ module ActiveRecord # Initializes new record from relation while maintaining the current # scope. # - # Expects arguments in the same format as +Base.new+. + # Expects arguments in the same format as {ActiveRecord::Base.new}[rdoc-ref:Core.new]. # # users = User.where(name: 'DHH') # user = users.new # => #<User id: nil, name: "DHH", created_at: nil, updated_at: nil> @@ -126,28 +126,32 @@ module ActiveRecord # Tries to create a new record with the same scoped attributes # defined in the relation. Returns the initialized object if validation fails. # - # Expects arguments in the same format as +Base.create+. + # Expects arguments in the same format as + # {ActiveRecord::Base.create}[rdoc-ref:Persistence::ClassMethods#create]. # # ==== Examples + # # users = User.where(name: 'Oscar') - # users.create # #<User id: 3, name: "oscar", ...> + # users.create # => #<User id: 3, name: "Oscar", ...> # # users.create(name: 'fxn') - # users.create # #<User id: 4, name: "fxn", ...> + # users.create # => #<User id: 4, name: "fxn", ...> # # users.create { |user| user.name = 'tenderlove' } - # # #<User id: 5, name: "tenderlove", ...> + # # => #<User id: 5, name: "tenderlove", ...> # # users.create(name: nil) # validation on name - # # #<User id: nil, name: nil, ...> + # # => #<User id: nil, name: nil, ...> def create(*args, &block) scoping { @klass.create(*args, &block) } end - # Similar to #create, but calls +create!+ on the base class. Raises - # an exception if a validation error occurs. + # Similar to #create, but calls + # {create!}[rdoc-ref:Persistence::ClassMethods#create!] + # on the base class. Raises an exception if a validation error occurs. # - # Expects arguments in the same format as <tt>Base.create!</tt>. + # Expects arguments in the same format as + # {ActiveRecord::Base.create!}[rdoc-ref:Persistence::ClassMethods#create!]. def create!(*args, &block) scoping { @klass.create!(*args, &block) } end @@ -181,7 +185,7 @@ module ActiveRecord # User.create_with(last_name: 'Johansson').find_or_create_by(first_name: 'Scarlett') # # => #<User id: 2, first_name: "Scarlett", last_name: "Johansson"> # - # This method accepts a block, which is passed down to +create+. The last example + # This method accepts a block, which is passed down to #create. The last example # above can be alternatively written this way: # # # Find the first user named "Scarlett" or create a new one with a @@ -193,7 +197,7 @@ module ActiveRecord # # This method always returns a record, but if creation was attempted and # failed due to validation errors it won't be persisted, you get what - # +create+ returns in such situation. + # #create returns in such situation. # # Please note *this method is not atomic*, it runs first a SELECT, and if # there are no results an INSERT is attempted. If there are other threads @@ -216,13 +220,15 @@ module ActiveRecord find_by(attributes) || create(attributes, &block) end - # Like <tt>find_or_create_by</tt>, but calls <tt>create!</tt> so an exception + # Like #find_or_create_by, but calls + # {create!}[rdoc-ref:Persistence::ClassMethods#create!] so an exception # is raised if the created record is invalid. def find_or_create_by!(attributes, &block) find_by(attributes) || create!(attributes, &block) end - # Like <tt>find_or_create_by</tt>, but calls <tt>new</tt> instead of <tt>create</tt>. + # Like #find_or_create_by, but calls {new}[rdoc-ref:Core#new] + # instead of {create}[rdoc-ref:Persistence::ClassMethods#create]. def find_or_initialize_by(attributes, &block) find_by(attributes) || new(attributes, &block) end @@ -275,38 +281,52 @@ module ActiveRecord # Returns true if there are no records. def none? - if block_given? - to_a.none? { |*block_args| yield(*block_args) } - else - empty? - end + return super if block_given? + empty? end # Returns true if there are any records. def any? - if block_given? - to_a.any? { |*block_args| yield(*block_args) } - else - !empty? - end + return super if block_given? + !empty? end # Returns true if there is exactly one record. def one? - if block_given? - to_a.one? { |*block_args| yield(*block_args) } - else - limit_value ? to_a.one? : size == 1 - end + return super if block_given? + limit_value ? to_a.one? : size == 1 end # Returns true if there is more than one record. def many? - if block_given? - to_a.many? { |*block_args| yield(*block_args) } - else - limit_value ? to_a.many? : size > 1 - end + return super if block_given? + limit_value ? to_a.many? : size > 1 + end + + # Returns a cache key that can be used to identify the records fetched by + # this query. The cache key is built with a fingerprint of the sql query, + # the number of records matched by the query and a timestamp of the last + # updated record. When a new record comes to match the query, or any of + # the existing records is updated or deleted, the cache key changes. + # + # Product.where("name like ?", "%Cosmic Encounter%").cache_key + # # => "products/query-1850ab3d302391b85b8693e941286659-1-20150714212553907087000" + # + # If the collection is loaded, the method will iterate through the records + # to generate the timestamp, otherwise it will trigger one SQL query like: + # + # SELECT COUNT(*), MAX("products"."updated_at") FROM "products" WHERE (name like '%Cosmic Encounter%') + # + # You can also pass a custom timestamp column to fetch the timestamp of the + # last updated record. + # + # Product.where("name like ?", "%Game%").cache_key(:last_reviewed_at) + # + # You can customize the strategy to generate the key on a per model basis + # overriding ActiveRecord::Base#collection_cache_key. + def cache_key(timestamp_column = :updated_at) + @cache_keys ||= {} + @cache_keys[timestamp_column] ||= @klass.collection_cache_key(self, timestamp_column) end # Scope all queries to the current scope. @@ -327,9 +347,8 @@ module ActiveRecord # Updates all records in the current relation with details given. This method constructs a single SQL UPDATE # statement and sends it straight to the database. It does not instantiate the involved models and it does not - # trigger Active Record callbacks or validations. Values passed to `update_all` will not go through - # ActiveRecord's type-casting behavior. It should receive only values that can be passed as-is to the SQL - # database. + # trigger Active Record callbacks or validations. However, values passed to #update_all will still go through + # Active Record's normal type casting and serialization. # # ==== Parameters # @@ -352,11 +371,11 @@ module ActiveRecord stmt.set Arel.sql(@klass.send(:sanitize_sql_for_assignment, updates)) stmt.table(table) - stmt.key = table[primary_key] if joins_values.any? - @klass.connection.join_to_update(stmt, arel) + @klass.connection.join_to_update(stmt, arel, table[primary_key]) else + stmt.key = table[primary_key] stmt.take(arel.limit) stmt.order(*arel.orders) stmt.wheres = arel.constraints @@ -386,27 +405,34 @@ module ActiveRecord # people = Person.where(group: 'expert') # people.update(group: 'masters') # - # Note: Updating a large number of records will run a - # UPDATE query for each record, which may cause a performance - # issue. So if it is not needed to run callbacks for each update, it is - # preferred to use <tt>update_all</tt> for updating all records using - # a single query. + # Note: Updating a large number of records will run an + # UPDATE query for each record, which may cause a performance + # issue. So if it is not needed to run callbacks for each update, it is + # preferred to use #update_all for updating all records using + # a single query. def update(id = :all, attributes) if id.is_a?(Array) id.map.with_index { |one_id, idx| update(one_id, attributes[idx]) } elsif id == :all to_a.each { |record| record.update(attributes) } else + if ActiveRecord::Base === id + id = id.id + ActiveSupport::Deprecation.warn(<<-MSG.squish) + You are passing an instance of ActiveRecord::Base to `update`. + Please pass the id of the object by calling `.id` + MSG + end object = find(id) object.update(attributes) object end end - # Destroys the records matching +conditions+ by instantiating each - # record and calling its +destroy+ method. Each object's callbacks are - # executed (including <tt>:dependent</tt> association options). Returns the - # collection of objects that were destroyed; each will be frozen, to + # Destroys the records by instantiating each + # record and calling its {#destroy}[rdoc-ref:Persistence#destroy] method. + # Each object's callbacks are executed (including <tt>:dependent</tt> association options). + # Returns the collection of objects that were destroyed; each will be frozen, to # reflect that no changes should be made (since they can't be persisted). # # Note: Instantiation, callback execution, and deletion of each @@ -414,22 +440,17 @@ module ActiveRecord # once. It generates at least one SQL +DELETE+ query per record (or # possibly more, to enforce your callbacks). If you want to delete many # rows quickly, without concern for their associations or callbacks, use - # +delete_all+ instead. - # - # ==== Parameters - # - # * +conditions+ - A string, array, or hash that specifies which records - # to destroy. If omitted, all records are destroyed. See the - # Conditions section in the introduction to ActiveRecord::Base for - # more information. + # #delete_all instead. # # ==== Examples # - # Person.destroy_all("last_login < '2004-04-04'") - # Person.destroy_all(status: "inactive") # Person.where(age: 0..18).destroy_all def destroy_all(conditions = nil) if conditions + ActiveSupport::Deprecation.warn(<<-MESSAGE.squish) + Passing conditions to destroy_all is deprecated and will be removed in Rails 5.1. + To achieve the same use where(conditions).destroy_all + MESSAGE where(conditions).destroy_all else to_a.each(&:destroy).tap { reset } @@ -438,7 +459,7 @@ module ActiveRecord # Destroy an object (or multiple objects) that has the given id. The object is instantiated first, # therefore all callbacks and filters are fired off before the object is deleted. This method is - # less efficient than ActiveRecord#delete but allows cleanup methods and other actions to be run. + # less efficient than #delete but allows cleanup methods and other actions to be run. # # This essentially finds the object (or multiple objects) with the given id, creates a new object # from the attributes, and then calls destroy on it. @@ -463,22 +484,21 @@ module ActiveRecord end end - # Deletes the records matching +conditions+ without instantiating the records - # first, and hence not calling the +destroy+ method nor invoking callbacks. This - # is a single SQL DELETE statement that goes straight to the database, much more - # efficient than +destroy_all+. Be careful with relations though, in particular + # Deletes the records without instantiating the records + # first, and hence not calling the {#destroy}[rdoc-ref:Persistence#destroy] + # method nor invoking callbacks. + # This is a single SQL DELETE statement that goes straight to the database, much more + # efficient than #destroy_all. Be careful with relations though, in particular # <tt>:dependent</tt> rules defined on associations are not honored. Returns the # number of rows affected. # - # Post.delete_all("person_id = 5 AND (category = 'Something' OR category = 'Else')") - # Post.delete_all(["person_id = ? AND (category = ? OR category = ?)", 5, 'Something', 'Else']) # Post.where(person_id: 5).where(category: ['Something', 'Else']).delete_all # # Both calls delete the affected posts all at once with a single DELETE statement. # If you need to destroy dependent associations or call your <tt>before_*</tt> or - # +after_destroy+ callbacks, use the +destroy_all+ method instead. + # +after_destroy+ callbacks, use the #destroy_all method instead. # - # If an invalid method is supplied, +delete_all+ raises an ActiveRecord error: + # If an invalid method is supplied, #delete_all raises an ActiveRecordError: # # Post.limit(100).delete_all # # => ActiveRecord::ActiveRecordError: delete_all doesn't support limit @@ -497,6 +517,10 @@ module ActiveRecord end if conditions + ActiveSupport::Deprecation.warn(<<-MESSAGE.squish) + Passing conditions to delete_all is deprecated and will be removed in Rails 5.1. + To achieve the same use where(conditions).delete_all + MESSAGE where(conditions).delete_all else stmt = Arel::DeleteManager.new @@ -523,7 +547,7 @@ module ActiveRecord # You can delete multiple rows at once by passing an Array of <tt>id</tt>s. # # Note: Although it is often much faster than the alternative, - # <tt>#destroy</tt>, skipping callbacks might bypass business logic in + # #destroy, skipping callbacks might bypass business logic in # your application that ensures referential integrity or performs other # essential jobs. # @@ -613,11 +637,14 @@ module ActiveRecord includes_values & joins_values end - # +uniq+ and +uniq!+ are silently deprecated. +uniq_value+ delegates to +distinct_value+ - # to maintain backwards compatibility. Use +distinct_value+ instead. + # {#uniq}[rdoc-ref:QueryMethods#uniq] and + # {#uniq!}[rdoc-ref:QueryMethods#uniq!] are silently deprecated. + # #uniq_value delegates to #distinct_value to maintain backwards compatibility. + # Use #distinct_value instead. def uniq_value distinct_value end + deprecate uniq_value: :distinct_value # Compares two relations for equality. def ==(other) @@ -651,6 +678,13 @@ module ActiveRecord "#<#{self.class.name} [#{entries.join(', ')}]>" end + protected + + def load_records(records) + @records = records + @loaded = true + end + private def exec_queries diff --git a/activerecord/lib/active_record/relation/batches.rb b/activerecord/lib/active_record/relation/batches.rb index e07580a563..221bc73680 100644 --- a/activerecord/lib/active_record/relation/batches.rb +++ b/activerecord/lib/active_record/relation/batches.rb @@ -1,8 +1,10 @@ +require "active_record/relation/batches/batch_enumerator" + module ActiveRecord module Batches # Looping through a collection of records from the database - # (using the +all+ method, for example) is very inefficient - # since it will try to instantiate all the objects at once. + # (using the Scoping::Named::ClassMethods.all method, for example) + # is very inefficient since it will try to instantiate all the objects at once. # # In that case, batch processing methods allow you to work # with the records in batches, thereby greatly reducing memory consumption. @@ -122,24 +124,102 @@ module ActiveRecord end end + in_batches(of: batch_size, begin_at: begin_at, end_at: end_at, load: true) do |batch| + yield batch.to_a + end + end + + # Yields ActiveRecord::Relation objects to work with a batch of records. + # + # Person.where("age > 21").in_batches do |relation| + # relation.delete_all + # sleep(10) # Throttle the delete queries + # end + # + # If you do not provide a block to #in_batches, it will return a + # BatchEnumerator which is enumerable. + # + # Person.in_batches.with_index do |relation, batch_index| + # puts "Processing relation ##{batch_index}" + # relation.each { |relation| relation.delete_all } + # end + # + # Examples of calling methods on the returned BatchEnumerator object: + # + # Person.in_batches.delete_all + # Person.in_batches.update_all(awesome: true) + # Person.in_batches.each_record(&:party_all_night!) + # + # ==== Options + # * <tt>:of</tt> - Specifies the size of the batch. Default to 1000. + # * <tt>:load</tt> - Specifies if the relation should be loaded. Default to false. + # * <tt>:begin_at</tt> - Specifies the primary key value to start from, inclusive of the value. + # * <tt>:end_at</tt> - Specifies the primary key value to end at, inclusive of the value. + # + # This is especially useful if you want to work with the + # ActiveRecord::Relation object instead of the array of records, or if + # you want multiple workers dealing with the same processing queue. You can + # make worker 1 handle all the records between id 0 and 10,000 and worker 2 + # handle from 10,000 and beyond (by setting the +:begin_at+ and +:end_at+ + # option on each worker). + # + # # Let's process the next 2000 records + # Person.in_batches(of: 2000, begin_at: 2000).update_all(awesome: true) + # + # An example of calling where query method on the relation: + # + # Person.in_batches.each do |relation| + # relation.update_all('age = age + 1') + # relation.where('age > 21').update_all(should_party: true) + # relation.where('age <= 21').delete_all + # end + # + # NOTE: If you are going to iterate through each record, you should call + # #each_record on the yielded BatchEnumerator: + # + # Person.in_batches.each_record(&:party_all_night!) + # + # NOTE: It's not possible to set the order. That is automatically set to + # ascending on the primary key ("id ASC") to make the batch ordering + # consistent. Therefore the primary key must be orderable, e.g an integer + # or a string. + # + # NOTE: You can't set the limit either, that's used to control the batch + # sizes. + def in_batches(of: 1000, begin_at: nil, end_at: nil, load: false) + relation = self + unless block_given? + return BatchEnumerator.new(of: of, begin_at: begin_at, end_at: end_at, relation: self) + end + if logger && (arel.orders.present? || arel.taken.present?) logger.warn("Scoped order and limit are ignored, it's forced to be batch order and batch size") end - relation = relation.reorder(batch_order).limit(batch_size) + relation = relation.reorder(batch_order).limit(of) relation = apply_limits(relation, begin_at, end_at) - records = relation.to_a + batch_relation = relation + + loop do + if load + records = batch_relation.to_a + ids = records.map(&:id) + yielded_relation = self.where(primary_key => ids) + yielded_relation.load_records(records) + else + ids = batch_relation.pluck(primary_key) + yielded_relation = self.where(primary_key => ids) + end - while records.any? - records_size = records.size - primary_key_offset = records.last.id - raise "Primary key not included in the custom select clause" unless primary_key_offset + break if ids.empty? - yield records + primary_key_offset = ids.last + raise ArgumentError.new("Primary key not included in the custom select clause") unless primary_key_offset - break if records_size < batch_size + yield yielded_relation - records = relation.where(table[primary_key].gt(primary_key_offset)).to_a + break if ids.length < of + batch_relation = relation.where(table[primary_key].gt(primary_key_offset)) end end diff --git a/activerecord/lib/active_record/relation/batches/batch_enumerator.rb b/activerecord/lib/active_record/relation/batches/batch_enumerator.rb new file mode 100644 index 0000000000..153aae9584 --- /dev/null +++ b/activerecord/lib/active_record/relation/batches/batch_enumerator.rb @@ -0,0 +1,67 @@ +module ActiveRecord + module Batches + class BatchEnumerator + include Enumerable + + def initialize(of: 1000, begin_at: nil, end_at: nil, relation:) #:nodoc: + @of = of + @relation = relation + @begin_at = begin_at + @end_at = end_at + end + + # Looping through a collection of records from the database (using the + # +all+ method, for example) is very inefficient since it will try to + # instantiate all the objects at once. + # + # In that case, batch processing methods allow you to work with the + # records in batches, thereby greatly reducing memory consumption. + # + # Person.in_batches.each_record do |person| + # person.do_awesome_stuff + # end + # + # Person.where("age > 21").in_batches(of: 10).each_record do |person| + # person.party_all_night! + # end + # + # If you do not provide a block to #each_record, it will return an Enumerator + # for chaining with other methods: + # + # Person.in_batches.each_record.with_index do |person, index| + # person.award_trophy(index + 1) + # end + def each_record + return to_enum(:each_record) unless block_given? + + @relation.to_enum(:in_batches, of: @of, begin_at: @begin_at, end_at: @end_at, load: true).each do |relation| + relation.to_a.each { |record| yield record } + end + end + + # Delegates #delete_all, #update_all, #destroy_all methods to each batch. + # + # People.in_batches.delete_all + # People.in_batches.destroy_all('age < 10') + # People.in_batches.update_all('age = age + 1') + [:delete_all, :update_all, :destroy_all].each do |method| + define_method(method) do |*args, &block| + @relation.to_enum(:in_batches, of: @of, begin_at: @begin_at, end_at: @end_at, load: false).each do |relation| + relation.send(method, *args, &block) + end + end + end + + # Yields an ActiveRecord::Relation object for each batch of records. + # + # Person.in_batches.each do |relation| + # relation.update_all(awesome: true) + # end + def each + enum = @relation.to_enum(:in_batches, of: @of, begin_at: @begin_at, end_at: @end_at, load: false) + return enum.each { |relation| yield relation } if block_given? + enum + end + end + end +end diff --git a/activerecord/lib/active_record/relation/calculations.rb b/activerecord/lib/active_record/relation/calculations.rb index 402b317d9c..f45844a9ea 100644 --- a/activerecord/lib/active_record/relation/calculations.rb +++ b/activerecord/lib/active_record/relation/calculations.rb @@ -14,33 +14,34 @@ module ActiveRecord # Person.distinct.count(:age) # # => counts the number of different age values # - # If +count+ is used with +group+, it returns a Hash whose keys represent the aggregated column, + # If #count is used with {Relation#group}[rdoc-ref:QueryMethods#group], + # it returns a Hash whose keys represent the aggregated column, # and the values are the respective amounts: # # Person.group(:city).count # # => { 'Rome' => 5, 'Paris' => 3 } # - # If +count+ is used with +group+ for multiple columns, it returns a Hash whose + # If #count is used with {Relation#group}[rdoc-ref:QueryMethods#group] for multiple columns, it returns a Hash whose # keys are an array containing the individual values of each column and the value - # of each key would be the +count+. + # of each key would be the #count. # # Article.group(:status, :category).count # # => {["draft", "business"]=>10, ["draft", "technology"]=>4, # ["published", "business"]=>0, ["published", "technology"]=>2} # - # If +count+ is used with +select+, it will count the selected columns: + # If #count is used with {Relation#select}[rdoc-ref:QueryMethods#select], it will count the selected columns: # # Person.select(:age).count # # => counts the number of different age values # - # Note: not all valid +select+ expressions are valid +count+ expressions. The specifics differ + # Note: not all valid {Relation#select}[rdoc-ref:QueryMethods#select] expressions are valid #count expressions. The specifics differ # between databases. In