diff options
Diffstat (limited to 'activerecord/lib/active_record/relation')
12 files changed, 264 insertions, 115 deletions
diff --git a/activerecord/lib/active_record/relation/batches.rb b/activerecord/lib/active_record/relation/batches.rb index e07580a563..beb8fa511c 100644 --- a/activerecord/lib/active_record/relation/batches.rb +++ b/activerecord/lib/active_record/relation/batches.rb @@ -1,3 +1,5 @@ +require "active_record/relation/batches/batch_enumerator" + module ActiveRecord module Batches # Looping through a collection of records from the database @@ -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 7a28a98721..ee078102ca 100644 --- a/activerecord/lib/active_record/relation/calculations.rb +++ b/activerecord/lib/active_record/relation/calculations.rb @@ -70,41 +70,42 @@ module ActiveRecord # +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. # - # 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) @@ -138,7 +139,