invalid cases, an error from the database is thrown. def count(column_name = nil) calculate(:count, column_name) end # Calculates the average value on a given column. Returns +nil+ if there's - # no row. See +calculate+ for examples with options. + # no row. See #calculate for examples with options. # # Person.average(:age) # => 35.8 def average(column_name) @@ -49,7 +50,7 @@ module ActiveRecord # Calculates the minimum value on a given column. The value is returned # with the same data type of the column, or +nil+ if there's no row. See - # +calculate+ for examples with options. + # #calculate for examples with options. # # Person.minimum(:age) # => 7 def minimum(column_name) @@ -58,7 +59,7 @@ module ActiveRecord # Calculates the maximum value on a given column. The value is returned # with the same data type of the column, or +nil+ if there's no row. See - # +calculate+ for examples with options. + # #calculate for examples with options. # # Person.maximum(:age) # => 93 def maximum(column_name) @@ -66,45 +67,46 @@ module ActiveRecord end # Calculates the sum of values on a given column. The value is returned - # with the same data type of the column, 0 if there's no row. See - # +calculate+ for examples with options. + # with the same data type of the column, +0+ if there's no row. See + # #calculate for examples with options. # # Person.sum(:age) # => 4562 - def sum(*args) - calculate(:sum, *args) + def sum(column_name = nil, &block) + return super(&block) if block_given? + calculate(:sum, column_name) end - # This calculates aggregate values in the given column. Methods for count, sum, average, - # minimum, and maximum have been added as shortcuts. + # This calculates aggregate values in the given column. Methods for #count, #sum, #average, + # #minimum, and #maximum have been added as shortcuts. # - # There are two basic forms of output: + # Person.calculate(:count, :all) # The same as Person.count + # Person.average(:age) # SELECT AVG(age) FROM people... # - # * Single aggregate value: The single value is type cast to Fixnum for COUNT, Float - # for AVG, and the given column's type for everything else. + # # Selects the minimum age for any family without any minors + # Person.group(:last_name).having("min(age) > 17").minimum(:age) # - # * Grouped values: This returns an ordered hash of the values and groups them. It - # takes either a column name, or the name of a belongs_to association. + # Person.sum("2 * age") # - # values = Person.group('last_name').maximum(:age) - # puts values["Drake"] - # # => 43 + # There are two basic forms of output: # - # drake = Family.find_by(last_name: 'Drake') - # values = Person.group(:family).maximum(:age) # Person belongs_to :family - # puts values[drake] - # # => 43 + # * Single aggregate value: The single value is type cast to Fixnum for COUNT, Float + # for AVG, and the given column's type for everything else. # - # values.each do |family, max_age| - # ... - # end + # * Grouped values: This returns an ordered hash of the values and groups them. It + # takes either a column name, or the name of a belongs_to association. # - # Person.calculate(:count, :all) # The same as Person.count - # Person.average(:age) # SELECT AVG(age) FROM people... + # values = Person.group('last_name').maximum(:age) + # puts values["Drake"] + # # => 43 # - # # Selects the minimum age for any family without any minors - # Person.group(:last_name).having("min(age) > 17").minimum(:age) + # drake = Family.find_by(last_name: 'Drake') + # values = Person.group(:family).maximum(:age) # Person belongs_to :family + # puts values[drake] + # # => 43 # - # Person.sum("2 * age") + # values.each do |family, max_age| + # ... + # end def calculate(operation, column_name) if column_name.is_a?(Symbol) && attribute_alias?(column_name) column_name = attribute_alias(column_name) @@ -117,7 +119,7 @@ module ActiveRecord end end - # Use <tt>pluck</tt> as a shortcut to select one or more attributes without + # Use #pluck as a shortcut to select one or more attributes without # loading a bunch of records just to grab the attributes you want. # # Person.pluck(:name) @@ -126,7 +128,7 @@ module ActiveRecord # # Person.all.map(&:name) # - # Pluck returns an <tt>Array</tt> of attribute values type-casted to match + # Pluck returns an Array of attribute values type-casted to match # the plucked column names, if they can be deduced. Plucking an SQL fragment # returns String values by default. # @@ -138,7 +140,7 @@ module ActiveRecord # # SELECT people.id, people.name FROM people # # => [[1, 'David'], [2, 'Jeremy'], [3, 'Jose']] # - # Person.pluck('DISTINCT role') + # Person.distinct.pluck(:role) # # SELECT DISTINCT role FROM people # # => ['admin', 'member', 'guest'] # @@ -150,7 +152,7 @@ module ActiveRecord # # SELECT DATEDIFF(updated_at, created_at) FROM people # # => ['0', '27761', '173'] # - # See also +ids+. + # See also #ids. # def pluck(*column_names) column_names.map! do |column_name| @@ -161,6 +163,10 @@ module ActiveRecord end end + if loaded? && (column_names - @klass.column_names).empty? + return @records.pluck(*column_names) + end + if has_include?(column_names.first) construct_relation_for_association_calculations.pluck(*column_names) else @@ -190,7 +196,8 @@ module ActiveRecord def perform_calculation(operation, column_name) operation = operation.to_s.downcase - # If #count is used with #distinct / #uniq it is considered distinct. (eg. relation.distinct.count) + # If #count is used with #distinct (i.e. `relation.distinct.count`) it is + # considered distinct. distinct = self.distinct_value if operation == "count" @@ -212,6 +219,8 @@ module ActiveRecord end def aggregate_column(column_name) + return column_name if Arel::Expressions === column_name + if @klass.column_names.include?(column_name.to_s) Arel::Attribute.new(@klass.unscoped.table, column_name) else @@ -266,15 +275,10 @@ module ActiveRecord else group_fields = group_attrs end + group_fields = arel_columns(group_fields) - group_aliases = group_fields.map { |field| - column_alias_for(field) - } - group_columns = group_aliases.zip(group_fields).map { |aliaz,field| - [aliaz, field] - } - - group = group_fields + group_aliases = group_fields.map { |field| column_alias_for(field) } + group_columns = group_aliases.zip(group_fields) if operation == 'count' && column_name == :all aggregate_alias = 'count_all' @@ -290,7 +294,7 @@ module ActiveRecord ] select_values += select_values unless having_clause.empty? - select_values.concat group_fields.zip(group_aliases).map { |field,aliaz| + select_values.concat group_columns.map { |aliaz, field| if field.respond_to?(:as) field.as(aliaz) else @@ -299,7 +303,7 @@ module ActiveRecord } relation = except(:group) - relation.group_values = group + relation.group_values = group_fields relation.select_values = select_values calculated_data = @klass.connection.select_all(relation, nil, relation.bound_attributes) @@ -332,7 +336,6 @@ module ActiveRecord # column_alias_for("sum(id)") # => "sum_id" # column_alias_for("count(distinct users.id)") # => "count_distinct_users_id" # column_alias_for("count(*)") # => "count_all" - # column_alias_for("count", "id") # => "count_id" def column_alias_for(keys) if keys.respond_to? :name keys = "#{keys.relation.name}.#{keys.name}" @@ -361,9 +364,9 @@ module ActiveRecord end end - # TODO: refactor to allow non-string `select_values` (eg. Arel nodes). def select_for_count if select_values.present? + return select_values.first if select_values.one? select_values.join(", ") else :all diff --git a/activerecord/lib/active_record/relation/delegation.rb b/activerecord/lib/active_record/relation/delegation.rb index d4a8823cfe..e4e5d63006 100644 --- a/activerecord/lib/active_record/relation/delegation.rb +++ b/activerecord/lib/active_record/relation/delegation.rb @@ -3,12 +3,12 @@ require 'active_support/concern' module ActiveRecord module Delegation # :nodoc: - module DelegateCache - def relation_delegate_class(klass) # :nodoc: + module DelegateCache # :nodoc: + def relation_delegate_class(klass) @relation_delegate_cache[klass] end - def initialize_relation_delegate_cache # :nodoc: + def initialize_relation_delegate_cache @relation_delegate_cache = cache = {} [ ActiveRecord::Relation, @@ -18,7 +18,7 @@ module ActiveRecord delegate = Class.new(klass) { include ClassSpecificRelation } - const_set klass.name.gsub('::', '_'), delegate + const_set klass.name.gsub('::'.freeze, '_'.freeze), delegate cache[klass] = delegate end end @@ -36,13 +36,8 @@ module ActiveRecord # may vary depending on the klass of a relation, so we create a subclass of Relation # for each different klass, and the delegations are compiled into that subclass only. - BLACKLISTED_ARRAY_METHODS = [ - :compact!, :flatten!, :reject!, :reverse!, :rotate!, :map!, - :shuffle!, :slice!, :sort!, :sort_by!, :delete_if, - :keep_if, :pop, :shift, :delete_at, :compact, :select! - ].to_set # :nodoc: - - delegate :to_xml, :to_yaml, :length, :collect, :map, :each, :all?, :include?, :to_ary, :join, to: :to_a + delegate :to_xml, :to_yaml, :length, :collect, :map, :each, :all?, :include?, :to_ary, :join, + :[], :&, :|, :+, :-, :sample, :shuffle, :reverse, :compact, to: :to_a delegate :table_name, :quoted_table_name, :primary_key, :quoted_primary_key, :connection, :columns_hash, :to => :klass @@ -114,21 +109,14 @@ module ActiveRecord def respond_to?(method, include_private = false) super || @klass.respond_to?(method, include_private) || - array_delegable?(method) || arel.respond_to?(method, include_private) end protected - def array_delegable?(method) - Array.method_defined?(method) && BLACKLISTED_ARRAY_METHODS.exclude?(method) - end - def method_missing(method, *args, &block) if @klass.respond_to?(method) scoping { @klass.public_send(method, *args, &block) } - elsif array_delegable?(method) - to_a.public_send(method, *args, &block) elsif arel.respond_to?(method) arel.public_send(method, *args, &block) else diff --git a/activerecord/lib/active_record/relation/finder_methods.rb b/activerecord/lib/active_record/relation/finder_methods.rb index 6020aa238f..3cbb12a09d 100644 --- a/activerecord/lib/active_record/relation/finder_methods.rb +++ b/activerecord/lib/active_record/relation/finder_methods.rb @@ -17,7 +17,7 @@ module ActiveRecord # Person.where("administrator = 1").order("created_on DESC").find(1) # # NOTE: The returned records may not be in the same order as the ids you - # provide since database rows are unordered. You'd need to provide an explicit <tt>order</tt> + # provide since database rows are unordered. You'd need to provide an explicit QueryMethods#order # option if you want the results are sorted. # # ==== Find with lock @@ -34,7 +34,7 @@ module ActiveRecord # person.save! # end # - # ==== Variations of +find+ + # ==== Variations of #find # # Person.where(name: 'Spartacus', rating: 4) # # returns a chainable list (which can be empty). @@ -48,7 +48,7 @@ module ActiveRecord # Person.where(name: 'Spartacus', rating: 4).first_or_create # # returns the first item or creates it and returns it. # - # ==== Alternatives for +find+ + # ==== Alternatives for #find # # Person.where(name: 'Spartacus', rating: 4).exists?(conditions = :none) # # returns a boolean indicating if any record with the given conditions exist. @@ -62,11 +62,8 @@ module ActiveRecord # Person.where(name: 'Spartacus', rating: 4).pluck(:field1, :field2) # # returns an Array of the required fields. def find(*args) - if block_given? - to_a.find(*args) { |*block_args| yield(*block_args) } - else - find_with_ids(*args) - end + return super if block_given? + find_with_ids(*args) end # Finds the first record matching the specified conditions. There @@ -83,12 +80,13 @@ module ActiveRecord nil end - # Like <tt>find_by</tt>, except that if no record is found, raises - # an <tt>ActiveRecord::RecordNotFound</tt> error. + # Like #find_by, except that if no record is found, raises + # an ActiveRecord::RecordNotFound error. def find_by!(arg, *args) where(arg, *args).take! rescue RangeError - raise RecordNotFound, "Couldn't find #{@klass.name} with an out of range value" + raise RecordNotFound.new("Couldn't find #{@klass.name} with an out of range value", + @klass.name) end # Gives a record (or N records if a parameter is supplied) without any implied @@ -102,8 +100,8 @@ module ActiveRecord limit ? limit(limit).to_a : find_take end - # Same as +take+ but raises <tt>ActiveRecord::RecordNotFound</tt> if no record - # is found. Note that <tt>take!</tt> accepts no arguments. + # Same as #take but raises ActiveRecord::RecordNotFound if no record + # is found. Note that #take! accepts no arguments. def take! take or raise RecordNotFound.new("Couldn't find #{@klass.name} with [#{arel.where_sql(@klass.arel_engine)}]") end @@ -119,14 +117,14 @@ module ActiveRecord # def first(limit = nil) if limit - find_nth_with_limit(offset_index, limit) + find_nth_with_limit_and_offset(0, limit, offset: offset_index) else - find_nth(0, offset_index) + find_nth 0 end end - # Same as +first+ but raises <tt>ActiveRecord::RecordNotFound</tt> if no record - # is found. Note that <tt>first!</tt> accepts no arguments. + # Same as #first but raises ActiveRecord::RecordNotFound if no record + # is found. Note that #first! accepts no arguments. def first! find_nth! 0 end @@ -158,8 +156,8 @@ module ActiveRecord end end - # Same as +last+ but raises <tt>ActiveRecord::RecordNotFound</tt> if no record - # is found. Note that <tt>last!</tt> accepts no arguments. + # Same as #last but raises ActiveRecord::RecordNotFound if no record + # is found. Note that #last! accepts no arguments. def last! last or raise RecordNotFound.new("Couldn't find #{@klass.name} with [#{arel.where_sql(@klass.arel_engine)}]") end @@ -171,10 +169,10 @@ module ActiveRecord # Person.offset(3).second # returns the second object from OFFSET 3 (which is OFFSET 4) # Person.where(["user_name = :u", { u: user_name }]).second def second - find_nth(1, offset_index) + find_nth 1 end - # Same as +second+ but raises <tt>ActiveRecord::RecordNotFound</tt> if no record + # Same as #second but raises ActiveRecord::RecordNotFound if no record # is found. def second! find_nth! 1 @@ -187,10 +185,10 @@ module ActiveRecord # Person.offset(3).third # returns the third object from OFFSET 3 (which is OFFSET 5) # Person.where(["user_name = :u", { u: user_name }]).third def third - find_nth(2, offset_index) + find_nth 2 end - # Same as +third+ but raises <tt>ActiveRecord::RecordNotFound</tt> if no record + # Same as #third but raises ActiveRecord::RecordNotFound if no record # is found. def third! find_nth! 2 @@ -203,10 +201,10 @@ module ActiveRecord # Person.offset(3).fourth # returns the fourth object from OFFSET 3 (which is OFFSET 6) # Person.where(["user_name = :u", { u: user_name }]).fourth def fourth - find_nth(3, offset_index) + find_nth 3 end - # Same as +fourth+ but raises <tt>ActiveRecord::RecordNotFound</tt> if no record + # Same as #fourth but raises ActiveRecord::RecordNotFound if no record # is found. def fourth! find_nth! 3 @@ -219,10 +217,10 @@ module ActiveRecord # Person.offset(3).fifth # returns the fifth object from OFFSET 3 (which is OFFSET 7) # Person.where(["user_name = :u", { u: user_name }]).fifth def fifth - find_nth(4, offset_index) + find_nth 4 end - # Same as +fifth+ but raises <tt>ActiveRecord::RecordNotFound</tt> if no record + # Same as #fifth but raises ActiveRecord::RecordNotFound if no record # is found. def fifth! find_nth! 4 @@ -235,17 +233,17 @@ module ActiveRecord # Person.offset(3).forty_two # returns the forty-second object from OFFSET 3 (which is OFFSET 44) # Person.where(["user_name = :u", { u: user_name }]).forty_two def forty_two - find_nth(41, offset_index) + find_nth 41 end - # Same as +forty_two+ but raises <tt>ActiveRecord::RecordNotFound</tt> if no record + # Same as #forty_two but raises ActiveRecord::RecordNotFound if no record # is found. def forty_two! find_nth! 41 end - # Returns +true+ if a record exists in the table that matches the +id+ or - # conditions given, or +false+ otherwise. The argument can take six forms: + # Returns true if a record exists in the table that matches the +id+ or + # conditions given, or false otherwise. The argument can take six forms: # # * Integer - Finds the record with this primary key. # * String - Finds the record with a primary key corresponding to this @@ -258,7 +256,7 @@ module ActiveRecord # * No args - Returns +false+ if the table is empty, +true+ otherwise. # # For more information about specifying conditions as a hash or array, - # see the Conditions section in the introduction to <tt>ActiveRecord::Base</tt>. + # see the Conditions section in the introduction to ActiveRecord::Base. # # Note: You can't pass in a condition as a string (like <tt>name = # 'Jamie'</tt>), since it would be sanitized and then queried against @@ -300,7 +298,7 @@ module ActiveRecord end # This method is called whenever no records are found with either a single - # id or multiple ids and raises a +ActiveRecord::RecordNotFound+ exception. + # id or multiple ids and raises a ActiveRecord::RecordNotFound exception. # # The error message is different depending on whether a single id or # multiple ids are provided. If multiple ids are provided, then the number @@ -444,6 +442,8 @@ module ActiveRecord end def find_some(ids) + return find_some_ordered(ids) unless order_values.present? + result = where(primary_key => ids).to_a expected_size = @@ -465,6 +465,21 @@ module ActiveRecord end end + def find_some_ordered(ids) + ids = ids.slice(offset_value || 0, limit_value || ids.size) || [] + + result = except(:limit, :offset).where(primary_key => ids).to_a + + if result.size == ids.size + pk_type = @klass.type_for_attribute(primary_key) + + records_by_id = result.index_by(&:id) + ids.map { |id| records_by_id.fetch(pk_type.cast(id)) } + else + raise_record_not_found_exception!(ids, result.size, ids.size) + end + end + def find_take if loaded? @records.first @@ -473,27 +488,39 @@ module ActiveRecord end end - def find_nth(index, offset) + def find_nth(index, offset = nil) if loaded? @records[index] else - offset += index - @offsets[offset] ||= find_nth_with_limit(offset, 1).first + # TODO: once the offset argument is removed we rely on offset_index + # within find_nth_with_limit, rather than pass it in via + # find_nth_with_limit_and_offset + if offset + ActiveSupport::Deprecation.warn(<<-MSG.squish) + Passing an offset argument to find_nth is deprecated, + please use Relation#offset instead. + MSG + else + offset = offset_index + end + @offsets[offset + index] ||= find_nth_with_limit_and_offset(index, 1, offset: offset).first end end def find_nth!(index) - find_nth(index, offset_index) or raise RecordNotFound.new("Couldn't find #{@klass.name} with [#{arel.where_sql(@klass.arel_engine)}]") + find_nth(index) or raise RecordNotFound.new("Couldn't find #{@klass.name} with [#{arel.where_sql(@klass.arel_engine)}]") end - def find_nth_with_limit(offset, limit) + def find_nth_with_limit(index, limit) + # TODO: once the offset argument is removed from find_nth, + # find_nth_with_limit_and_offset can be merged into this method relation = if order_values.empty? && primary_key order(arel_table[primary_key].asc) else self end - relation = relation.offset(offset) unless offset.zero? + relation = relation.offset(index) unless index.zero? relation.limit(limit).to_a end @@ -509,5 +536,16 @@ module ActiveRecord end end end + + private + + def find_nth_with_limit_and_offset(index, limit, offset:) # :nodoc: + if loaded? + @records[index, limit] + else + index += offset + find_nth_with_limit(index, limit) + end + end end end diff --git a/activerecord/lib/active_record/relation/from_clause.rb b/activerecord/lib/active_record/relation/from_clause.rb index a93952fa30..8945cb0cc5 100644 --- a/activerecord/lib/active_record/relation/from_clause.rb +++ b/activerecord/lib/active_record/relation/from_clause.rb @@ -1,6 +1,6 @@ module ActiveRecord class Relation - class FromClause + class FromClause # :nodoc: attr_reader :value, :name def initialize(value, name) @@ -25,7 +25,7 @@ module ActiveRecord end def self.empty - new(nil, nil) + @empty ||= new(nil, nil) end end end diff --git a/activerecord/lib/active_record/relation/merger.rb b/activerecord/lib/active_record/relation/merger.rb index c3054f1fe9..396638d74d 100644 --- a/activerecord/lib/active_record/relation/merger.rb +++ b/activerecord/lib/active_record/relation/merger.rb @@ -50,7 +50,7 @@ module ActiveRecord NORMAL_VALUES = Relation::VALUE_METHODS - Relation::CLAUSE_METHODS - - [:joins, :order, :reverse_order, :lock, :create_with, :reordering] # :nodoc: + [:includes, :preload, :joins, :order, :reverse_order, :lock, :create_with, :reordering] # :nodoc: def normal_values NORMAL_VALUES @@ -75,6 +75,7 @@ module ActiveRecord merge_multi_values merge_single_values merge_clauses + merge_preloads merge_joins relation @@ -82,6 +83,27 @@ module ActiveRecord private + def merge_preloads + return if other.preload_values.empty? && other.includes_values.empty? + + if other.klass == relation.klass + relation.preload!(*other.preload_values) unless other.preload_values.empty? + relation.includes!(other.includes_values) unless other.includes_values.empty? + else + reflection = relation.klass.reflect_on_all_associations.find do |r| + r.class_name == other.klass.name + end || return + + unless other.preload_values.empty? + relation.preload! reflection.name => other.preload_values + end + + unless other.includes_values.empty? + relation.includes! reflection.name => other.includes_values + end + end + end + def merge_joins return if other.joins_values.blank? @@ -119,6 +141,9 @@ module ActiveRecord end def merge_single_values + if relation.from_clause.empty? + relation.from_clause = other.from_clause + end relation.lock_value ||= other.lock_value unless other.create_with_value.blank? @@ -126,11 +151,15 @@ module ActiveRecord end end + CLAUSE_METHOD_NAMES = CLAUSE_METHODS.map do |name| + ["#{name}_clause", "#{name}_clause="] + end + def merge_clauses - CLAUSE_METHODS.each do |name| - clause = relation.send("#{name}_clause") - other_clause = other.send("#{name}_clause") - relation.send("#{name}_clause=", clause.merge(other_clause)) + CLAUSE_METHOD_NAMES.each do |(reader, writer)| + clause = relation.send(reader) + other_clause = other.send(reader) + relation.send(writer, clause.merge(other_clause)) end end end diff --git a/activerecord/lib/active_record/relation/predicate_builder.rb b/activerecord/lib/active_record/relation/predicate_builder.rb index 43e9afe853..39e7b42629 100644 --- a/activerecord/lib/active_record/relation/predicate_builder.rb +++ b/activerecord/lib/active_record/relation/predicate_builder.rb @@ -24,12 +24,12 @@ module ActiveRecord end def build_from_hash(attributes) - attributes = convert_dot_notation_to_hash(attributes.stringify_keys) + attributes = convert_dot_notation_to_hash(attributes) expand_from_hash(attributes) end def create_binds(attributes) - attributes = convert_dot_notation_to_hash(attributes.stringify_keys) + attributes = convert_dot_notation_to_hash(attributes) create_binds_for_hash(attributes) end @@ -52,7 +52,7 @@ module ActiveRecord key else key = key.to_s - key.split('.').first if key.include?('.') + key.split('.'.freeze).first if key.include?('.'.freeze) end end.compact end @@ -67,7 +67,7 @@ module ActiveRecord # Arel::Nodes::And.new([range.start, range.end]) # ) # end - # ActiveRecord::PredicateBuilder.register_handler(MyCustomDateRange, handler) + # ActiveRecord::PredicateBuilder.new("users").register_handler(MyCustomDateRange, handler) def register_handler(klass, handler) @handlers.unshift([klass, handler]) end @@ -123,10 +123,10 @@ module ActiveRecord end def convert_dot_notation_to_hash(attributes) - dot_notation = attributes.keys.select { |s| s.include?(".") } + dot_notation = attributes.keys.select { |s| s.include?(".".freeze) } dot_notation.each do |key| - table_name, column_name = key.split(".") + table_name, column_name = key.split(".".freeze) value = attributes.delete(key) attributes[table_name] ||= {} diff --git a/activerecord/lib/active_record/relation/predicate_builder/association_query_handler.rb b/activerecord/lib/active_record/relation/predicate_builder/association_query_handler.rb index 159889d3b8..e81be63cd3 100644 --- a/activerecord/lib/active_record/relation/predicate_builder/association_query_handler.rb +++ b/activerecord/lib/active_record/relation/predicate_builder/association_query_handler.rb @@ -10,10 +10,10 @@ module ActiveRecord table = value.associated_table if value.base_class - queries[table.association_foreign_type] = value.base_class.name + queries[table.association_foreign_type.to_s] = value.base_class.name end - queries[table.association_foreign_key] = value.ids + queries[table.association_foreign_key.to_s] = value.ids predicate_builder.build_from_hash(queries) end diff --git a/activerecord/lib/active_record/relation/query_attribute.rb b/activerecord/lib/active_record/relation/query_attribute.rb index e69319b4de..7ba964e802 100644 --- a/activerecord/lib/active_record/relation/query_attribute.rb +++ b/activerecord/lib/active_record/relation/query_attribute.rb @@ -2,7 +2,7 @@ require 'active_record/attribute' module ActiveRecord class Relation - class QueryAttribute < Attribute + class QueryAttribute < Attribute # :nodoc: def type_cast(value) value end diff --git a/activerecord/lib/active_record/relation/query_methods.rb b/activerecord/lib/active_record/relation/query_methods.rb index 69ce5cdc2a..716b1e8505 100644 --- a/activerecord/lib/active_record/relation/query_methods.rb +++ b/activerecord/lib/active_record/relation/query_methods.rb @@ -14,6 +14,8 @@ module ActiveRecord # WhereChain objects act as placeholder for queries in which #where does not have any parameter. # In this case, #where must be chained with #not to return a new relation. class WhereChain + include ActiveModel::ForbiddenAttributesProtection + def initialize(scope) @scope = scope end @@ -21,7 +23,7 @@ module ActiveRecord # Returns a new relation expressing WHERE + NOT condition according to # the conditions in the arguments. # - # +not+ accepts conditions as a string, array, or hash. See #where for + # #not accepts conditions as a string, array, or hash. See QueryMethods#where for # more details on each format. # # User.where.not("name = 'Jon'") @@ -42,6 +44,8 @@ module ActiveRecord # User.where.not(name: "Jon", role: "admin") # # SELECT * FROM users WHERE name != 'Jon' AND role != 'admin' def not(opts, *rest) + opts = sanitize_forbidden_attributes(opts) + where_clause = @scope.send(:where_clause_factory).build(opts, rest) @scope.references!(PredicateBuilder.references(opts)) if Hash === opts @@ -50,16 +54,17 @@ module ActiveRecord end end + FROZEN_EMPTY_ARRAY = [].freeze Relation::MULTI_VALUE_METHODS.each do |name| class_eval <<-CODE, __FILE__, __LINE__ + 1 - def #{name}_values # def select_values - @values[:#{name}] || [] # @values[:select] || [] - end # end - # - def #{name}_values=(values) # def select_values=(values) - assert_mutability! # assert_mutability! - @values[:#{name}] = values # @values[:select] = values - end # end + def #{name}_values + @values[:#{name}] || FROZEN_EMPTY_ARRAY + end + + def #{name}_values=(values) + assert_mutability! + @values[:#{name}] = values + end CODE end @@ -94,11 +99,27 @@ module ActiveRecord end def bound_attributes - from_clause.binds + arel.bind_values + where_clause.binds + having_clause.binds + result = from_clause.binds + arel.bind_values + where_clause.binds + having_clause.binds + if limit_value && !string_containing_comma?(limit_value) + result << Attribute.with_cast_value( + "LIMIT".freeze, + connection.sanitize_limit(limit_value), + Type::Value.new, + ) + end + if offset_value + result << Attribute.with_cast_value( + "OFFSET".freeze, + offset_value.to_i, + Type::Value.new, + ) + end + result end + FROZEN_EMPTY_HASH = {}.freeze def create_with_value # :nodoc: - @values[:create_with] || {} + @values[:create_with] || FROZEN_EMPTY_HASH end alias extensions extending_values @@ -113,7 +134,7 @@ module ActiveRecord # # allows you to access the +address+ attribute of the +User+ model without # firing an additional query. This will often result in a - # performance improvement over a simple +join+. + # performance improvement over a simple join. # # You can also specify multiple relationships, like this: # @@ -134,7 +155,7 @@ module ActiveRecord # # User.includes(:posts).where('posts.name = ?', 'example').references(:posts) # - # Note that +includes+ works with association names while +references+ needs + # Note that #includes works with association names while #references needs # the actual table name. def includes(*args) check_if_method_has_arguments!(:includes, args) @@ -152,9 +173,9 @@ module ActiveRecord # Forces eager loading by performing a LEFT OUTER JOIN on +args+: # # User.eager_load(:posts) - # => SELECT "users"."id" AS t0_r0, "users"."name" AS t0_r1, ... - # FROM "users" LEFT OUTER JOIN "posts" ON "posts"."user_id" = - # "users"."id" + # # SELECT "users"."id" AS t0_r0, "users"."name" AS t0_r1, ... + # # FROM "users" LEFT OUTER JOIN "posts" ON "posts"."user_id" = + # # "users"."id" def eager_load(*args) check_if_method_has_arguments!(:eager_load, args) spawn.eager_load!(*args) @@ -165,10 +186,10 @@ module ActiveRecord self end - # Allows preloading of +args+, in the same way that +includes+ does: + # Allows preloading of +args+, in the same way that #includes does: # # User.preload(:posts) - # => SELECT "posts".* FROM "posts" WHERE "posts"."user_id" IN (1, 2, 3) + # # SELECT "posts".* FROM "posts" WHERE "posts"."user_id" IN (1, 2, 3) def preload(*args) check_if_method_has_arguments!(:preload, args) spawn.preload!(*args) @@ -181,14 +202,14 @@ module ActiveRecord # Use to indicate that the given +table_names+ are referenced by an SQL string, # and should therefore be JOINed in any query rather than loaded separately. - # This method only works in conjunction with +includes+. + # This method only works in conjunction with #includes. # See #includes for more details. # # User.includes(:posts).where("posts.name = 'foo'") - # # => Doesn't JOIN the posts table, resulting in an error. + # # Doesn't JOIN the posts table, resulting in an error. # # User.includes(:posts).where("posts.name = 'foo'").references(:posts) - # # => Query now knows the string references posts, so adds a JOIN + # # Query now knows the string references posts, so adds a JOIN def references(*table_names) check_if_method_has_arguments!(:references, table_names) spawn.references!(*table_names) @@ -204,12 +225,12 @@ module ActiveRecord # Works in two unique ways. # - # First: takes a block so it can be used just like Array#select. + # First: takes a block so it can be used just like +Array#select+. # # Model.all.select { |m| m.field == value } # # This will build an array of objects from the database for the scope, - # converting them into an array and iterating through them using Array#select. + # converting them into an array and iterating through them using +Array#select+. # # Second: Modifies the SELECT statement for the query so that only certain # fields are retrieved: @@ -237,23 +258,20 @@ module ActiveRecord # # => "value" # # Accessing attributes of an object that do not have fields retrieved by a select - # except +id+ will throw <tt>ActiveModel::MissingAttributeError</tt>: + # except +id+ will throw ActiveModel::MissingAttributeError: # # Model.select(:field).first.other_field # # => ActiveModel::MissingAttributeError: missing attribute: other_field def select(*fields) - if block_given? - to_a.select { |*block_args| yield(*block_args) } - else - raise ArgumentError, 'Call this with at least one field' if fields.empty? - spawn._select!(*fields) - end + return super if block_given? + raise ArgumentError, 'Call this with at least one field' if fields.empty? + spawn._select!(*fields) end def _select!(*fields) # :nodoc: fields.flatten! fields.map! do |field| - klass.attribute_alias?(field) ? klass.attribute_alias(field) : field + klass.attribute_alias?(field) ? klass.attribute_alias(field).to_sym : field end self.select_values += fields self @@ -262,22 +280,23 @@ module ActiveRecord # Allows to specify a group attribute: # # User.group(:name) - # => SELECT "users".* FROM "users" GROUP BY name + # # SELECT "users".* FROM "users" GROUP BY name # # Returns an array with distinct records based on the +group+ attribute: # # User.select([:id, :name]) - # => [#<User id: 1, name: "Oscar">, #<User id: 2, name: "Oscar">, #<User id: 3, name: "Foo"> + # # => [#<User id: 1, name: "Oscar">, #<User id: 2, name: "Oscar">, #<User id: 3, name: "Foo">] # # User.group(:name) - # => [#<User id: 3, name: "Foo", ...>, #<User id: 2, name: "Oscar", ...>] + # # => [#<User id: 3, name: "Foo", ...>, #<User id: 2, name: "Oscar", ...>] # # User.group('name AS grouped_name, age') - # => [#<User id: 3, name: "Foo", age: 21, ...>, #<User id: 2, name: "Oscar", age: 21, ...>, #<User id: 5, name: "Foo", age: 23, ...>] + # # => [#<User id: 3, name: "Foo", age: 21, ...>, #<User id: 2, name: "Oscar", age: 21, ...>, #<User id: 5, name: "Foo", age: 23, ...>] # # Passing in an array of attributes to group by is also supported. + # # User.select([:id, :first_name]).group(:id, :first_name).first(3) - # => [#<User id: 1, first_name: "Bill">, #<User id: 2, first_name: "Earl">, #<User id: 3, first_name: "Beto">] + # # => [#<User id: 1, first_name: "Bill">, #<User id: 2, first_name: "Earl">, #<User id: 3, first_name: "Beto">] def group(*args) check_if_method_has_arguments!(:group, args) spawn.group!(*args) @@ -293,22 +312,22 @@ module ActiveRecord # Allows to specify an order attribute: # # User.order(:name) - # => SELECT "users".* FROM "users" ORDER BY "users"."name" ASC + # # SELECT "users".* FROM "users" ORDER BY "users"."name" ASC # # User.order(email: :desc) - # => SELECT "users".* FROM "users" ORDER BY "users"."email" DESC + # # SELECT "users".* FROM "users" ORDER BY "users"."email" DESC # # User.order(:name, email: :desc) - # => SELECT "users".* FROM "users" ORDER BY "users"."name" ASC, "users"."email" DESC + # # SELECT "users".* FROM "users" ORDER BY "users"."name" ASC, "users"."email" DESC # # User.order('name') - # => SELECT "users".* FROM "users" ORDER BY name + # # SELECT "users".* FROM "users" ORDER BY name # # User.order('name DESC') - # => SELECT "users".* FROM "users" ORDER BY name DESC + # # SELECT "users".* FROM "users" ORDER BY name DESC # # User.order('name DESC, email') - # => SELECT "users".* FROM "users" ORDER BY name DESC, email + # # SELECT "users".* FROM "users" ORDER BY name DESC, email def order(*args) check_if_method_has_arguments!(:order, args) spawn.order!(*args) @@ -360,15 +379,15 @@ module ActiveRecord # User.order('email DESC').select('id').where(name: "John") # .unscope(:order, :select, :where) == User.all # - # One can additionally pass a hash as an argument to unscope specific :where values. + # One can additionally pass a hash as an argument to unscope specific +:where+ values. # This is done by passing a hash with a single key-value pair. The key should be - # :where and the value should be the where value to unscope. For example: + # +:where+ and the value should be the where value to unscope. For example: # # User.where(name: "John", active: true).unscope(where: :name) # == User.where(active: true) # - # This method is similar to <tt>except</tt>, but unlike - # <tt>except</tt>, it persists across merges: + # This method is similar to #except, but unlike + # #except, it persists across merges: # # User.order('email').merge(User.except(:order)) # == User.order('email') @@ -378,7 +397,7 @@ module ActiveRecord # # This means it can be used in association definitions: # - # has_many :comments, -> { unscope where: :trashed } + # has_many :comments, -> { unscope(where: :trashed) } # def unscope(*args) check_if_method_has_arguments!(:unscope, args) @@ -410,15 +429,35 @@ module ActiveRecord self end - # Performs a joins on +args+: + # Performs a joins on +args+. The given symbol(s) should match the name of + # the association(s). # # User.joins(:posts) - # => SELECT "users".* FROM "users" INNER JOIN "posts" ON "posts"."user_id" = "users"."id" + # # SELECT "users".* + # # FROM "users" + # # INNER JOIN "posts" ON "posts"."user_id" = "users"."id" + # + # Multiple joins: + # + # User.joins(:posts, :account) + # # SELECT "users".* + # # FROM "users" + # # INNER JOIN "posts" ON "posts"."user_id" = "users"."id" + # # INNER JOIN "accounts" ON "accounts"."id" = "users"."account_id" + # + # Nested joins: + # + # User.joins(posts: [:comments]) + # # SELECT "users".* + # # FROM "users" + # # INNER JOIN "posts" ON "posts"."user_id" = "users"."id" + # # INNER JOIN "comments" "comments_posts" + # # ON "comments_posts"."post_id" = "posts"."id" # # You can use strings in order to customize your joins: # # User.joins("LEFT JOIN bookmarks ON bookmarks.bookmarkable_type = 'Post' AND bookmarks.user_id = users.id") - # => SELECT "users".* FROM "users" LEFT JOIN bookmarks ON bookmarks.bookmarkable_type = 'Post' AND bookmarks.user_id = users.id + # # SELECT "users".* FROM "users" LEFT JOIN bookmarks ON bookmarks.bookmarkable_type = 'Post' AND bookmarks.user_id = users.id def joins(*args) check_if_method_has_arguments!(:joins, args) spawn.joins!(*args) @@ -431,6 +470,27 @@ module ActiveRecord self end + # Performs a left outer joins on +args+: + # + # User.left_outer_joins(:posts) + # => SELECT "users".* FROM "users" LEFT OUTER JOIN "posts" ON "posts"."user_id" = "users"."id" + # + def left_outer_joins(*args) + check_if_method_has_arguments!(:left_outer_joins, args) + + args.compact! + args.flatten! + + spawn.left_outer_joins!(*args) + end + alias :left_joins :left_outer_joins + + def left_outer_joins!(*args) # :nodoc: + self.left_outer_joins_values += args + self + end + alias :left_joins! :left_outer_joins! + # Returns a new relation, which is the result of filtering the current relation # according to the conditions in the arguments. # @@ -474,7 +534,7 @@ module ActiveRecord # than the previous methods; you are responsible for ensuring that the values in the template # are properly quoted. The values are passed to the connector for quoting, but the caller # is responsible for ensuring they are enclosed in quotes in the resulting SQL. After quoting, - # the values are inserted using the same escapes as the Ruby core method <tt>Kernel::sprintf</tt>. + # the values are inserted using the same escapes as the Ruby core method +Kernel::sprintf+. # # User.where(["name = '%s' and email = '%s'", "Joe", "joe@example.com"]) # # SELECT * FROM users WHERE name = 'Joe' AND email = 'joe@example.com'; @@ -551,7 +611,7 @@ module ActiveRecord # If the condition is any blank-ish object, then #where is a no-op and returns # the current relation. def where(opts = :chain, *rest) - if opts == :chain + if :chain == opts WhereChain.new(spawn) elsif opts.blank? self @@ -561,23 +621,25 @@ module ActiveRecord end def where!(opts, *rest) # :nodoc: - if Hash === opts - opts = sanitize_forbidden_attributes(opts) - references!(PredicateBuilder.references(opts)) - end - + opts = sanitize_forbidden_attributes(opts) + references!(PredicateBuilder.references(opts)) if Hash === opts self.where_clause += where_clause_factory.build(opts, rest) self end # Allows you to change a previously set where condition for a given attribute, instead of appending to that condition. # - # Post.where(trashed: true).where(trashed: false) # => WHERE `trashed` = 1 AND `trashed` = 0 - # Post.where(trashed: true).rewhere(trashed: false) # => WHERE `trashed` = 0 - # Post.where(active: true).where(trashed: true).rewhere(trashed: false) # => WHERE `active` = 1 AND `trashed` = 0 + # Post.where(trashed: true).where(trashed: false) + # # WHERE `trashed` = 1 AND `trashed` = 0 # - # This is short-hand for unscope(where: conditions.keys).where(conditions). Note that unlike reorder, we're only unscoping - # the named conditions -- not the entire where statement. + # Post.where(trashed: true).rewhere(trashed: false) + # # WHERE `trashed` = 0 + # + # Post.where(active: true).where(trashed: true).rewhere(trashed: false) + # # WHERE `active` = 1 AND `trashed` = 0 + # + # This is short-hand for <tt>unscope(where: conditions.keys).where(conditions)</tt>. + # Note that unlike reorder, we're only unscoping the named conditions -- not the entire where statement. def rewhere(conditions) unscope(where: conditions.keys).where(conditions) end @@ -586,19 +648,21 @@ module ActiveRecord # argument. # # The two relations must be structurally compatible: they must be scoping the same model, and - # they must differ only by +where+ (if no +group+ has been defined) or +having+ (if a +group+ is - # present). Neither relation may have a +limit+, +offset+, or +uniq+ set. + # they must differ only by #where (if no #group has been defined) or #having (if a #group is + # present). Neither relation may have a #limit, #offset, or #distinct set. # - # Post.where("id = 1").or(Post.where("id = 2")) - # # SELECT `posts`.* FROM `posts` WHERE (('id = 1' OR 'id = 2')) + # Post.where("id = 1").or(Post.where("author_id = 3")) + # # SELECT `posts`.* FROM `posts` WHERE (('id = 1' OR 'author_id = 3')) # def or(other) spawn.or!(other) end def or!(other) # :nodoc: - unless structurally_compatible_for_or?(other) - raise ArgumentError, 'Relation passed to #or must be structurally compatible' + incompatible_values = structurally_incompatible_values_for_or(other) + + unless incompatible_values.empty? + raise ArgumentError, "Relation passed to #or must be structurally compatible. Incompatible values: #{incompatible_values}" end self.where_clause = self.where_clause.or(other.where_clause) @@ -607,12 +671,6 @@ module ActiveRecord self end - private def structurally_compatible_for_or?(other) # :nodoc: - Relation::SINGLE_VALUE_METHODS.all? { |m| send("#{m}_value") == other.send("#{m}_value") } && - (Relation::MULTI_VALUE_METHODS - [:extending]).all? { |m| send("#{m}_values") == other.send("#{m}_values") } && - (Relation::CLAUSE_METHODS - [:having, :where]).all? { |m| send("#{m}_clause") != other.send("#{m}_clause") } - end - # Allows to specify a HAVING clause. Note that you can't use HAVING # without also specifying a GROUP clause. # @@ -622,6 +680,7 @@ module ActiveRecord end def having!(opts, *rest) # :nodoc: + opts = sanitize_forbidden_attributes(opts) references!(PredicateBuilder.references(opts)) if Hash === opts self.having_clause += having_clause_factory.build(opts, rest) @@ -638,6 +697,13 @@ module ActiveRecord end def limit!(value) # :nodoc: + if string_containing_comma?(value) + # Remove `string_containing_comma?` when removing this deprecation + ActiveSupport::Deprecation.warn(<<-WARNING.squish) + Passing a string to limit in the form "1,2" is deprecated and will be + removed in Rails 5.1. Please call `offset` explicitly instead. + WARNING + end self.limit_value = value self end @@ -659,7 +725,7 @@ module ActiveRecord end # Specifies locking settings (default to +true+). For more information - # on locking, please see +ActiveRecord::Locking+. + # on locking, please see ActiveRecord::Locking. def lock(locks = true) spawn.lock!(locks) end @@ -690,7 +756,7 @@ module ActiveRecord # For example: # # @posts = current_user.visible_posts.where(name: params[:name]) - # # => the visible_posts method is expected to return a chainable Relation + # # the visible_posts method is expected to return a chainable Relation # # def visible_posts # case role @@ -716,7 +782,7 @@ module ActiveRecord # # users = User.readonly # users.first.save - # => ActiveRecord::ReadOnlyRecord: ActiveRecord::ReadOnlyRecord + # => ActiveRecord::ReadOnlyRecord: User is marked as readonly def readonly(value = true) spawn.readonly!(value) end @@ -735,7 +801,7 @@ module ActiveRecord # users = users.create_with(name: 'DHH') # users.new.name # => 'DHH' # - # You can pass +nil+ to +create_with+ to reset attributes: + # You can pass +nil+ to #create_with to reset attributes: # # users = users.create_with(nil) # users.new.name # => 'Oscar' @@ -757,15 +823,15 @@ module ActiveRecord # Specifies table from which the records will be fetched. For example: # # Topic.select('title').from('posts') - # # => SELECT title FROM posts + # # SELECT title FROM posts # # Can accept other relation objects. For example: # # Topic.select('title').from(Topic.approved) - # # => SELECT title FROM (SELECT * FROM topics WHERE approved = 't') subquery + # # SELECT title FROM (SELECT * FROM topics WHERE approved = 't') subquery # # Topic.select('a.title').from(Topic.approved, :a) - # # => SELECT a.title FROM (SELECT * FROM topics WHERE approved = 't') a + # # SELECT a.title FROM (SELECT * FROM topics WHERE approved = 't') a # def from(value, subquery_name = nil) spawn.from!(value, subquery_name) @@ -779,17 +845,18 @@ module ActiveRecord # Specifies whether the records should be unique or not. For example: # # User.select(:name) - # # => Might return two records with the same name + # # Might return two records with the same name # # User.select(:name).distinct - # # => Returns 1 record per distinct name + # # Returns 1 record per distinct name # # User.select(:name).distinct.distinct(false) - # # => You can also remove the uniqueness + # # You can also remove the uniqueness def distinct(value = true) spawn.distinct!(value) end alias uniq distinct + deprecate uniq: :distinct # Like #distinct, but modifies relation in place. def distinct!(value = true) # :nodoc: @@ -797,6 +864,7 @@ module ActiveRecord self end alias uniq! distinct! + deprecate uniq!: :distinct! # Used to extend a scope with additional methods, either through # a module or through a block provided. @@ -882,11 +950,18 @@ module ActiveRecord arel = Arel::SelectManager.new(table) build_joins(arel, joins_values.flatten) unless joins_values.empty? + build_left_outer_joins(arel, left_outer_joins_values.flatten) unless left_outer_joins_values.empty? arel.where(where_clause.ast) unless where_clause.empty? arel.having(having_clause.ast) unless having_clause.empty? - arel.take(connection.sanitize_limit(limit_value)) if limit_value - arel.skip(offset_value.to_i) if offset_value + if limit_value + if string_containing_comma?(limit_value) + arel.take(connection.sanitize_limit(limit_value)) + else + arel.take(Arel::Nodes::BindParam.new) + end + end + arel.skip(Arel::Nodes::BindParam.new) if offset_value arel.group(*arel_columns(group_values.uniq.reject(&:blank?))) unless group_values.empty? build_order(arel) @@ -941,6 +1016,19 @@ module ActiveRecord end end + def build_left_outer_joins(manager, outer_joins) + buckets = outer_joins.group_by do |join| + case join + when Hash, Symbol, Array + :association_join + else + raise ArgumentError, 'only Hash, Symbol and Array are allowed' + end + end + + build_join_query(manager, buckets, Arel::Nodes::OuterJoin) + end + def build_joins(manager, joins) buckets = joins.group_by do |join| case join @@ -956,6 +1044,11 @@ module ActiveRecord raise 'unknown class: %s' % join.class.name end end + + build_join_query(manager, buckets, Arel::Nodes::InnerJoin) + end + + def build_join_query(manager, buckets, join_type) buckets.default = [] association_joins = buckets[:association_join] @@ -971,7 +1064,7 @@ module ActiveRecord join_list ) - join_infos = join_dependency.join_constraints stashed_association_joins + join_infos = join_dependency.join_constraints stashed_association_joins, join_type join_infos.each do |info| info.joins.each { |join| manager.from(join) } @@ -999,15 +1092,13 @@ module ActiveRecord end def arel_columns(columns) - if from_clause.value - columns - else - columns.map do |field| - if (Symbol === field || String === field) && columns_hash.key?(field.to_s) - arel_table[field] - else - field - end + columns.map do |field| + if (Symbol === field || String === field) && columns_hash.key?(field.to_s) && !from_clause.value + arel_table[field] + elsif Symbol === field + connection.quote_table_name(field.to_s) + else + field end end end @@ -1051,6 +1142,9 @@ module ActiveRecord end def preprocess_order_args(order_args) + order_args.map! do |arg| + klass.send(:sanitize_sql_for_order, arg) + end order_args.flatten! validate_order_args(order_args) @@ -1081,8 +1175,8 @@ module ActiveRecord # # Example: # - # Post.references() # => raises an error - # Post.references([]) # => does not raise an error + # Post.references() # raises an error + # Post.references([]) # does not raise an error # # This particular method should be called with a method_name and the args # passed into that method as an input. For example: @@ -1097,6 +1191,12 @@ module ActiveRecord end end + def structurally_incompatible_values_for_or(other) + Relation::SINGLE_VALUE_METHODS.reject { |m| send("#{m}_value") == other.send("#{m}_value") } + + (Relation::MULTI_VALUE_METHODS - [:extending]).reject { |m| send("#{m}_values") == other.send("#{m}_values") } + + (Relation::CLAUSE_METHODS - [:having, :where]).reject { |m| send("#{m}_clause") == other.send("#{m}_clause") } + end + def new_where_clause Relation::WhereClause.empty end @@ -1110,5 +1210,9 @@ module ActiveRecord def new_from_clause Relation::FromClause.empty end + + def string_containing_comma?(value) + ::String === value && value.include?(",") + end end end diff --git a/activerecord/lib/active_record/relation/record_fetch_warning.rb b/activerecord/lib/active_record/relation/record_fetch_warning.rb index 14e1bf89fa..dbd08811fa 100644 --- a/activerecord/lib/active_record/relation/record_fetch_warning.rb +++ b/activerecord/lib/active_record/relation/record_fetch_warning.rb @@ -23,23 +23,23 @@ module ActiveRecord end end - ActiveSupport::Notifications.subscribe("sql.active_record") do |*args| - payload = args.last - + # :stopdoc: + ActiveSupport::Notifications.subscribe("sql.active_record") do |*, payload| QueryRegistry.queries << payload[:sql] end + # :startdoc: class QueryRegistry # :nodoc: extend ActiveSupport::PerThreadRegistry - attr_accessor :queries + attr_reader :queries def initialize - reset + @queries = [] end def reset - @queries = [] + @queries.clear end end end diff --git a/activerecord/lib/active_record/relation/spawn_methods.rb b/activerecord/lib/active_record/relation/spawn_methods.rb index 70da37fa84..67d7f83cb4 100644 --- a/activerecord/lib/active_record/relation/spawn_methods.rb +++ b/activerecord/lib/active_record/relation/spawn_methods.rb @@ -10,8 +10,9 @@ module ActiveRecord clone end - # Merges in the conditions from <tt>other</tt>, if <tt>other</tt> is an <tt>ActiveRecord::Relation</tt>. + # Merges in the conditions from <tt>other</tt>, if <tt>other</tt> is an ActiveRecord::Relation. # Returns an array representing the intersection of the resulting records with <tt>other</tt>, if <tt>other</tt> is an array. + # # Post.where(published: true).joins(:comments).merge( Comment.where(spam: false) ) # # Performs a single join query with both where conditions. # @@ -37,11 +38,14 @@ module ActiveRecord end def merge!(other) # :nodoc: - if !other.is_a?(Relation) && other.respond_to?(:to_proc) + if other.is_a?(Hash) + Relation::HashMerger.new(self, other).merge + elsif other.is_a?(Relation) + Relation::Merger.new(self, other).merge + elsif other.respond_to?(:to_proc) instance_exec(&other) else - klass = other.is_a?(Hash) ? Relation::HashMerger : Relation::Merger - klass.new(self, other).merge + raise ArgumentError, "#{other.inspect} is not an ActiveRecord::Relation" end end diff --git a/activerecord/lib/active_record/relation/where_clause.rb b/activerecord/lib/active_record/relation/where_clause.rb index 1f000b3f0f..2c2d6cfa47 100644 --- a/activerecord/lib/active_record/relation/where_clause.rb +++ b/activerecord/lib/active_record/relation/where_clause.rb @@ -81,7 +81,7 @@ module ActiveRecord end def self.empty - new([], []) + @empty ||= new([], []) end protected diff --git a/activerecord/lib/active_record/relation/where_clause_factory.rb b/activerecord/lib/active_record/relation/where_clause_factory.rb index 0430922be3..dbf172a577 100644 --- a/activerecord/lib/active_record/relation/where_clause_factory.rb +++ b/activerecord/lib/active_record/relation/where_clause_factory.rb @@ -1,6 +1,6 @@ module ActiveRecord class Relation - class WhereClauseFactory + class WhereClauseFactory # :nodoc: def initialize(klass, predicate_builder) @klass = klass @predicate_builder = predicate_builder @@ -15,12 +15,16 @@ module ActiveRecord when Hash attributes = predicate_builder.resolve_column_aliases(opts) attributes = klass.send(:expand_hash_conditions_for_aggregates, attributes) + attributes.stringify_keys! attributes, binds = predicate_builder.create_binds(attributes) parts = predicate_builder.build_from_hash(attributes) - else + when Arel::Nodes::Node parts = [opts] + binds = other + else + raise ArgumentError, "Unsupported argument type: #{opts} (#{opts.class})" end WhereClause.new(parts, binds) diff --git a/activerecord/lib/active_record/result.rb b/activerecord/lib/active_record/result.rb index 500c478e65..8e6cd6c82f 100644 --- a/activerecord/lib/active_record/result.rb +++ b/activerecord/lib/active_record/result.rb @@ -1,7 +1,8 @@ module ActiveRecord ### - # This class encapsulates a Result returned from calling +exec_query+ on any - # database connection adapter. For example: + # This class encapsulates a result returned from calling + # {#exec_query}[rdoc-ref:ConnectionAdapters::DatabaseStatements#exec_query] + # on any database connection adapter. For example: # # result = ActiveRecord::Base.connection.exec_query('SELECT id, title, body FROM posts') # result # => #<ActiveRecord::Result:0xdeadbeef> diff --git a/activerecord/lib/active_record/runtime_registry.rb b/activerecord/lib/active_record/runtime_registry.rb index 9d605b826a..56e88bc661 100644 --- a/activerecord/lib/active_record/runtime_registry.rb +++ b/activerecord/lib/active_record/runtime_registry.rb @@ -7,7 +7,7 @@ module ActiveRecord # # returns the connection handler local to the current thread. # - # See the documentation of <tt>ActiveSupport::PerThreadRegistry</tt> + # See the documentation of ActiveSupport::PerThreadRegistry # for further details. class RuntimeRegistry # :nodoc: extend ActiveSupport::PerThreadRegistry diff --git a/activerecord/lib/active_record/sanitization.rb b/activerecord/lib/active_record/sanitization.rb index c2567311bd..2bfc5ff7ae 100644 --- a/activerecord/lib/active_record/sanitization.rb +++ b/activerecord/lib/active_record/sanitization.rb @@ -3,8 +3,9 @@ module ActiveRecord extend ActiveSupport::Concern module ClassMethods - # Used to sanitize objects before they're used in an SQL SELECT statement. Delegates to <tt>connection.quote</tt>. - def sanitize(object) #:nodoc: + # Used to sanitize objects before they're used in an SQL SELECT statement. + # Delegates to {connection.quote}[rdoc-ref:ConnectionAdapters::Quoting#quote]. + def sanitize(object) # :nodoc: connection.quote(object) end alias_method :quote_value, :sanitize @@ -13,9 +14,19 @@ module ActiveRecord # Accepts an array or string of SQL conditions and sanitizes # them into a valid SQL fragment for a WHERE clause. - # ["name='%s' and group_id='%s'", "foo'bar", 4] returns "name='foo''bar' and group_id='4'" - # "name='foo''bar' and group_id='4'" returns "name='foo''bar' and group_id='4'" - def sanitize_sql_for_conditions(condition, table_name = self.table_name) + # + # sanitize_sql_for_conditions(["name=? and group_id=?", "foo'bar", 4]) + # # => "name='foo''bar' and group_id=4" + # + # sanitize_sql_for_conditions(["name=:name and group_id=:group_id", name: "foo'bar", group_id: 4]) + # # => "name='foo''bar' and group_id='4'" + # + # sanitize_sql_for_conditions(["name='%s' and group_id='%s'", "foo'bar", 4]) + # # => "name='foo''bar' and group_id='4'" + # + # sanitize_sql_for_conditions("name='foo''bar' and group_id='4'") + # # => "name='foo''bar' and group_id='4'" + def sanitize_sql_for_conditions(condition) return nil if condition.blank? case condition @@ -28,7 +39,18 @@ module ActiveRecord # Accepts an array, hash, or string of SQL conditions and sanitizes # them into a valid SQL fragment for a SET clause. - # { name: nil, group_id: 4 } returns "name = NULL , group_id='4'" + # + # sanitize_sql_for_assignment(["name=? and group_id=?", nil, 4]) + # # => "name=NULL and group_id=4" + # + # sanitize_sql_for_assignment(["name=:name and group_id=:group_id", name: nil, group_id: 4]) + # # => "name=NULL and group_id=4" + # + # Post.send(:sanitize_sql_for_assignment, { name: nil, group_id: 4 }) + # # => "`posts`.`name` = NULL, `posts`.`group_id` = 4" + # + # sanitize_sql_for_assignment("name=NULL and group_id='4'") + # # => "name=NULL and group_id='4'" def sanitize_sql_for_assignment(assignments, default_table_name = self.table_name) case assignments when Array; sanitize_sql_array(assignments) @@ -37,17 +59,37 @@ module ActiveRecord end end + # Accepts an array, or string of SQL conditions and sanitizes + # them into a valid SQL fragment for a ORDER clause. + # + # sanitize_sql_for_order(["field(id, ?)", [1,3,2]]) + # # => "field(id, 1,3,2)" + # + # sanitize_sql_for_order("id ASC") + # # => "id ASC" + def sanitize_sql_for_order(condition) + if condition.is_a?(Array) && condition.first.to_s.include?('?') + sanitize_sql_array(condition) + else + condition + end + end + # Accepts a hash of SQL conditions and replaces those attributes - # that correspond to a +composed_of+ relationship with their expanded - # aggregate attribute values. + # that correspond to a {#composed_of}[rdoc-ref:Aggregations::ClassMethods#composed_of] + # relationship with their expanded aggregate attribute values. + # # Given: - # class Person < ActiveRecord::Base - # composed_of :address, class_name: "Address", - # mapping: [%w(address_street street), %w(address_city city)] - # end + # + # class Person < ActiveRecord::Base + # composed_of :address, class_name: "Address", + # mapping: [%w(address_street street), %w(address_city city)] + # end + # # Then: - # { address: Address.new("813 abc st.", "chicago") } - # # => { address_street: "813 abc st.", address_city: "chicago" } + # + # { address: Address.new("813 abc st.", "chicago") } + # # => { address_street: "813 abc st.", address_city: "chicago" } def expand_hash_conditions_for_aggregates(attrs) expanded_attrs = {} attrs.each do |attr, value| @@ -68,8 +110,9 @@ module ActiveRecord end # Sanitizes a hash of attribute/value pairs into SQL conditions for a SET clause. - # { status: nil, group_id: 1 } - # # => "status = NULL , group_id = 1" + # + # sanitize_sql_hash_for_assignment({ status: nil, group_id: 1 }, "posts") + # # => "`posts`.`status` = NULL, `posts`.`group_id` = 1" def sanitize_sql_hash_for_assignment(attrs, table) c = connection attrs.map do |attr, value| @@ -79,7 +122,19 @@ module ActiveRecord end # Sanitizes a +string+ so that it is safe to use within an SQL - # LIKE statement. This method uses +escape_character+ to escape all occurrences of "\", "_" and "%" + # LIKE statement. This method uses +escape_character+ to escape all occurrences of "\", "_" and "%". + # + # sanitize_sql_like("100%") + # # => "100\\%" + # + # sanitize_sql_like("snake_cased_string") + # # => "snake\\_cased\\_string" + # + # sanitize_sql_like("100%", "!") + # # => "100!%" + # + # sanitize_sql_like("snake_cased_string", "!") + # # => "snake!_cased!_string" def sanitize_sql_like(string, escape_character = "\\") pattern = Regexp.union(escape_character, "%", "_") string.gsub(pattern) { |x| [escape_character, x].join } @@ -87,7 +142,15 @@ module ActiveRecord # Accepts an array of conditions. The array has each value # sanitized and interpolated into the SQL statement. - # ["name='%s' and group_id='%s'", "foo'bar", 4] returns "name='foo''bar' and group_id='4'" + # + # sanitize_sql_array(["name=? and group_id=?", "foo'bar", 4]) + # # => "name='foo''bar' and group_id=4" + # + # sanitize_sql_array(["name=:name and group_id=:group_id", name: "foo'bar", group_id: 4]) + # # => "name='foo''bar' and group_id=4" + # + # sanitize_sql_array(["name='%s' and group_id='%s'", "foo'bar", 4]) + # # => "name='foo''bar' and group_id='4'" def sanitize_sql_array(ary) statement, *values = ary if values.first.is_a?(Hash) && statement =~ /:\w+/ @@ -101,7 +164,7 @@ module ActiveRecord end end - def replace_bind_variables(statement, values) #:nodoc: + def replace_bind_variables(statement, values) # :nodoc: raise_if_bind_arity_mismatch(statement, statement.count('?'), values.size) bound = values.dup c = connection @@ -110,7 +173,7 @@ module ActiveRecord end end - def replace_bind_variable(value, c = connection) #:nodoc: + def replace_bind_variable(value, c = connection) # :nodoc: if ActiveRecord::Relation === value value.to_sql else @@ -118,10 +181,10 @@ module ActiveRecord end end - def replace_named_bind_variables(statement, bind_vars) #:nodoc: - statement.gsub(/(:?):([a-zA-Z]\w*)/) do + def replace_named_bind_variables(statement, bind_vars) # :nodoc: + statement.gsub(/(:?):([a-zA-Z]\w*)/) do |match| if $1 == ':' # skip postgresql casts - $& # return the whole match + match # return the whole match elsif bind_vars.include?(match = $2.to_sym) replace_bind_variable(bind_vars[match]) else @@ -130,7 +193,7 @@ module ActiveRecord end end - def quote_bound_value(value, c = connection) #:nodoc: + def quote_bound_value(value, c = connection) # :nodoc: if value.respond_to?(:map) && !value.acts_like?(:string) if value.respond_to?(:empty?) && value.empty? c.quote(nil) @@ -142,7 +205,7 @@ module ActiveRecord end end - def raise_if_bind_arity_mismatch(statement, expected, provided) #:nodoc: + def raise_if_bind_arity_mismatch(statement, expected, provided) # :nodoc: unless expected == provided raise PreparedStatementInvalid, "wrong number of bind variables (#{provided} for #{expected}) in: #{statement}" end @@ -150,7 +213,7 @@ module ActiveRecord end # TODO: Deprecate this - def quoted_id + def quoted_id # :nodoc: self.class.quote_value(@attributes[self.class.primary_key].value_for_database) end end diff --git a/activerecord/lib/active_record/schema.rb b/activerecord/lib/active_record/schema.rb index 0a5546a760..784a02d2c3 100644 --- a/activerecord/lib/active_record/schema.rb +++ b/activerecord/lib/active_record/schema.rb @@ -1,5 +1,5 @@ module ActiveRecord - # = Active Record Schema + # = Active Record \Schema # # Allows programmers to programmatically define a schema in a portable # DSL. This means you can define tables, indexes, etc. without using SQL @@ -27,29 +27,12 @@ module ActiveRecord # # ActiveRecord::Schema is only supported by database adapters that also # support migrations, the two features being very similar. - class Schema < Migration - - # Returns the migrations paths. - # - # ActiveRecord::Schema.new.migrations_paths - # # => ["db/migrate"] # Rails migration path by default. - def migrations_paths - ActiveRecord::Migrator.migrations_paths - end - - def define(info, &block) # :nodoc: - instance_eval(&block) - - unless info[:version].blank? - initialize_schema_migrations_table - connection.assume_migrated_upto_version(info[:version], migrations_paths) - end - end - + class Schema < Migration::Current # Eval the given block. All methods available to the current connection # adapter are available within the block, so you can easily use the - # database definition DSL to build up your schema (+create_table+, - # +add_index+, etc.). + # database definition DSL to build up your schema ( + # {create_table}[rdoc-ref:ConnectionAdapters::SchemaStatements#create_table], + # {add_index}[rdoc-ref:ConnectionAdapters::SchemaStatements#add_index], etc.). # # The +info+ hash is optional, and if given is used to define metadata # about the current schema (currently, only the schema's version): @@ -60,5 +43,26 @@ module ActiveRecord def self.define(info={}, &block) new.define(info, &block) end + + def define(info, &block) # :nodoc: + instance_eval(&block) + + if info[:version].present? + initialize_schema_migrations_table + connection.assume_migrated_upto_version(info[:version], migrations_paths) + end + + ActiveRecord::InternalMetadata.create_table + ActiveRecord::InternalMetadata[:environment] = ActiveRecord::Migrator.current_environment + end + + private + # Returns the migrations paths. + # + # ActiveRecord::Schema.new.migrations_paths + # # => ["db/migrate"] # Rails migration path by default. + def migrations_paths # :nodoc: + ActiveRecord::Migrator.migrations_paths + end end end diff --git a/activerecord/lib/active_record/schema_dumper.rb b/activerecord/lib/active_record/schema_dumper.rb index c5910fa1ad..65005bd44b 100644 --- a/activerecord/lib/active_record/schema_dumper.rb +++ b/activerecord/lib/active_record/schema_dumper.rb @@ -89,7 +89,7 @@ HEADER end def tables(stream) - sorted_tables = @connection.tables.sort + sorted_tables = @connection.data_sources.sort - @connection.views sorted_tables.each do |table_name| table(table_name, stream) unless ignored?(table_name) @@ -112,20 +112,27 @@ HEADER tbl = StringIO.new # first dump primary key column - pk = @connection.primary_key(table) + if @connection.respond_to?(:primary_keys) + pk = @connection.primary_keys(table) + pk = pk.first unless pk.size > 1 + else + pk = @connection.primary_key(table) + end tbl.print " create_table #{remove_prefix_and_suffix(table).inspect}" - pkcol = columns.detect { |c| c.name == pk } - if pkcol - if pk != 'id' - tbl.print %Q(, primary_key: "#{pk}") - end + + case pk + when String + tbl.print ", primary_key: #{pk.inspect}" unless pk == 'id' + pkcol = columns.detect { |c| c.name == pk } pkcolspec = @connection.column_spec_for_primary_key(pkcol) if pkcolspec pkcolspec.each do |key, value| tbl.print ", #{key}: #{value}" end end + when Array + tbl.print ", primary_key: #{pk.inspect}" else tbl.print ", id: false" end @@ -247,7 +254,7 @@ HEADER end def ignored?(table_name) - ['schema_migrations', ignore_tables].flatten.any? do |ignored| + [ActiveRecord::Base.schema_migrations_table_name, ActiveRecord::Base.internal_metadata_table_name, ignore_tables].flatten.any? do |ignored| ignored === remove_prefix_and_suffix(table_name) end end diff --git a/activerecord/lib/active_record/schema_migration.rb b/activerecord/lib/active_record/schema_migration.rb index b5038104ac..ee4c71f304 100644 --- a/activerecord/lib/active_record/schema_migration.rb +++ b/activerecord/lib/active_record/schema_migration.rb @@ -1,12 +1,15 @@ require 'active_record/scoping/default' require 'active_record/scoping/named' -require 'active_record/base' module ActiveRecord - class SchemaMigration < ActiveRecord::Base + # This class is used to create a table that keeps track of which migrations + # have been applied to a given database. When a migration is run, its schema + # number is inserted in to the `SchemaMigration.table_name` so it doesn't need + # to be executed the next time. + class SchemaMigration < ActiveRecord::Base # :nodoc: class << self def primary_key - nil + "version" end def table_name @@ -18,7 +21,7 @@ module ActiveRecord end def table_exists? - connection.table_exists?(table_name) + ActiveSupport::Deprecation.silence { connection.table_exists?(table_name) } end def create_table(limit=nil) @@ -28,8 +31,8 @@ module ActiveRecord connection.create_table(table_name, id: false) do |t| t.column :version, :string, version_options + t.index :version, unique: true, name: index_name end - connection.add_index table_name, :version, unique: true, name: index_name end end diff --git a/activerecord/lib/active_record/scoping.rb b/activerecord/lib/active_record/scoping.rb index f049b658c4..7794af8ca4 100644 --- a/activerecord/lib/active_record/scoping.rb +++ b/activerecord/lib/active_record/scoping.rb @@ -11,11 +11,11 @@ module ActiveRecord module ClassMethods def current_scope #:nodoc: - ScopeRegistry.value_for(:current_scope, self.to_s) + ScopeRegistry.value_for(:current_scope, self) end def current_scope=(scope) #:nodoc: - ScopeRegistry.set_value_for(:current_scope, self.to_s, scope) + ScopeRegistry.set_value_for(:current_scope, self, scope) end # Collects attributes from scopes that should be applied when creating @@ -30,7 +30,7 @@ module ActiveRecord end end - def populate_with_current_scope_attributes + def populate_with_current_scope_attributes # :nodoc: return unless self.class.scope_attributes? self.class.scope_attributes.each do |att,value| @@ -38,7 +38,7 @@ module ActiveRecord end end - def initialize_internals_callback + def initialize_internals_callback # :nodoc: super populate_with_current_scope_attributes end @@ -53,18 +53,18 @@ module ActiveRecord # following code: # # registry = ActiveRecord::Scoping::ScopeRegistry - # registry.set_value_for(:current_scope, "Board", some_new_scope) + # registry.set_value_for(:current_scope, Board, some_new_scope) # # Now when you run: # - # registry.value_for(:current_scope, "Board") + # registry.value_for(:current_scope, Board) # - # You will obtain whatever was defined in +some_new_scope+. The +value_for+ - # and +set_value_for+ methods are delegated to the current +ScopeRegistry+ + # You will obtain whatever was defined in +some_new_scope+. The #value_for + # and #set_value_for methods are delegated to the current ScopeRegistry # object, so the above example code can also be called as: # # ActiveRecord::Scoping::ScopeRegistry.set_value_for(:current_scope, - # "Board", some_new_scope) + # Board, some_new_scope) class ScopeRegistry # :nodoc: extend ActiveSupport::PerThreadRegistry @@ -74,16 +74,22 @@ module ActiveRecord @registry = Hash.new { |hash, key| hash[key] = {} } end - # Obtains the value for a given +scope_name+ and +variable_name+. - def value_for(scope_type, variable_name) + # Obtains the value for a given +scope_type+ and +model+. + def value_for(scope_type, model) raise_invalid_scope_type!(scope_type) - @registry[scope_type][variable_name] + klass = model + base = model.base_class + while klass <= base + value = @registry[scope_type][klass.name] + return value if value + klass = klass.superclass + end end - # Sets the +value+ for a given +scope_type+ and +variable_name+. - def set_value_for(scope_type, variable_name, value) + # Sets the +value+ for a given +scope_type+ and +model+. + def set_value_for(scope_type, model, value) raise_invalid_scope_type!(scope_type) - @registry[scope_type][variable_name] = value + @registry[scope_type][model.name] = value end private diff --git a/activerecord/lib/active_record/scoping/default.rb b/activerecord/lib/active_record/scoping/default.rb index 3590b8846e..8baf3b8044 100644 --- a/activerecord/lib/active_record/scoping/default.rb +++ b/activerecord/lib/active_record/scoping/default.rb @@ -6,8 +6,10 @@ module ActiveRecord included do # Stores the default scope for the class. class_attribute :default_scopes, instance_writer: false, instance_predicate: false + class_attribute :default_scope_override, instance_predicate: false self.default_scopes = [] + self.default_scope_override = nil end module ClassMethods @@ -15,7 +17,7 @@ module ActiveRecord # # class Post < ActiveRecord::Base # def self.default_scope - # where published: true + # where(published: true) # end # end # @@ -53,7 +55,7 @@ module ActiveRecord # # Article.all # => SELECT * FROM articles WHERE published = true # - # The +default_scope+ is also applied while creating/building a record. + # The #default_scope is also applied while creating/building a record. # It is not applied while updating a record. # # Article.new.published # => true @@ -63,7 +65,7 @@ module ActiveRecord # +default_scope+ macro, and it will be called when building the # default scope.) # - # If you use multiple +default_scope+ declarations in your model then + # If you use multiple #default_scope declarations in your model then # they will be merged together: # # class Article < ActiveRecord::Base @@ -74,7 +76,7 @@ module ActiveRecord # Article.all # => SELECT * FROM articles WHERE published = true AND rating = 'G' # # This is also the case with inheritance and module includes where the - # parent or module defines a +default_scope+ and the child or including + # parent or module defines a #default_scope and the child or including # class defines a second one. # # If you need to do more complex things with a default scope, you can @@ -99,11 +101,18 @@ module ActiveRecord self.default_scopes += [scope] end - def build_default_scope(base_rel = relation) # :nodoc: - if !Base.is_a?(method(:default_scope).owner) + def build_default_scope(base_rel = nil) # :nodoc: + return if abstract_class? + + if self.default_scope_override.nil? + self.default_scope_override = !Base.is_a?(method(:default_scope).owner) + end + + if self.default_scope_override # The user has defined their own default scope method, so call that evaluate_default_scope { default_scope } elsif default_scopes.any? + base_rel ||= relation evaluate_default_scope do default_scopes.inject(base_rel) do |default_scope, scope| default_scope.merge(base_rel.scoping { scope.call }) @@ -113,11 +122,11 @@ module ActiveRecord end def ignore_default_scope? # :nodoc: - ScopeRegistry.value_for(:ignore_default_scope, self) + ScopeRegistry.value_for(:ignore_default_scope, base_class) end def ignore_default_scope=(ignore) # :nodoc: - ScopeRegistry.set_value_for(:ignore_default_scope, self, ignore) + ScopeRegistry.set_value_for(:ignore_default_scope, base_class, ignore) end # The ignore_default_scope flag is used to prevent an infinite recursion diff --git a/activerecord/lib/active_record/scoping/named.rb b/activerecord/lib/active_record/scoping/named.rb index 7b62626896..103569c84d 100644 --- a/activerecord/lib/active_record/scoping/named.rb +++ b/activerecord/lib/active_record/scoping/named.rb @@ -9,7 +9,7 @@ module ActiveRecord extend ActiveSupport::Concern module ClassMethods - # Returns an <tt>ActiveRecord::Relation</tt> scope object. + # Returns an ActiveRecord::Relation scope object. # # posts = Post.all # posts.size # Fires "select count(*) from posts" and returns the count @@ -20,7 +20,7 @@ module ActiveRecord # fruits = fruits.limit(10) if limited? # # You can define a scope that applies to all finders using - # <tt>ActiveRecord::Base.default_scope</tt>. + # {default_scope}[rdoc-ref:Scoping::Default::ClassMethods#default_scope]. def all if current_scope current_scope.clone @@ -39,8 +39,13 @@ module ActiveRecord end end - # Adds a class method for retrieving and querying objects. A \scope - # represents a narrowing of a database query, such as + # Adds a class method for retrieving and querying objects. + # The method is intended to return an ActiveRecord::Relation + # object, which is composable with other scopes. + # If it returns nil or false, an + # {all}[rdoc-ref:Scoping::Named::ClassMethods#all] scope is returned instead. + # + # A \scope represents a narrowing of a database query, such as # <tt>where(color: :red).select('shirts.*').includes(:washing_instructions)</tt>. # # class Shirt < ActiveRecord::Base @@ -48,12 +53,12 @@ module ActiveRecord # scope :dry_clean_only, -> { joins(:washing_instructions).where('washing_instructions.dry_clean_only = ?', true) } # end # - # The above calls to +scope+ define class methods <tt>Shirt.red</tt> and + # The above calls to #scope define class methods <tt>Shirt.red</tt> and # <tt>Shirt.dry_clean_only</tt>. <tt>Shirt.red</tt>, in effect, # represents the query <tt>Shirt.where(color: 'red')</tt>. # # You should always pass a callable object to the scopes defined - # with +scope+. This ensures that the scope is re-evaluated each + # with #scope. This ensures that the scope is re-evaluated each # time it is called. # # Note that this is simply 'syntactic sugar' for defining an actual @@ -66,14 +71,15 @@ module ActiveRecord # end # # Unlike <tt>Shirt.find(...)</tt>, however, the object returned by - # <tt>Shirt.red</tt> is not an Array; it resembles the association object - # constructed by a +has_many+ declaration. For instance, you can invoke - # <tt>Shirt.red.first</tt>, <tt>Shirt.red.count</tt>, + # <tt>Shirt.red</tt> is not an Array but an ActiveRecord::Relation, + # which is composable with other scopes; it resembles the association object + # constructed by a {has_many}[rdoc-ref:Associations::ClassMethods#has_many] + # declaration. For instance, you can invoke <tt>Shirt.red.first</tt>, <tt>Shirt.red.count</tt>, # <tt>Shirt.red.where(size: 'small')</tt>. Also, just as with the # association objects, named \scopes act like an Array, implementing # Enumerable; <tt>Shirt.red.each(&block)</tt>, <tt>Shirt.red.first</tt>, # and <tt>Shirt.red.inject(memo, &block)</tt> all behave as if - # <tt>Shirt.red</tt> really was an Array. + # <tt>Shirt.red</tt> really was an array. # # These named \scopes are composable. For instance, # <tt>Shirt.red.dry_clean_only</tt> will produce all shirts that are @@ -84,7 +90,8 @@ module ActiveRecord # # All scopes are available as class methods on the ActiveRecord::Base # descendant upon which the \scopes were defined. But they are also - # available to +has_many+ associations. If, + # available to {has_many}[rdoc-ref:Associations::ClassMethods#has_many] + # associations. If, # # class Person < ActiveRecord::Base # has_many :shirts @@ -93,8 +100,8 @@ module ActiveRecord # then <tt>elton.shirts.red.dry_clean_only</tt> will return all of # Elton's red, dry clean only shirts. # - # \Named scopes can also have extensions, just as with +has_many+ - # declarations: + # \Named scopes can also have extensions, just as with + # {has_many}[rdoc-ref:Associations::ClassMethods#has_many] declarations: # # class Shirt < ActiveRecord::Base # scope :red, -> { where(color: 'red') } do diff --git a/activerecord/lib/active_record/secure_token.rb b/activerecord/lib/active_record/secure_token.rb index ca11853da7..8abda2ac49 100644 --- a/activerecord/lib/active_record/secure_token.rb +++ b/activerecord/lib/active_record/secure_token.rb @@ -3,7 +3,7 @@ module ActiveRecord extend ActiveSupport::Concern module ClassMethods - # Example using has_secure_token + # Example using #has_secure_token # # # Schema: User(token:string, auth_token:string) # class User < ActiveRecord::Base @@ -18,11 +18,11 @@ module ActiveRecord # user.regenerate_token # => true # user.regenerate_auth_token # => true # - # SecureRandom::base58 is used to generate the 24-character unique token, so collisions are highly unlikely. + # <tt>SecureRandom::base58</tt> is used to generate the 24-character unique token, so collisions are highly unlikely. # # Note that it's still possible to generate a race condition in the database in the same way that - # <tt>validates_uniqueness_of</tt> can. You're encouraged to add a unique index in the database to deal - # with this even more unlikely scenario. + # {validates_uniqueness_of}[rdoc-ref:Validations::ClassMethods#validates_uniqueness_of] can. + # You're encouraged to add a unique index in the database to deal with this even more unlikely scenario. def has_secure_token(attribute = :token) # Load securerandom only when has_secure_token is used. require 'active_support/core_ext/securerandom' diff --git a/activerecord/lib/active_record/serialization.rb b/activerecord/lib/active_record/serialization.rb index 48c12dcf9f..5a408e7b8e 100644 --- a/activerecord/lib/active_record/serialization.rb +++ b/activerecord/lib/active_record/serialization.rb @@ -1,5 +1,5 @@ module ActiveRecord #:nodoc: - # = Active Record Serialization + # = Active Record \Serialization module Serialization extend ActiveSupport::Concern include ActiveModel::Serializers::JSON @@ -18,5 +18,3 @@ module ActiveRecord #:nodoc: end end end - -require 'active_record/serializers/xml_serializer' diff --git a/activerecord/lib/active_record/serializers/xml_serializer.rb b/activerecord/lib/active_record/serializers/xml_serializer.rb deleted file mode 100644 index 89b7e0be82..0000000000 --- a/activerecord/lib/active_record/serializers/xml_serializer.rb +++ /dev/null @@ -1,193 +0,0 @@ -require 'active_support/core_ext/hash/conversions' - -module ActiveRecord #:nodoc: - module Serialization - include ActiveModel::Serializers::Xml - - # Builds an XML document to represent the model. Some configuration is - # available through +options+. However more complicated cases should - # override ActiveRecord::Base#to_xml. - # - # By default the generated XML document will include the processing - # instruction and all the object's attributes. For example: - # - # <?xml version="1.0" encoding="UTF-8"?> - # <topic> - # <title>The First Topic</title> - # <author-name>David</author-name> - # <id type="integer">1</id> - # <approved type="boolean">false</approved> - # <replies-count type="integer">0</replies-count> - # <bonus-time type="dateTime">2000-01-01T08:28:00+12:00</bonus-time> - # <written-on type="dateTime">2003-07-16T09:28:00+1200</written-on> - # <content>Have a nice day</content> - # <author-email-address>david@loudthinking.com</author-email-address> - # <parent-id></parent-id> - # <last-read type="date">2004-04-15</last-read> - # </topic> - # - # This behavior can be controlled with <tt>:only</tt>, <tt>:except</tt>, - # <tt>:skip_instruct</tt>, <tt>:skip_types</tt>, <tt>:dasherize</tt> and <tt>:camelize</tt> . - # The <tt>:only</tt> and <tt>:except</tt> options are the same as for the - # +attributes+ method. The default is to dasherize all column names, but you - # can disable this setting <tt>:dasherize</tt> to +false+. Setting <tt>:camelize</tt> - # to +true+ will camelize all column names - this also overrides <tt>:dasherize</tt>. - # To not have the column type included in the XML output set <tt>:skip_types</tt> to +true+. - # - # For instance: - # - # topic.to_xml(skip_instruct: true, except: [ :id, :bonus_time, :written_on, :replies_count ]) - # - # <topic> - # <title>The First Topic</title> - # <author-name>David</author-name> - # <approved type="boolean">false</approved> - # <content>Have a nice day</content> - # <author-email-address>david@loudthinking.com</author-email-address> - # <parent-id></parent-id> - # <last-read type="date">2004-04-15</last-read> - # </topic> - # - # To include first level associations use <tt>:include</tt>: - # - # firm.to_xml include: [ :account, :clients ] - # - # <?xml version="1.0" encoding="UTF-8"?> - # <firm> - # <id type="integer">1</id> - # <rating type="integer">1</rating> - # <name>37signals</name> - # <clients type="array"> - # <client> - # <rating type="integer">1</rating> - # <name>Summit</name> - # </client> - # <client> - # <rating type="integer">1</rating> - # <name>Microsoft</name> - # </client> - # </clients> - # <account> - # <id type="integer">1</id> - # <credit-limit type="integer">50</credit-limit> - # </account> - # </firm> - # - # Additionally, the record being serialized will be passed to a Proc's second - # parameter. This allows for ad hoc additions to the resultant document that - # incorporate the context of the record being serialized. And by leveraging the - # closure created by a Proc, to_xml can be used to add elements that normally fall - # outside of the scope of the model -- for example, generating and appending URLs - # associated with models. - # - # proc = Proc.new { |options, record| options[:builder].tag!('name-reverse', record.name.reverse) } - # firm.to_xml procs: [ proc ] - # - # <firm> - # # ... normal attributes as shown above ... - # <name-reverse>slangis73</name-reverse> - # </firm> - # - # To include deeper levels of associations pass a hash like this: - # - # firm.to_xml include: {account: {}, clients: {include: :address}} - # <?xml version="1.0" encoding="UTF-8"?> - # <firm> - # <id type="integer">1</id> - # <rating type="integer">1</rating> - # <name>37signals</name> - # <clients type="array"> - # <client> - # <rating type="integer">1</rating> - # <name>Summit</name> - # <address> - # ... - # </address> - # </client> - # <client> - # <rating type="integer">1</rating> - # <name>Microsoft</name> - # <address> - # ... - # </address> - # </client> - # </clients> - # <account> - # <id type="integer">1</id> - # <credit-limit type="integer">50</credit-limit> - # </account> - # </firm> - # - # To include any methods on the model being called use <tt>:methods</tt>: - # - # firm.to_xml methods: [ :calculated_earnings, :real_earnings ] - # - # <firm> - # # ... normal attributes as shown above ... - # <calculated-earnings>100000000000000000</calculated-earnings> - # <real-earnings>5</real-earnings> - # </firm> - # - # To call any additional Procs use <tt>:procs</tt>. The Procs are passed a - # modified version of the options hash that was given to +to_xml+: - # - # proc = Proc.new { |options| options[:builder].tag!('abc', 'def') } - # firm.to_xml procs: [ proc ] - # - # <firm> - # # ... normal attributes as shown above ... - # <abc>def</abc> - # </firm> - # - # Alternatively, you can yield the builder object as part of the +to_xml+ call: - # - # firm.to_xml do |xml| - # xml.creator do - # xml.first_name "David" - # xml.last_name "Heinemeier Hansson" - # end - # end - # - # <firm> - # # ... normal attributes as shown above ... - # <creator> - # <first_name>David</first_name> - # <last_name>Heinemeier Hansson</last_name> - # </creator> - # </firm> - # - # As noted above, you may override +to_xml+ in your ActiveRecord::Base - # subclasses to have complete control about what's generated. The general - # form of doing this is: - # - # class IHaveMyOwnXML < ActiveRecord::Base - # def to_xml(options = {}) - # require 'builder' - # options[:indent] ||= 2 - # xml = options[:builder] ||= ::Builder::XmlMarkup.new(indent: options[:indent]) - # xml.instruct! unless options[:skip_instruct] - # xml.level_one do - # xml.tag!(:second_level, 'content') - # end - # end - # end - def to_xml(options = {}, &block) - XmlSerializer.new(self, options).serialize(&block) - end - end - - class XmlSerializer < ActiveModel::Serializers::Xml::Serializer #:nodoc: - class Attribute < ActiveModel::Serializers::Xml::Serializer::Attribute #:nodoc: - def compute_type - klass = @serializable.class - cast_type = klass.type_for_attribute(name) - - type = ActiveSupport::XmlMini::TYPE_NAMES[value.class.name] || cast_type.type - - { :text => :string, - :time => :datetime }[type] || type - end - protected :compute_type - end - end -end diff --git a/activerecord/lib/active_record/statement_cache.rb b/activerecord/lib/active_record/statement_cache.rb index 95986c820c..f6b0efb88a 100644 --- a/activerecord/lib/active_record/statement_cache.rb +++ b/activerecord/lib/active_record/statement_cache.rb @@ -7,12 +7,14 @@ module ActiveRecord # Book.where(name: "my book").where("author_id > 3") # end # - # The cached statement is executed by using the +execute+ method: + # The cached statement is executed by using the + # [connection.execute]{rdoc-ref:ConnectionAdapters::DatabaseStatements#execute} method: # # cache.execute([], Book, Book.connection) # - # The relation returned by the block is cached, and for each +execute+ call the cached relation gets duped. - # Database is queried when +to_a+ is called on the relation. + # The relation returned by the block is cached, and for each + # [execute]{rdoc-ref:ConnectionAdapters::DatabaseStatements#execute} + # call the cached relation gets duped. Database is queried when +to_a+ is called on the relation. # # If you want to cache the statement without the values you can use the +bind+ method of the # block parameter. diff --git a/activerecord/lib/active_record/store.rb b/activerecord/lib/active_record/store.rb index 919bc58ba5..1b407f7702 100644 --- a/activerecord/lib/active_record/store.rb +++ b/activerecord/lib/active_record/store.rb @@ -16,7 +16,8 @@ module ActiveRecord # JSON, YAML, Marshal are supported out of the box. Generally it can be any wrapper that provides +load+ and +dump+. # # NOTE: If you are using PostgreSQL specific columns like +hstore+ or +json+ there is no need for - # the serialization provided by +store+. Simply use +store_accessor+ instead to generate + # the serialization provided by {.store}[rdoc-ref:rdoc-ref:ClassMethods#store]. + # Simply use {.store_accessor}[rdoc-ref:ClassMethods#store_accessor] instead to generate # the accessor methods. Be aware that these columns use a string keyed hash and do not allow access # using a symbol. # @@ -43,7 +44,7 @@ module ActiveRecord # store_accessor :settings, :privileges, :servants # end # - # The stored attribute names can be retrieved using +stored_attributes+. + # The stored attribute names can be retrieved using {.stored_attributes}[rdoc-ref:rdoc-ref:ClassMethods#stored_attributes]. # # User.stored_attributes[:settings] # [:color, :homepage] # diff --git a/activerecord/lib/active_record/suppressor.rb b/activerecord/lib/active_record/suppressor.rb index b0b86865fd..b3644bf569 100644 --- a/activerecord/lib/active_record/suppressor.rb +++ b/activerecord/lib/active_record/suppressor.rb @@ -37,8 +37,7 @@ module ActiveRecord end end - # Ignore saving events if we're in suppression mode. - def save!(*args) # :nodoc: + def create_or_update(*args) # :nodoc: SuppressorRegistry.suppressed[self.class.name] ? true : super end end diff --git a/activerecord/lib/active_record/table_metadata.rb b/activerecord/lib/active_record/table_metadata.rb index 3dd6321a97..f9bb1cf5e0 100644 --- a/activerecord/lib/active_record/table_metadata.rb +++ b/activerecord/lib/active_record/table_metadata.rb @@ -10,13 +10,15 @@ module ActiveRecord end def resolve_column_aliases(hash) - hash = hash.dup - hash.keys.grep(Symbol) do |key| - if klass.attribute_alias? key - hash[klass.attribute_alias(key)] = hash.delete key + # This method is a hot spot, so for now, use Hash[] to dup the hash. + # https://bugs.ruby-lang.org/issues/7166 + new_hash = Hash[hash] + hash.each do |key, _| + if (key.is_a?(Symbol)) && klass.attribute_alias?(key) + new_hash[klass.attribute_alias(key)] = new_hash.delete(key) end end - hash + new_hash end def arel_attribute(column_name) @@ -41,7 +43,7 @@ module ActiveRecord association = klass._reflect_on_association(table_name) if association && !association.polymorphic? association_klass = association.klass - arel_table = association_klass.arel_table + arel_table = association_klass.arel_table.alias(table_name) else type_caster = TypeCaster::Connection.new(klass, table_name) association_klass = nil diff --git a/activerecord/lib/active_record/tasks/database_tasks.rb b/activerecord/lib/active_record/tasks/database_tasks.rb index 683741768b..8f52e9068a 100644 --- a/activerecord/lib/active_record/tasks/database_tasks.rb +++ b/activerecord/lib/active_record/tasks/database_tasks.rb @@ -5,7 +5,7 @@ module ActiveRecord class DatabaseAlreadyExists < StandardError; end # :nodoc: class DatabaseNotSupported < StandardError; end # :nodoc: - # <tt>ActiveRecord::Tasks::DatabaseTasks</tt> is a utility class, which encapsulates + # ActiveRecord::Tasks::DatabaseTasks is a utility class, which encapsulates # logic behind common tasks used to manage database and migrations. # # The tasks defined here are used with Rake tasks provided by Active Record. @@ -18,15 +18,15 @@ module ActiveRecord # # The possible config values are: # - # * +env+: current environment (like Rails.env). - # * +database_configuration+: configuration of your databases (as in +config/database.yml+). - # * +db_dir+: your +db+ directory. - # * +fixtures_path+: a path to fixtures directory. - # * +migrations_paths+: a list of paths to directories with migrations. - # * +seed_loader+: an object which will load seeds, it needs to respond to the +load_seed+ method. - # * +root+: a path to the root of the application. + # * +env+: current environment (like Rails.env). + # * +database_configuration+: configuration of your databases (as in +config/database.yml+). + # * +db_dir+: your +db+ directory. + # * +fixtures_path+: a path to fixtures directory. + # * +migrations_paths+: a list of paths to directories with migrations. + # * +seed_loader+: an object which will load seeds, it needs to respond to the +load_seed+ method. + # * +root+: a path to the root of the application. # - # Example usage of +DatabaseTasks+ outside Rails could look as such: + # Example usage of DatabaseTasks outside Rails could look as such: # # include ActiveRecord::Tasks # DatabaseTasks.database_configuration = YAML.load_file('my_database_config.yml') @@ -42,6 +42,22 @@ module ActiveRecord LOCAL_HOSTS = ['127.0.0.1', 'localhost'] + def check_protected_environments! + unless ENV['DISABLE_DATABASE_ENVIRONMENT_CHECK'] + current = ActiveRecord::Migrator.current_environment + stored = ActiveRecord::Migrator.last_stored_environment + + if ActiveRecord::Migrator.protected_environment? + raise ActiveRecord::ProtectedEnvironmentError.new(stored) + end + + if stored && stored != current + raise ActiveRecord::EnvironmentMismatchError.new(current: current, stored: stored) + end + end + rescue ActiveRecord::NoDatabaseError + end + def register_task(pattern, task) @tasks ||= {} @tasks[pattern] = task @@ -94,8 +110,9 @@ module ActiveRecord rescue DatabaseAlreadyExists $stderr.puts "#{configuration['database']} already exists" rescue Exception => error - $stderr.puts error, *(error.backtrace) + $stderr.puts error $stderr.puts "Couldn't create database for #{configuration.inspect}" + raise end def create_all @@ -115,8 +132,9 @@ module ActiveRecord rescue ActiveRecord::NoDatabaseError $stderr.puts "Database '#{configuration['database']}' does not exist" rescue Exception => error - $stderr.puts error, *(error.backtrace) + $stderr.puts error $stderr.puts "Couldn't drop #{configuration['database']}" + raise end def drop_all @@ -134,7 +152,7 @@ module ActiveRecord version = ENV["VERSION"] ? ENV["VERSION"].to_i : nil scope = ENV['SCOPE'] verbose_was, Migration.verbose = Migration.verbose, verbose - Migrator.migrate(Migrator.migrations_paths, version) do |migration| + Migrator.migrate(migrations_paths, version) do |migration| scope.blank? || scope == migration.scope end ensure @@ -202,6 +220,8 @@ module ActiveRecord else raise ArgumentError, "unknown format #{format.inspect}" end + ActiveRecord::InternalMetadata.create_table + ActiveRecord::InternalMetadata[:environment] = ActiveRecord::Migrator.current_environment end def load_schema_for(*args) @@ -221,12 +241,6 @@ module ActiveRecord end end - def load_schema_current_if_exists(format = ActiveRecord::Base.schema_format, file = nil, environment = env) - if File.exist?(file || schema_file(format)) - load_schema_current(format, file, environment) - end - end - def load_schema_current(format = ActiveRecord::Base.schema_format, file = nil, environment = env) each_current_configuration(environment) { |configuration| load_schema configuration, format, file @@ -236,7 +250,7 @@ module ActiveRecord def check_schema_file(filename) unless File.exist?(filename) - message = %{#{filename} doesn't exist yet. Run `rake db:migrate` to create it, then try again.} + message = %{#{filename} doesn't exist yet. Run `rails db:migrate` to create it, then try again.} message << %{ If you do not intend to use a database, you should instead alter #{Rails.root}/config/application.rb to limit the frameworks that will be loaded.} if defined?(::Rails) Kernel.abort message end diff --git a/activerecord/lib/active_record/tasks/mysql_database_tasks.rb b/activerecord/lib/active_record/tasks/mysql_database_tasks.rb index bc80275a88..7a49322e06 100644 --- a/activerecord/lib/active_record/tasks/mysql_database_tasks.rb +++ b/activerecord/lib/active_record/tasks/mysql_database_tasks.rb @@ -1,8 +1,6 @@ module ActiveRecord module Tasks # :nodoc: class MySQLDatabaseTasks # :nodoc: - DEFAULT_CHARSET = ENV['CHARSET'] || 'utf8' - DEFAULT_COLLATION = ENV['COLLATION'] || 'utf8_unicode_ci' ACCESS_DENIED_ERROR = 1045 delegate :connection, :establish_connection, to: ActiveRecord::Base @@ -23,7 +21,7 @@ module ActiveRecord end rescue error_class => error if error.respond_to?(:errno) && error.errno == ACCESS_DENIED_ERROR - $stdout.print error.error + $stdout.print error.message establish_connection root_configuration_without_database connection.create_database configuration['database'], creation_options if configuration['username'] != 'root' @@ -56,21 +54,21 @@ module ActiveRecord end def structure_dump(filename) - args = prepare_command_options('mysqldump') + args = prepare_command_options args.concat(["--result-file", "#{filename}"]) args.concat(["--no-data"]) + args.concat(["--routines"]) args.concat(["#{configuration['database']}"]) - unless Kernel.system(*args) - $stderr.puts "Could not dump the database structure. "\ - "Make sure `mysqldump` is in your PATH and check the command output for warnings." - end + + run_cmd('mysqldump', args, 'dumping') end def structure_load(filename) - args = prepare_command_options('mysql') + args = prepare_command_options args.concat(['--execute', %{SET FOREIGN_KEY_CHECKS = 0; SOURCE #{filename}; SET FOREIGN_KEY_CHECKS = 1}]) args.concat(["--database", "#{configuration['database']}"]) - Kernel.system(*args) + + run_cmd('mysql', args, 'loading') end private @@ -87,12 +85,6 @@ module ActiveRecord Hash.new.tap do |options| options[:charset] = configuration['encoding'] if configuration.include? 'encoding' options[:collation] = configuration['collation'] if configuration.include? 'collation' - - # Set default charset only when collation isn't set. - options[:charset] ||= DEFAULT_CHARSET unless options[:collation] - - # Set default collation only when charset is also default. - options[:collation] ||= DEFAULT_COLLATION if options[:charset] == DEFAULT_CHARSET end end @@ -102,8 +94,6 @@ module ActiveRecord ArJdbcMySQL::Error elsif defined?(Mysql2) Mysql2::Error - elsif defined?(Mysql) - Mysql::Error else StandardError end @@ -129,7 +119,7 @@ IDENTIFIED BY '#{configuration['password']}' WITH GRANT OPTION; $stdin.gets.strip end - def prepare_command_options(command) + def prepare_command_options args = { 'host' => '--host', 'port' => '--port', @@ -144,7 +134,17 @@ IDENTIFIED BY '#{configuration['password']}' WITH GRANT OPTION; 'sslkey' => '--ssl-key' }.map { |opt, arg| "#{arg}=#{configuration[opt]}" if configuration[opt] }.compact - [command, *args] + args + end + + def run_cmd(cmd, args, action) + fail run_cmd_error(cmd, args, action) unless Kernel.system(cmd, *args) + end + + def run_cmd_error(cmd, args, action) + msg = "failed to execute: `#{cmd}`\n" + msg << "Please check the output above for any errors and make sure that `#{cmd}` is installed in your PATH and has proper permissions.\n\n" + msg end end end diff --git a/activerecord/lib/active_record/tasks/postgresql_database_tasks.rb b/activerecord/lib/active_record/tasks/postgresql_database_tasks.rb index d7da95c8a9..8b4874044c 100644 --- a/activerecord/lib/active_record/tasks/postgresql_database_tasks.rb +++ b/activerecord/lib/active_record/tasks/postgresql_database_tasks.rb @@ -1,5 +1,3 @@ -require 'shellwords' - module ActiveRecord module Tasks # :nodoc: class PostgreSQLDatabaseTasks # :nodoc: @@ -55,19 +53,22 @@ module ActiveRecord when String ActiveRecord::Base.dump_schemas end + + args = ['-s', '-x', '-O', '-f', filename] unless search_path.blank? - search_path = search_path.split(",").map{|search_path_part| "--schema=#{Shellwords.escape(search_path_part.strip)}" }.join(" ") + args += search_path.split(',').map do |part| + "--schema=#{part.strip}" + end end - - command = "pg_dump -i -s -x -O -f #{Shellwords.escape(filename)} #{search_path} #{Shellwords.escape(configuration['database'])}" - raise 'Error dumping database' unless Kernel.system(command) - + args << configuration['database'] + run_cmd('pg_dump', args, 'dumping') File.open(filename, "a") { |f| f << "SET search_path TO #{connection.schema_search_path};\n\n" } end def structure_load(filename) set_psql_env - Kernel.system("psql -X -q -f #{Shellwords.escape(filename)} #{configuration['database']}") + args = [ '-q', '-f', filename, configuration['database'] ] + run_cmd('psql', args, 'loading' ) end private @@ -93,6 +94,17 @@ module ActiveRecord ENV['PGPASSWORD'] = configuration['password'].to_s if configuration['password'] ENV['PGUSER'] = configuration['username'].to_s if configuration['username'] end + + def run_cmd(cmd, args, action) + fail run_cmd_error(cmd, args, action) unless Kernel.system(cmd, *args) + end + + def run_cmd_error(cmd, args, action) + msg = "failed to execute:\n" + msg << "#{cmd} #{args.join(' ')}\n\n" + msg << "Please check the output above for any errors and make sure that `#{cmd}` is installed in your PATH and has proper permissions.\n\n" + msg + end end end end diff --git a/activerecord/lib/active_record/tasks/sqlite_database_tasks.rb b/activerecord/lib/active_record/tasks/sqlite_database_tasks.rb index 9ab64d0325..9ec3c8a94a 100644 --- a/activerecord/lib/active_record/tasks/sqlite_database_tasks.rb +++ b/activerecord/lib/active_record/tasks/sqlite_database_tasks.rb @@ -19,11 +19,15 @@ module ActiveRecord path = Pathname.new configuration['database'] file = path.absolute? ? path.to_s : File.join(root, path) - FileUtils.rm(file) if File.exist?(file) + FileUtils.rm(file) + rescue Errno::ENOENT => error + raise NoDatabaseError.new(error.message, error) end def purge drop + rescue NoDatabaseError + ensure create end diff --git a/activerecord/lib/active_record/timestamp.rb b/activerecord/lib/active_record/timestamp.rb index 20e4235788..a572c109d8 100644 --- a/activerecord/lib/active_record/timestamp.rb +++ b/activerecord/lib/active_record/timestamp.rb @@ -1,5 +1,5 @@ module ActiveRecord - # = Active Record Timestamp + # = Active Record \Timestamp # # Active Record automatically timestamps create and update operations if the # table has fields named <tt>created_at/created_on</tt> or @@ -15,14 +15,21 @@ module ActiveRecord # # == Time Zone aware attributes # - # By default, ActiveRecord::Base keeps all the datetime columns time zone aware by executing following code. + # Active Record keeps all the <tt>datetime</tt> and <tt>time</tt> columns + # time-zone aware. By default, these values are stored in the database as UTC + # and converted back to the current <tt>Time.zone</tt> when pulled from the database. # - # config.active_record.time_zone_aware_attributes = true + # This feature can be turned off completely by setting: # - # This feature can easily be turned off by assigning value <tt>false</tt> . + # config.active_record.time_zone_aware_attributes = false # - # If your attributes are time zone aware and you desire to skip time zone conversion to the current Time.zone - # when reading certain attributes then you can do following: + # You can also specify that only <tt>datetime</tt> columns should be time-zone + # aware (while <tt>time</tt> should not) by setting: + # + # ActiveRecord::Base.time_zone_aware_types = [:datetime] + # + # Finally, you can indicate specific attributes of a model for which time zone + # conversion should not applied, for instance by setting: # # class Topic < ActiveRecord::Base # self.skip_time_zone_conversion_for_attributes = [:written_on] diff --git a/activerecord/lib/active_record/touch_later.rb b/activerecord/lib/active_record/touch_later.rb index 4352a0ffea..9a80a63e28 100644 --- a/activerecord/lib/active_record/touch_later.rb +++ b/activerecord/lib/active_record/touch_later.rb @@ -16,6 +16,13 @@ module ActiveRecord surreptitiously_touch @_defer_touch_attrs self.class.connection.add_transaction_record self + + # touch the parents as we are not calling the after_save callbacks + self.class.reflect_on_all_associations(:belongs_to).each do |r| + if touch = r.options[:touch] + ActiveRecord::Associations::Builder::BelongsTo.touch_record(self, r.foreign_key, r.name, touch, :touch_later) + end + end end def touch(*names, time: nil) # :nodoc: @@ -26,6 +33,7 @@ module ActiveRecord end private + def surreptitiously_touch(attrs) attrs.each { |attr| write_attribute attr, @_touch_time } clear_attribute_changes attrs @@ -33,9 +41,8 @@ module ActiveRecord def touch_deferred_attributes if has_defer_touch_attrs? && persisted? - @_touching_delayed_records = true touch(*@_defer_touch_attrs, time: @_touch_time) - @_touching_delayed_records, @_defer_touch_attrs, @_touch_time = nil, nil, nil + @_defer_touch_attrs, @_touch_time = nil, nil end end @@ -43,8 +50,9 @@ module ActiveRecord defined?(@_defer_touch_attrs) && @_defer_touch_attrs.present? end - def touching_delayed_records? - defined?(@_touching_delayed_records) && @_touching_delayed_records + def belongs_to_touch_method + :touch_later end + end end diff --git a/activerecord/lib/active_record/transactions.rb b/activerecord/lib/active_record/transactions.rb index 311dacb449..38ab1f3fc6 100644 --- a/activerecord/lib/active_record/transactions.rb +++ b/activerecord/lib/active_record/transactions.rb @@ -11,15 +11,16 @@ module ActiveRecord :before_commit_without_transaction_enrollment, :commit_without_transaction_enrollment, :rollback_without_transaction_enrollment, + terminator: deprecated_false_terminator, scope: [:kind, :name] end # = Active Record Transactions # - # Transactions are protective blocks where SQL statements are only permanent + # \Transactions are protective blocks where SQL statements are only permanent # if they can all succeed as one atomic action. The classic example is a # transfer between two accounts where you can only have a deposit if the - # withdrawal succeeded and vice versa. Transactions enforce the integrity of + # withdrawal succeeded and vice versa. \Transactions enforce the integrity of # the database and guard the data against program errors or database # break-downs. So basically you should use transaction blocks whenever you # have a number of statements that must be executed together or not at all. @@ -39,20 +40,20 @@ module ActiveRecord # # == Different Active Record classes in a single transaction # - # Though the transaction class method is called on some Active Record class, + # Though the #transaction class method is called on some Active Record class, # the objects within the transaction block need not all be instances of # that class. This is because transactions are per-database connection, not # per-model. # # In this example a +balance+ record is transactionally saved even - # though +transaction+ is called on the +Account+ class: + # though #transaction is called on the +Account+ class: # # Account.transaction do # balance.save! # account.save! # end # - # The +transaction+ method is also available as a model instance method. + # The #transaction method is also available as a model instance method. # For example, you can also do this: # # balance.transaction do @@ -79,7 +80,8 @@ module ActiveRecord # # == +save+ and +destroy+ are automatically wrapped in a transaction # - # Both +save+ and +destroy+ come wrapped in a transaction that ensures + # Both {#save}[rdoc-ref:Persistence#save] and + # {#destroy}[rdoc-ref:Persistence#destroy] come wrapped in a transaction that ensures # that whatever you do in validations or callbacks will happen under its # protected cover. So you can use validations to check for values that # the transaction depends on or you can raise exceptions in the callbacks @@ -88,7 +90,7 @@ module ActiveRecord # As a consequence changes to the database are not seen outside your connection # until the operation is complete. For example, if you try to update the index # of a search engine in +after_save+ the indexer won't see the updated record. - # The +after_commit+ callback is the only one that is triggered once the update + # The #after_commit callback is the only one that is triggered once the update # is committed. See below. # # == Exception handling and rolling back @@ -97,11 +99,11 @@ module ActiveRecord # be propagated (after triggering the ROLLBACK), so you should be ready to # catch those in your application code. # - # One exception is the <tt>ActiveRecord::Rollback</tt> exception, which will trigger + # One exception is the ActiveRecord::Rollback exception, which will trigger # a ROLLBACK when raised, but not be re-raised by the transaction block. # - # *Warning*: one should not catch <tt>ActiveRecord::StatementInvalid</tt> exceptions - # inside a transaction block. <tt>ActiveRecord::StatementInvalid</tt> exceptions indicate that an + # *Warning*: one should not catch ActiveRecord::StatementInvalid exceptions + # inside a transaction block. ActiveRecord::StatementInvalid exceptions indicate that an # error occurred at the database level, for example when a unique constraint # is violated. On some database systems, such as PostgreSQL, database errors # inside a transaction cause the entire transaction to become unusable @@ -127,11 +129,11 @@ module ActiveRecord # end # # One should restart the entire transaction if an - # <tt>ActiveRecord::StatementInvalid</tt> occurred. + # ActiveRecord::StatementInvalid occurred. # # == Nested transactions # - # +transaction+ calls can be nested. By default, this makes all database + # #transaction calls can be nested. By default, this makes all database # statements in the nested transaction block become part of the parent # transaction. For example, the following behavior may be surprising: # @@ -143,7 +145,7 @@ module ActiveRecord # end # end # - # creates both "Kotori" and "Nemu". Reason is the <tt>ActiveRecord::Rollback</tt> + # creates both "Kotori" and "Nemu". Reason is the ActiveRecord::Rollback # exception in the nested block does not issue a ROLLBACK. Since these exceptions # are captured in transaction blocks, the parent block does not see it and the # real transaction is committed. @@ -167,22 +169,22 @@ module ActiveRecord # writing, the only database that we're aware of that supports true nested # transactions, is MS-SQL. Because of this, Active Record emulates nested # transactions by using savepoints on MySQL and PostgreSQL. See - # http://dev.mysql.com/doc/refman/5.6/en/savepoint.html + # http://dev.mysql.com/doc/refman/5.7/en/savepoint.html # for more information about savepoints. # - # === Callbacks + # === \Callbacks # # There are two types of callbacks associated with committing and rolling back transactions: - # +after_commit+ and +after_rollback+. + # #after_commit and #after_rollback. # - # +after_commit+ callbacks are called on every record saved or destroyed within a - # transaction immediately after the transaction is committed. +after_rollback+ callbacks + # #after_commit callbacks are called on every record saved or destroyed within a + # transaction immediately after the transaction is committed. #after_rollback callbacks # are called on every record saved or destroyed within a transaction immediately after the # transaction or savepoint is rolled back. # # These callbacks are useful for interacting with other systems since you will be guaranteed # that the callback is only executed when the database is in a permanent state. For example, - # +after_commit+ is a good spot to put in a hook to clearing a cache since clearing it from + # #after_commit is a good spot to put in a hook to clearing a cache since clearing it from # within a transaction could trigger the cache to be regenerated before the database is updated. # # === Caveats @@ -196,17 +198,16 @@ module ActiveRecord # automatically released. The following example demonstrates the problem: # # Model.connection.transaction do # BEGIN - # Model.connection.transaction(requires_new: true) do # CREATE SAVEPOINT active_record_1 + # Model.connection.transaction(requires_new: true) do # CREATE SAVEPOINT active_record_1 # Model.connection.create_table(...) # active_record_1 now automatically released - # end # RELEASE savepoint active_record_1 + # end # RELEASE SAVEPOINT active_record_1 # # ^^^^ BOOM! database error! # end # # Note that "TRUNCATE" is also a MySQL DDL statement! module ClassMethods - # See ActiveRecord::Transactions::ClassMethods for detailed documentation. + # See the ConnectionAdapters::DatabaseStatements#transaction API docs. def transaction(options = {}, &block) - # See the ConnectionAdapters::DatabaseStatements#transaction API docs. connection.transaction(options, &block) end @@ -232,9 +233,27 @@ module ActiveRecord set_callback(:commit, :after, *args, &block) end + # Shortcut for +after_commit :hook, on: :create+. + def after_create_commit(*args, &block) + set_options_for_callbacks!(args, on: :create) + set_callback(:commit, :after, *args, &block) + end + + # Shortcut for +after_commit :hook, on: :update+. + def after_update_commit(*args, &block) + set_options_for_callbacks!(args, on: :update) + set_callback(:commit, :after, *args, &block) + end + + # Shortcut for +after_commit :hook, on: :destroy+. + def after_destroy_commit(*args, &block) + set_options_for_callbacks!(args, on: :destroy) + set_callback(:commit, :after, *args, &block) + end + # This callback is called after a create, update, or destroy are rolled back. # - # Please check the documentation of +after_commit+ for options. + # Please check the documentation of #after_commit for options. def after_rollback(*args, &block) set_options_for_callbacks!(args) set_callback(:rollback, :after, *args, &block) @@ -267,9 +286,11 @@ module ActiveRecord private - def set_options_for_callbacks!(args) - options = args.last - if options.is_a?(Hash) && options[:on] + def set_options_for_callbacks!(args, enforced_options = {}) + options = args.extract_options!.merge!(enforced_options) + args << options + + if options[:on] fire_on = Array(options[:on]) assert_valid_transaction_action(fire_on) options[:if] = Array(options[:if]) @@ -319,36 +340,36 @@ module ActiveRecord end def before_committed! # :nodoc: - run_callbacks :before_commit_without_transaction_enrollment - run_callbacks :before_commit + _run_before_commit_without_transaction_enrollment_callbacks + _run_before_commit_callbacks end - # Call the +after_commit+ callbacks. + # Call the #after_commit callbacks. # # Ensure that it is not called if the object was never persisted (failed create), # but call it after the commit of a destroyed object. def committed!(should_run_callbacks: true) #:nodoc: if should_run_callbacks && destroyed? || persisted? - run_callbacks :commit_without_transaction_enrollment - run_callbacks :commit + _run_commit_without_transaction_enrollment_callbacks + _run_commit_callbacks end ensure force_clear_transaction_record_state end - # Call the +after_rollback+ callbacks. The +force_restore_state+ argument indicates if the record + # Call the #after_rollback callbacks. The +force_restore_state+ argument indicates if the record # state should be rolled back to the beginning or just to the last savepoint. def rolledback!(force_restore_state: false, should_run_callbacks: true) #:nodoc: if should_run_callbacks - run_callbacks :rollback - run_callbacks :rollback_without_transaction_enrollment + _run_rollback_callbacks + _run_rollback_without_transaction_enrollment_callbacks end ensure restore_transaction_record_state(force_restore_state) clear_transaction_record_state end - # Add the record to the current transaction so that the +after_rollback+ and +after_commit+ callbacks + # Add the record to the current transaction so that the #after_rollback and #after_commit callbacks # can be called. def add_to_transaction if has_transactional_callbacks? @@ -380,6 +401,10 @@ module ActiveRecord raise ActiveRecord::Rollback unless status end status + ensure + if @transaction_state && @transaction_state.committed? + clear_transaction_record_state + end end protected @@ -453,23 +478,23 @@ module ActiveRecord !_rollback_callbacks.empty? || !_commit_callbacks.empty? || !_before_commit_callbacks.empty? end - # Updates the attributes on this particular ActiveRecord object so that - # if it's associated with a transaction, then the state of the ActiveRecord + # Updates the attributes on this particular Active Record object so that + # if it's associated with a transaction, then the state of the Active Record # object will be updated to reflect the current state of the transaction # - # The @transaction_state variable stores the states of the associated + # The +@transaction_state+ variable stores the states of the associated # transaction. This relies on the fact that a transaction can only be in # one rollback or commit (otherwise a list of states would be required) - # Each ActiveRecord object inside of a transaction carries that transaction's + # Each Active Record object inside of a transaction carries that transaction's # TransactionState. # # This method checks to see if the ActiveRecord object's state reflects - # the TransactionState, and rolls back or commits the ActiveRecord object + # the TransactionState, and rolls back or commits the Active Record object # as appropriate. # - # Since ActiveRecord objects can be inside multiple transactions, this + # Since Active Record objects can be inside multiple transactions, this # method recursively goes through the parent of the TransactionState and - # checks if the ActiveRecord object reflects the state of the object. + # checks if the Active Record object reflects the state of the object. def sync_with_transaction_state update_attributes_from_transaction_state(@transaction_state) end diff --git a/activerecord/lib/active_record/type.rb b/activerecord/lib/active_record/type.rb index 2c0cda69d0..e210e94f00 100644 --- a/activerecord/lib/active_record/type.rb +++ b/activerecord/lib/active_record/type.rb @@ -1,22 +1,15 @@ -require 'active_record/type/helpers' -require 'active_record/type/value' +require 'active_model/type' + +require 'active_record/type/internal/abstract_json' +require 'active_record/type/internal/timezone' -require 'active_record/type/big_integer' -require 'active_record/type/binary' -require 'active_record/type/boolean' require 'active_record/type/date' require 'active_record/type/date_time' -require 'active_record/type/decimal' -require 'active_record/type/decimal_without_scale' -require 'active_record/type/float' -require 'active_record/type/integer' -require 'active_record/type/serialized' -require 'active_record/type/string' -require 'active_record/type/text' require 'active_record/type/time' -require 'active_record/type/unsigned_integer' +require 'active_record/type/serialized' require 'active_record/type/adapter_specific_registry' + require 'active_record/type/type_map' require 'active_record/type/hash_lookup_type_map' @@ -29,13 +22,13 @@ module ActiveRecord delegate :add_modifier, to: :registry # Add a new type to the registry, allowing it to be referenced as a - # symbol by ActiveRecord::Attributes::ClassMethods#attribute. If your - # type is only meant to be used with a specific database adapter, you can - # do so by passing +adapter: :postgresql+. If your type has the same + # symbol by {ActiveRecord::Base.attribute}[rdoc-ref:Attributes::ClassMethods#attribute]. + # If your type is only meant to be used with a specific database adapter, you can + # do so by passing <tt>adapter: :postgresql</tt>. If your type has the same # name as a native type for the current adapter, an exception will be - # raised unless you specify an +:override+ option. +override: true+ will - # cause your type to be used instead of the native type. +override: - # false+ will cause the native type to be used over yours if one exists. + # raised unless you specify an +:override+ option. <tt>override: true</tt> will + # cause your type to be used instead of the native type. <tt>override: + # false</tt> will cause the native type to be used over yours if one exists. def register(type_name, klass = nil, **options, &block) registry.register(type_name, klass, **options, &block) end @@ -51,6 +44,19 @@ module ActiveRecord end end + Helpers = ActiveModel::Type::Helpers + BigInteger = ActiveModel::Type::BigInteger + Binary = ActiveModel::Type::Binary + Boolean = ActiveModel::Type::Boolean + Decimal = ActiveModel::Type::Decimal + DecimalWithoutScale = ActiveModel::Type::DecimalWithoutScale + Float = ActiveModel::Type::Float + Integer = ActiveModel::Type::Integer + String = ActiveModel::Type::String + Text = ActiveModel::Type::Text + UnsignedInteger = ActiveModel::Type::UnsignedInteger + Value = ActiveModel::Type::Value + register(:big_integer, Type::BigInteger, override: false) register(:binary, Type::Binary, override: false) register(:boolean, Type::Boolean, override: false) diff --git a/activerecord/lib/active_record/type/adapter_specific_registry.rb b/activerecord/lib/active_record/type/adapter_specific_registry.rb index 5f71b3cb94..d440eac619 100644 --- a/activerecord/lib/active_record/type/adapter_specific_registry.rb +++ b/activerecord/lib/active_record/type/adapter_specific_registry.rb @@ -1,35 +1,24 @@ +require 'active_model/type/registry' + module ActiveRecord # :stopdoc: module Type - class AdapterSpecificRegistry - def initialize - @registrations = [] - end - - def register(type_name, klass = nil, **options, &block) - block ||= proc { |_, *args| klass.new(*args) } - registrations << Registration.new(type_name, block, **options) + class AdapterSpecificRegistry < ActiveModel::Type::Registry + def add_modifier(options, klass, **args) + registrations << DecorationRegistration.new(options, klass, **args) end - def lookup(symbol, *args) - registration = registrations - .select { |r| r.matches?(symbol, *args) } - .max + private - if registration - registration.call(self, symbol, *args) - else - raise ArgumentError, "Unknown type #{symbol.inspect}" - end + def registration_klass + Registration end - def add_modifier(options, klass, **args) - registrations << DecorationRegistration.new(options, klass, **args) + def find_registration(symbol, *args) + registrations + .select { |registration| registration.matches?(symbol, *args) } + .max end - - protected - - attr_reader :registrations end class Registration @@ -137,6 +126,5 @@ module ActiveRecord class TypeConflictError < StandardError end - # :startdoc: end diff --git a/activerecord/lib/active_record/type/big_integer.rb b/activerecord/lib/active_record/type/big_integer.rb deleted file mode 100644 index 0c72d8914f..0000000000 --- a/activerecord/lib/active_record/type/big_integer.rb +++ /dev/null @@ -1,13 +0,0 @@ -require 'active_record/type/integer' - -module ActiveRecord - module Type - class BigInteger < Integer # :nodoc: - private - - def max_value - ::Float::INFINITY - end - end - end -end diff --git a/activerecord/lib/active_record/type/binary.rb b/activerecord/lib/active_record/type/binary.rb deleted file mode 100644 index 0baf8c63ad..0000000000 --- a/activerecord/lib/active_record/type/binary.rb +++ /dev/null @@ -1,50 +0,0 @@ -module ActiveRecord - module Type - class Binary < Value # :nodoc: - def type - :binary - end - - def binary? - true - end - - def cast(value) - if value.is_a?(Data) - value.to_s - else - super - end - end - - def serialize(value) - return if value.nil? - Data.new(super) - end - - def changed_in_place?(raw_old_value, value) - old_value = deserialize(raw_old_value) - old_value != value - end - - class Data # :nodoc: - def initialize(value) - @value = value.to_s - end - - def to_s - @value - end - alias_method :to_str, :to_s - - def hex - @value.unpack('H*')[0] - end - - def ==(other) - other == to_s || super - end - end - end - end -end diff --git a/activerecord/lib/active_record/type/boolean.rb b/activerecord/lib/active_record/type/boolean.rb deleted file mode 100644 index f6a75512fd..0000000000 --- a/activerecord/lib/active_record/type/boolean.rb +++ /dev/null @@ -1,19 +0,0 @@ -module ActiveRecord - module Type - class Boolean < Value # :nodoc: - def type - :boolean - end - - private - - def cast_value(value) - if value == '' - nil - else - !ConnectionAdapters::Column::FALSE_VALUES.include?(value) - end - end - end - end -end diff --git a/activerecord/lib/active_record/type/date.rb b/activerecord/lib/active_record/type/date.rb index 3ceab59ebb..ccafed054e 100644 --- a/activerecord/lib/active_record/type/date.rb +++ b/activerecord/lib/active_record/type/date.rb @@ -1,49 +1,7 @@ module ActiveRecord module Type - class Date < Value # :nodoc: - include Helpers::AcceptsMultiparameterTime.new - - def type - :date - end - - def type_cast_for_schema(value) - "'#{value.to_s(:db)}'" - end - - private - - def cast_value(value) - if value.is_a?(::String) - return if value.empty? - fast_string_to_date(value) || fallback_string_to_date(value) - elsif value.respond_to?(:to_date) - value.to_date - else - value - end - end - - def fast_string_to_date(string) - if string =~ ConnectionAdapters::Column::Format::ISO_DATE - new_date $1.to_i, $2.to_i, $3.to_i - end - end - - def fallback_string_to_date(string) - new_date(*::Date._parse(string, false).values_at(:year, :mon, :mday)) - end - - def new_date(year, mon, mday) - if year && year != 0 - ::Date.new(year, mon, mday) rescue nil - end - end - - def value_from_multiparameter_assignment(*) - time = super - time && time.to_date - end + class Date < ActiveModel::Type::Date + include Internal::Timezone end end end diff --git a/activerecord/lib/active_record/type/date_time.rb b/activerecord/lib/active_record/type/date_time.rb index a5199959b9..1fb9380ecd 100644 --- a/activerecord/lib/active_record/type/date_time.rb +++ b/activerecord/lib/active_record/type/date_time.rb @@ -1,44 +1,7 @@ module ActiveRecord module Type - class DateTime < Value # :nodoc: - include Helpers::TimeValue - include Helpers::AcceptsMultiparameterTime.new( - defaults: { 4 => 0, 5 => 0 } - ) - - def type - :datetime - end - - private - - def cast_value(string) - return string unless string.is_a?(::String) - return if string.empty? - - fast_string_to_time(string) || fallback_string_to_time(string) - end - - # '0.123456' -> 123456 - # '1.123456' -> 123456 - def microseconds(time) - time[:sec_fraction] ? (time[:sec_fraction] * 1_000_000).to_i : 0 - end - - def fallback_string_to_time(string) - time_hash = ::Date._parse(string) - time_hash[:sec_fraction] = microseconds(time_hash) - - new_time(*time_hash.values_at(:year, :mon, :mday, :hour, :min, :sec, :sec_fraction, :offset)) - end - - def value_from_multiparameter_assignment(values_hash) - missing_parameter = (1..3).detect { |key| !values_hash.key?(key) } - if missing_parameter - raise ArgumentError, missing_parameter - end - super - end + class DateTime < ActiveModel::Type::DateTime + include Internal::Timezone end end end diff --git a/activerecord/lib/active_record/type/decimal.rb b/activerecord/lib/active_record/type/decimal.rb deleted file mode 100644 index 867b5f75c7..0000000000 --- a/activerecord/lib/active_record/type/decimal.rb +++ /dev/null @@ -1,48 +0,0 @@ -module ActiveRecord - module Type - class Decimal < Value # :nodoc: - include Helpers::Numeric - - def type - :decimal - end - - def type_cast_for_schema(value) - value.to_s - end - - private - - def cast_value(value) - case value - when ::Float - convert_float_to_big_decimal(value) - when ::Numeric, ::String - BigDecimal(value, precision.to_i) - else - if value.respond_to?(:to_d) - value.to_d - else - cast_value(value.to_s) - end - end - end - - def convert_float_to_big_decimal(value) - if precision - BigDecimal(value, float_precision) - else - value.to_d - end - end - - def float_precision - if precision.to_i > ::Float::DIG + 1 - ::Float::DIG + 1 - else - precision.to_i - end - end - end - end -end diff --git a/activerecord/lib/active_record/type/decimal_without_scale.rb b/activerecord/lib/active_record/type/decimal_without_scale.rb deleted file mode 100644 index ff5559e300..0000000000 --- a/activerecord/lib/active_record/type/decimal_without_scale.rb +++ /dev/null @@ -1,11 +0,0 @@ -require 'active_record/type/big_integer' - -module ActiveRecord - module Type - class DecimalWithoutScale < BigInteger # :nodoc: - def type - :decimal - end - end - end -end diff --git a/activerecord/lib/active_record/type/float.rb b/activerecord/lib/active_record/type/float.rb deleted file mode 100644 index d88482b85d..0000000000 --- a/activerecord/lib/active_record/type/float.rb +++ /dev/null @@ -1,25 +0,0 @@ -module ActiveRecord - module Type - class Float < Value # :nodoc: - include Helpers::Numeric - - def type - :float - end - - alias serialize cast - - private - - def cast_value(value) - case value - when ::Float then value - when "Infinity" then ::Float::INFINITY - when "-Infinity" then -::Float::INFINITY - when "NaN" then ::Float::NAN - else value.to_f - end - end - end - end -end diff --git a/activerecord/lib/active_record/type/helpers.rb b/activerecord/lib/active_record/type/helpers.rb deleted file mode 100644 index 634d417d13..0000000000 --- a/activerecord/lib/active_record/type/helpers.rb +++ /dev/null @@ -1,4 +0,0 @@ -require 'active_record/type/helpers/accepts_multiparameter_time' -require 'active_record/type/helpers/numeric' -require 'active_record/type/helpers/mutable' -require 'active_record/type/helpers/time_value' diff --git a/activerecord/lib/active_record/type/helpers/accepts_multiparameter_time.rb b/activerecord/lib/active_record/type/helpers/accepts_multiparameter_time.rb deleted file mode 100644 index be571fc1c7..0000000000 --- a/activerecord/lib/active_record/type/helpers/accepts_multiparameter_time.rb +++ /dev/null @@ -1,30 +0,0 @@ -module ActiveRecord - module Type - module Helpers - class AcceptsMultiparameterTime < Module # :nodoc: - def initialize(defaults: {}) - define_method(:cast) do |value| - if value.is_a?(Hash) - value_from_multiparameter_assignment(value) - else - super(value) - end - end - - define_method(:value_from_multiparameter_assignment) do |values_hash| - defaults.each do |k, v| - values_hash[k] ||= v - end - return unless values_hash[1] && values_hash[2] && values_hash[3] - values = values_hash.sort.map(&:last) - ::Time.send( - ActiveRecord::Base.default_timezone, - *values - ) - end - private :value_from_multiparameter_assignment - end - end - end - end -end diff --git a/activerecord/lib/active_record/type/helpers/mutable.rb b/activerecord/lib/active_record/type/helpers/mutable.rb deleted file mode 100644 index 88a9099277..0000000000 --- a/activerecord/lib/active_record/type/helpers/mutable.rb +++ /dev/null @@ -1,18 +0,0 @@ -module ActiveRecord - module Type - module Helpers - module Mutable # :nodoc: - def cast(value) - deserialize(serialize(value)) - end - - # +raw_old_value+ will be the `_before_type_cast` version of the - # value (likely a string). +new_value+ will be the current, type - # cast value. - def changed_in_place?(raw_old_value, new_value) - raw_old_value != serialize(new_value) - end - end - end - end -end diff --git a/activerecord/lib/active_record/type/helpers/numeric.rb b/activerecord/lib/active_record/type/helpers/numeric.rb deleted file mode 100644 index a755a02a59..0000000000 --- a/activerecord/lib/active_record/type/helpers/numeric.rb +++ /dev/null @@ -1,34 +0,0 @@ -module ActiveRecord - module Type - module Helpers - module Numeric # :nodoc: - def cast(value) - value = case value - when true then 1 - when false then 0 - when ::String then value.presence - else value - end - super(value) - end - - def changed?(old_value, _new_value, new_value_before_type_cast) # :nodoc: - super || number_to_non_number?(old_value, new_value_before_type_cast) - end - - private - - def number_to_non_number?(old_value, new_value_before_type_cast) - old_value != nil && non_numeric_string?(new_value_before_type_cast) - end - - def non_numeric_string?(value) - # 'wibble'.to_i will give zero, we want to make sure - # that we aren't marking int zero to string zero as - # changed. - value.to_s !~ /\A-?\d+\.?\d*\z/ - end - end - end - end -end diff --git a/activerecord/lib/active_record/type/helpers/time_value.rb b/activerecord/lib/active_record/type/helpers/time_value.rb deleted file mode 100644 index 7eb41557cb..0000000000 --- a/activerecord/lib/active_record/type/helpers/time_value.rb +++ /dev/null @@ -1,58 +0,0 @@ -module ActiveRecord - module Type - module Helpers - module TimeValue # :nodoc: - def serialize(value) - if precision && value.respond_to?(:usec) - number_of_insignificant_digits = 6 - precision - round_power = 10 ** number_of_insignificant_digits - value = value.change(usec: value.usec / round_power * round_power) - end - - if value.acts_like?(:time) - zone_conversion_method = ActiveRecord::Base.default_timezone == :utc ? :getutc : :getlocal - - if value.respond_to?(zone_conversion_method) - value = value.send(zone_conversion_method) - end - end - - value - end - - def type_cast_for_schema(value) - "'#{value.to_s(:db)}'" - end - - def user_input_in_time_zone(value) - value.in_time_zone - end - - private - - def new_time(year, mon, mday, hour, min, sec, microsec, offset = nil) - # Treat 0000-00-00 00:00:00 as nil. - return if year.nil? || (year == 0 && mon == 0 && mday == 0) - - if offset - time = ::Time.utc(year, mon, mday, hour, min, sec, microsec) rescue nil - return unless time - - time -= offset - Base.default_timezone == :utc ? time : time.getlocal - else - ::Time.public_send(Base.default_timezone, year, mon, mday, hour, min, sec, microsec) rescue nil - end - end - - # Doesn't handle time zones. - def fast_string_to_time(string) - if string =~ ConnectionAdapters::Column::Format::ISO_DATETIME - microsec = ($7.to_r * 1_000_000).to_i - new_time $1.to_i, $2.to_i, $3.to_i, $4.to_i, $5.to_i, $6.to_i, microsec - end - end - end - end - end -end diff --git a/activerecord/lib/active_record/type/integer.rb b/activerecord/lib/active_record/type/integer.rb deleted file mode 100644 index c5040c6d3b..0000000000 --- a/activerecord/lib/active_record/type/integer.rb +++ /dev/null @@ -1,66 +0,0 @@ -module ActiveRecord - module Type - class Integer < Value # :nodoc: - include Helpers::Numeric - - # Column storage size in bytes. - # 4 bytes means a MySQL int or Postgres integer as opposed to smallint etc. - DEFAULT_LIMIT = 4 - - def initialize(*) - super - @range = min_value...max_value - end - - def type - :integer - end - - def deserialize(value) - return if value.nil? - value.to_i - end - - def serialize(value) - result = cast(value) - if result - ensure_in_range(result) - end - result - end - - protected - - attr_reader :range - - private - - def cast_value(value) - case value - when true then 1 - when false then 0 - else - value.to_i rescue nil - end - end - - def ensure_in_range(value) - unless range.cover?(value) - raise RangeError, "#{value} is out of range for #{self.class} with limit #{_limit}" - end - end - - def max_value - 1 << (_limit * 8 - 1) # 8 bits per byte with one bit for sign - end - - def min_value - -max_value - end - - def _limit - self.limit || DEFAULT_LIMIT - end - end - end -end diff --git a/activerecord/lib/active_record/type/internal/abstract_json.rb b/activerecord/lib/active_record/type/internal/abstract_json.rb new file mode 100644 index 0000000000..097d1bd363 --- /dev/null +++ b/activerecord/lib/active_record/type/internal/abstract_json.rb @@ -0,0 +1,33 @@ +module ActiveRecord + module Type + module Internal # :nodoc: + class AbstractJson < ActiveModel::Type::Value # :nodoc: + include ActiveModel::Type::Helpers::Mutable + + def type + :json + end + + def deserialize(value) + if value.is_a?(::String) + ::ActiveSupport::JSON.decode(value) rescue nil + else + value + end + end + + def serialize(value) + if value.is_a?(::Array) || value.is_a?(::Hash) + ::ActiveSupport::JSON.encode(value) + else + value + end + end + + def accessor + ActiveRecord::Store::StringKeyedHashAccessor + end + end + end + end +end diff --git a/activerecord/lib/active_record/type/internal/timezone.rb b/activerecord/lib/active_record/type/internal/timezone.rb new file mode 100644 index 0000000000..947e06158a --- /dev/null +++ b/activerecord/lib/active_record/type/internal/timezone.rb @@ -0,0 +1,15 @@ +module ActiveRecord + module Type + module Internal + module Timezone + def is_utc? + ActiveRecord::Base.default_timezone == :utc + end + + def default_timezone + ActiveRecord::Base.default_timezone + end + end + end + end +end diff --git a/activerecord/lib/active_record/type/serialized.rb b/activerecord/lib/active_record/type/serialized.rb index ea3e0d6a45..4ff0740cfb 100644 --- a/activerecord/lib/active_record/type/serialized.rb +++ b/activerecord/lib/active_record/type/serialized.rb @@ -1,7 +1,7 @@ module ActiveRecord module Type - class Serialized < DelegateClass(Type::Value) # :nodoc: - include Helpers::Mutable + class Serialized < DelegateClass(ActiveModel::Type::Value) # :nodoc: + include ActiveModel::Type::Helpers::Mutable attr_reader :subtype, :coder @@ -41,6 +41,12 @@ module ActiveRecord ActiveRecord::Store::IndifferentHashAccessor end + def assert_valid_value(value) + if coder.respond_to?(:assert_valid_value) + coder.assert_valid_value(value) + end + end + private def default_value?(value) diff --git a/activerecord/lib/active_record/type/string.rb b/activerecord/lib/active_record/type/string.rb deleted file mode 100644 index 2662b7e874..0000000000 --- a/activerecord/lib/active_record/type/string.rb +++ /dev/null @@ -1,36 +0,0 @@ -module ActiveRecord - module Type - class String < Value # :nodoc: - def type - :string - end - - def changed_in_place?(raw_old_value, new_value) - if new_value.is_a?(::String) - raw_old_value != new_value - end - end - - def serialize(value) - case value - when ::Numeric, ActiveSupport::Duration then value.to_s - when ::String then ::String.new(value) - when true then "t" - when false then "f" - else super - end - end - - private - - def cast_value(value) - case value - when true then "t" - when false then "f" - # String.new is slightly faster than dup - else ::String.new(value.to_s) - end - end - end - end -end diff --git a/activerecord/lib/active_record/type/text.rb b/activerecord/lib/active_record/type/text.rb deleted file mode 100644 index 26f980f060..0000000000 --- a/activerecord/lib/active_record/type/text.rb +++ /dev/null @@ -1,11 +0,0 @@ -require 'active_record/type/string' - -module ActiveRecord - module Type - class Text < String # :nodoc: - def type - :text - end - end - end -end diff --git a/activerecord/lib/active_record/type/time.rb b/activerecord/lib/active_record/type/time.rb index 19a10021bc..70988d84ff 100644 --- a/activerecord/lib/active_record/type/time.rb +++ b/activerecord/lib/active_record/type/time.rb @@ -1,42 +1,8 @@ module ActiveRecord module Type - class Time < Value # :nodoc: - include Helpers::TimeValue - include Helpers::AcceptsMultiparameterTime.new( - defaults: { 1 => 1970, 2 => 1, 3 => 1, 4 => 0, 5 => 0 } - ) - - def type - :time - end - - def user_input_in_time_zone(value) - return unless value.present? - - case value - when ::String - value = "2000-01-01 #{value}" - when ::Time - value = value.change(year: 2000, day: 1, month: 1) - end - - super(value) - end - - private - - def cast_value(value) - return value unless value.is_a?(::String) - return if value.empty? - - dummy_time_value = "2000-01-01 #{value}" - - fast_string_to_time(dummy_time_value) || begin - time_hash = ::Date._parse(dummy_time_value) - return if time_hash[:hour].nil? - new_time(*time_hash.values_at(:year, :mon, :mday, :hour, :min, :sec, :sec_fraction)) - end - end + class Time < ActiveModel::Type::Time + include Internal::Timezone end end end + diff --git a/activerecord/lib/active_record/type/type_map.rb b/activerecord/lib/active_record/type/type_map.rb index 09f5ba6b74..850a7a4e09 100644 --- a/activerecord/lib/active_record/type/type_map.rb +++ b/activerecord/lib/active_record/type/type_map.rb @@ -1,12 +1,12 @@ -require 'thread_safe' +require 'concurrent/map' module ActiveRecord module Type class TypeMap # :nodoc: def initialize @mapping = {} - @cache = ThreadSafe::Cache.new do |h, key| - h.fetch_or_store(key, ThreadSafe::Cache.new) + @cache = Concurrent::Map.new do |h, key| + h.fetch_or_store(key, Concurrent::Map.new) end end @@ -57,7 +57,7 @@ module ActiveRecord end def default_value - @default_value ||= Value.new + @default_value ||= ActiveModel::Type::Value.new end end end diff --git a/activerecord/lib/active_record/type/unsigned_integer.rb b/activerecord/lib/active_record/type/unsigned_integer.rb deleted file mode 100644 index ed3e527483..0000000000 --- a/activerecord/lib/active_record/type/unsigned_integer.rb +++ /dev/null @@ -1,15 +0,0 @@ -module ActiveRecord - module Type - class UnsignedInteger < Integer # :nodoc: - private - - def max_value - super * 2 - end - - def min_value - 0 - end - end - end -end diff --git a/activerecord/lib/active_record/type/value.rb b/activerecord/lib/active_record/type/value.rb deleted file mode 100644 index 6b9d147ecc..0000000000 --- a/activerecord/lib/active_record/type/value.rb +++ /dev/null @@ -1,104 +0,0 @@ -module ActiveRecord - module Type - class Value - attr_reader :precision, :scale, :limit - - def initialize(precision: nil, limit: nil, scale: nil) - @precision = precision - @scale = scale - @limit = limit - end - - def type # :nodoc: - end - - # Converts a value from database input to the appropriate ruby type. The - # return value of this method will be returned from - # ActiveRecord::AttributeMethods::Read#read_attribute. The default - # implementation just calls Value#cast. - # - # +value+ The raw input, as provided from the database. - def deserialize(value) - cast(value) - end - - # Type casts a value from user input (e.g. from a setter). This value may - # be a string from the form builder, or a ruby object passed to a setter. - # There is currently no way to differentiate between which source it came - # from. - # - # The return value of this method will be returned from - # ActiveRecord::AttributeMethods::Read#read_attribute. See also: - # Value#cast_value. - # - # +value+ The raw input, as provided to the attribute setter. - def cast(value) - cast_value(value) unless value.nil? - end - - # Casts a value from the ruby type to a type that the database knows how - # to understand. The returned value from this method should be a - # +String+, +Numeric+, +Date+, +Time+, +Symbol+, +true+, +false+, or - # +nil+. - def serialize(value) - value - end - - # Type casts a value for schema dumping. This method is private, as we are - # hoping to remove it entirely. - def type_cast_for_schema(value) # :nodoc: - value.inspect - end - - # These predicates are not documented, as I need to look further into - # their use, and see if they can be removed entirely. - def binary? # :nodoc: - false - end - - # Determines whether a value has changed for dirty checking. +old_value+ - # and +new_value+ will always be type-cast. Types should not need to - # override this method. - def changed?(old_value, new_value, _new_value_before_type_cast) - old_value != new_value - end - - # Determines whether the mutable value has been modified since it was - # read. Returns +false+ by default. If your type returns an object - # which could be mutated, you should override this method. You will need - # to either: - # - # - pass +new_value+ to Value#serialize and compare it to - # +raw_old_value+ - # - # or - # - # - pass +raw_old_value+ to Value#deserialize and compare it to - # +new_value+ - # - # +raw_old_value+ The original value, before being passed to - # +deserialize+. - # - # +new_value+ The current value, after type casting. - def changed_in_place?(raw_old_value, new_value) - false - end - - def ==(other) - self.class == other.class && - precision == other.precision && - scale == other.scale && - limit == other.limit - end - - private - - # Convenience method for types which do not need separate type casting - # behavior for user and database inputs. Called by Value#cast for - # values except +nil+. - def cast_value(value) # :doc: - value - end - end - end -end diff --git a/activerecord/lib/active_record/type_caster.rb b/activerecord/lib/active_record/type_caster.rb index 63ba10c289..accc339d00 100644 --- a/activerecord/lib/active_record/type_caster.rb +++ b/activerecord/lib/active_record/type_caster.rb @@ -2,6 +2,6 @@ require 'active_record/type_caster/map' require 'active_record/type_caster/connection' module ActiveRecord - module TypeCaster + module TypeCaster # :nodoc: end end diff --git a/activerecord/lib/active_record/type_caster/connection.rb b/activerecord/lib/active_record/type_caster/connection.rb index 3878270770..7ed8dcc313 100644 --- a/activerecord/lib/active_record/type_caster/connection.rb +++ b/activerecord/lib/active_record/type_caster/connection.rb @@ -1,6 +1,6 @@ module ActiveRecord module TypeCaster - class Connection + class Connection # :nodoc: def initialize(klass, table_name) @klass = klass @table_name = table_name @@ -20,7 +20,7 @@ module ActiveRecord private def column_for(attribute_name) - if connection.schema_cache.table_exists?(table_name) + if connection.schema_cache.data_source_exists?(table_name) connection.schema_cache.columns_hash(table_name)[attribute_name.to_s] end end diff --git a/activerecord/lib/active_record/type_caster/map.rb b/activerecord/lib/active_record/type_caster/map.rb index 4b1941351c..3a367b3999 100644 --- a/activerecord/lib/active_record/type_caster/map.rb +++ b/activerecord/lib/active_record/type_caster/map.rb @@ -1,6 +1,6 @@ module ActiveRecord module TypeCaster - class Map + class Map # :nodoc: def initialize(types) @types = types end diff --git a/activerecord/lib/active_record/validations.rb b/activerecord/lib/active_record/validations.rb index e227212827..6677e6dc5f 100644 --- a/activerecord/lib/active_record/validations.rb +++ b/activerecord/lib/active_record/validations.rb @@ -1,8 +1,9 @@ module ActiveRecord - # = Active Record RecordInvalid + # = Active Record \RecordInvalid # - # Raised by <tt>save!</tt> and <tt>create!</tt> when the record is invalid. Use the - # +record+ method to retrieve the record which did not validate. + # Raised by {ActiveRecord::Base#save!}[rdoc-ref:Persistence#save!] and + # {ActiveRecord::Base#create!}[rdoc-ref:Persistence::ClassMethods#create!] when the record is invalid. + # Use the #record method to retrieve the record which did not validate. # # begin # complex_operation_that_internally_calls_save! @@ -12,33 +13,39 @@ module ActiveRecord class RecordInvalid < ActiveRecordError attr_reader :record - def initialize(record) - @record = record - errors = @record.errors.full_messages.join(", ") - super(I18n.t(:"#{@record.class.i18n_scope}.errors.messages.record_invalid", :errors => errors, :default => :"errors.messages.record_invalid")) + def initialize(record = nil) + if record + @record = record + errors = @record.errors.full_messages.join(", ") + message = I18n.t(:"#{@record.class.i18n_scope}.errors.messages.record_invalid", errors: errors, default: :"errors.messages.record_invalid") + else + message = "Record invalid" + end + + super(message) end end - # = Active Record Validations + # = Active Record \Validations # - # Active Record includes the majority of its validations from <tt>ActiveModel::Validations</tt> + # Active Record includes the majority of its validations from ActiveModel::Validations # all of which accept the <tt>:on</tt> argument to define the context where the # validations are active. Active Record will always supply either the context of # <tt>:create</tt> or <tt>:update</tt> dependent on whether the model is a - # <tt>new_record?</tt>. + # {new_record?}[rdoc-ref:Persistence#new_record?]. module Validations extend ActiveSupport::Concern include ActiveModel::Validations # The validation process on save can be skipped by passing <tt>validate: false</tt>. - # The regular Base#save method is replaced with this when the validations - # module is mixed in, which it is by default. + # The regular {ActiveRecord::Base#save}[rdoc-ref:Persistence#save] method is replaced + # with this when the validations module is mixed in, which it is by default. def save(options={}) perform_validations(options) ? super : false end - # Attempts to save the record just like Base#save but will raise a +RecordInvalid+ - # exception instead of returning +false+ if the record is not valid. + # Attempts to save the record just like {ActiveRecord::Base#save}[rdoc-ref:Base#save] but + # will raise a ActiveRecord::RecordInvalid exception instead of returning +false+ if the record is not valid. def save!(options={}) perform_validations(options) ? super : raise_validation_error end @@ -46,15 +53,15 @@ module ActiveRecord # Runs all the validations within the specified context. Returns +true+ if # no errors are found, +false+ otherwise. # - # Aliased as validate. + # Aliased as #validate. # # If the argument is +false+ (default is +nil+), the context is set to <tt>:create</tt> if - # <tt>new_record?</tt> is +true+, and to <tt>:update</tt> if it is not. + # {new_record?}[rdoc-ref:Persistence#new_record?] is +true+, and to <tt>:update</tt> if it is not. # - # Validations with no <tt>:on</tt> option will run no matter the context. Validations with + # \Validations with no <tt>:on</tt> option will run no matter the context. \Validations with # some <tt>:on</tt> option will only run in the specified context. def valid?(context = nil) - context ||= (new_record? ? :create : :update) + context ||= default_validation_context output = super(context) errors.empty? && output end @@ -63,6 +70,10 @@ module ActiveRecord protected + def default_validation_context + new_record? ? :create : :update + end + def raise_validation_error raise(RecordInvalid.new(self)) end @@ -76,4 +87,5 @@ end require "active_record/validations/associated" require "active_record/validations/uniqueness" require "active_record/validations/presence" +require "active_record/validations/absence" require "active_record/validations/length" diff --git a/activerecord/lib/active_record/validations/absence.rb b/activerecord/lib/active_record/validations/absence.rb new file mode 100644 index 0000000000..2e19e6dc5c --- /dev/null +++ b/activerecord/lib/active_record/validations/absence.rb @@ -0,0 +1,24 @@ +module ActiveRecord + module Validations + class AbsenceValidator < ActiveModel::Validations::AbsenceValidator # :nodoc: + def validate_each(record, attribute, association_or_value) + return unless should_validate?(record) + if record.class._reflect_on_association(attribute) + association_or_value = Array.wrap(association_or_value).reject(&:marked_for_destruction?) + end + super + end + end + + module ClassMethods + # Validates that the specified attributes are not present (as defined by + # Object#present?). If the attribute is an association, the associated object + # is considered absent if it was marked for destruction. + # + # See ActiveModel::Validations::HelperMethods.validates_absence_of for more information. + def validates_absence_of(*attr_names) + validates_with AbsenceValidator, _merge_attributes(attr_names) + end + end + end +end diff --git a/activerecord/lib/active_record/validations/associated.rb b/activerecord/lib/active_record/validations/associated.rb index 47ccef31a5..b14db85167 100644 --- a/activerecord/lib/active_record/validations/associated.rb +++ b/activerecord/lib/active_record/validations/associated.rb @@ -2,10 +2,16 @@ module ActiveRecord module Validations class AssociatedValidator < ActiveModel::EachValidator #:nodoc: def validate_each(record, attribute, value) - if Array.wrap(value).reject {|r| r.marked_for_destruction? || r.valid?}.any? - record.errors.add(attribute, :invalid, options.merge(:value => value)) + if Array(value).reject { |r| valid_object?(r) }.any? + record.errors.add(attribute, :invalid, options.merge(value: value)) end end + + private + + def valid_object?(record) + (record.respond_to?(:marked_for_destruction?) && record.marked_for_destruction?) || record.valid? + end end module ClassMethods @@ -24,7 +30,8 @@ module ActiveRecord # # NOTE: This validation will not fail if the association hasn't been # assigned. If you want to ensure that the association is both present and - # guaranteed to be valid, you also need to use +validates_presence_of+. + # guaranteed to be valid, you also need to use + # {validates_presence_of}[rdoc-ref:Validations::ClassMethods#validates_presence_of]. # # Configuration options: # diff --git a/activerecord/lib/active_record/validations/length.rb b/activerecord/lib/active_record/validations/length.rb index 5991fbad8e..69e048eef1 100644 --- a/activerecord/lib/active_record/validations/length.rb +++ b/activerecord/lib/active_record/validations/length.rb @@ -22,7 +22,10 @@ module ActiveRecord end module ClassMethods - # See <tt>ActiveModel::Validation::LengthValidator</tt> for more information. + # Validates that the specified attributes match the length restrictions supplied. + # If the attribute is an association, records that are marked for destruction are not counted. + # + # See ActiveModel::Validations::HelperMethods.validates_length_of for more information. def validates_length_of(*attr_names) validates_with LengthValidator, _merge_attributes(attr_names) end diff --git a/activerecord/lib/active_record/validations/presence.rb b/activerecord/lib/active_record/validations/presence.rb index a9b791397b..7e85ed43ac 100644 --- a/activerecord/lib/active_record/validations/presence.rb +++ b/activerecord/lib/active_record/validations/presence.rb @@ -1,18 +1,12 @@ module ActiveRecord module Validations class PresenceValidator < ActiveModel::Validations::PresenceValidator # :nodoc: - def validate(record) + def validate_each(record, attribute, association_or_value) return unless should_validate?(record) - super - attributes.each do |attribute| - next unless record.class._reflect_on_association(attribute) - associated_records = Array.wrap(record.send(attribute)) - - # Superclass validates presence. Ensure present records aren't about to be destroyed. - if associated_records.present? && associated_records.all?(&:marked_for_destruction?) - record.errors.add(attribute, :blank, options) - end + if record.class._reflect_on_association(attribute) + association_or_value = Array.wrap(association_or_value).reject(&:marked_for_destruction?) end + super end end @@ -37,7 +31,7 @@ module ActiveRecord # This is due to the way Object#blank? handles boolean values: # <tt>false.blank? # => true</tt>. # - # This validator defers to the ActiveModel validation for presence, adding the + # This validator defers to the Active Model validation for presence, adding the # check to see that an associated object is not marked for destruction. This # prevents the parent object from validating successfully and saving, which then # deletes the associated object, thus putting the parent object into an invalid @@ -45,7 +39,8 @@ module ActiveRecord # # NOTE: This validation will not fail while using it with an association # if the latter was assigned but not valid. If you want to ensure that - # it is both present and valid, you also need to use +validates_associated+. + # it is both present and valid, you also need to use + # {validates_associated}[rdoc-ref:Validations::ClassMethods#validates_associated]. # # Configuration options: # * <tt>:message</tt> - A custom error message (default is: "can't be blank"). @@ -63,7 +58,7 @@ module ActiveRecord # or <tt>unless: Proc.new { |user| user.signup_step <= 2 }</tt>). The method, # proc or string should return or evaluate to a +true+ or +false+ value. # * <tt>:strict</tt> - Specifies whether validation should be strict. - # See <tt>ActiveModel::Validation#validates!</tt> for more information. + # See ActiveModel::Validation#validates! for more information. def validates_presence_of(*attr_names) validates_with PresenceValidator, _merge_attributes(attr_names) end diff --git a/activerecord/lib/active_record/validations/uniqueness.rb b/activerecord/lib/active_record/validations/uniqueness.rb index 5106f4e127..a376e2a17f 100644 --- a/activerecord/lib/active_record/validations/uniqueness.rb +++ b/activerecord/lib/active_record/validations/uniqueness.rb @@ -17,7 +17,13 @@ module ActiveRecord value = map_enum_attribute(finder_class, attribute, value) relation = build_relation(finder_class, table, attribute, value) - relation = relation.where.not(finder_class.primary_key => record.id) if record.persisted? + if record.persisted? && finder_class.primary_key.to_s != attribute.to_s + if finder_class.primary_key + relation = relation.where.not(finder_class.primary_key => record.id) + else + raise UnknownPrimaryKey.new(finder_class, "Can not validate uniqueness for persisted record without primary key.") + end + end relation = scope_relation(record, table, relation) relation = relation.merge(options[:conditions]) if options[:conditions] @@ -67,15 +73,18 @@ module ActiveRecord value = value.to_s[0, column.limit] end - value = Arel::Nodes::Quoted.new(value) - comparison = if !options[:case_sensitive] && !value.nil? # will use SQL LOWER function before comparison, unless it detects a case insensitive collation klass.connection.case_insensitive_comparison(table, attribute, column, value) else klass.connection.case_sensitive_comparison(table, attribute, column, value) end - klass.unscoped.where(comparison) + if value.nil? + klass.unscoped.where(comparison) + else + bind = Relation::QueryAttribute.new(attribute.to_s, value, Type::Value.new) + klass.unscoped.where(comparison, bind) + end rescue RangeError klass.none end @@ -166,7 +175,8 @@ module ActiveRecord # # === Concurrency and integrity # - # Using this validation method in conjunction with ActiveRecord::Base#save + # Using this validation method in conjunction with + # {ActiveRecord::Base#save}[rdoc-ref:Persistence#save] # does not guarantee the absence of duplicate record insertions, because # uniqueness checks on the application level are inherently prone to race # conditions. For example, suppose that two users try to post a Comment at @@ -203,12 +213,12 @@ module ActiveRecord # This could even happen if you use transactions with the 'serializable' # isolation level. The best way to work around this problem is to add a unique # index to the database table using - # ActiveRecord::ConnectionAdapters::SchemaStatements#add_index. In the - # rare case that a race condition occurs, the database will guarantee + # {connection.add_index}[rdoc-ref:ConnectionAdapters::SchemaStatements#add_index]. + # In the rare case that a race condition occurs, the database will guarantee # the field's uniqueness. # # When the database catches such a duplicate insertion, - # ActiveRecord::Base#save will raise an ActiveRecord::StatementInvalid + # {ActiveRecord::Base#save}[rdoc-ref:Persistence#save] will raise an ActiveRecord::StatementInvalid # exception. You can either choose to let this error propagate (which # will result in the default Rails exception page being shown), or you # can catch it and restart the transaction (e.g. by telling the user @@ -224,7 +234,6 @@ module ActiveRecord # # The following bundled adapters throw the ActiveRecord::RecordNotUnique exception: # - # * ActiveRecord::ConnectionAdapters::MysqlAdapter. # * ActiveRecord::ConnectionAdapters::Mysql2Adapter. # * ActiveRecord::ConnectionAdapters::SQLite3Adapter. # * ActiveRecord::ConnectionAdapters::PostgreSQLAdapter. |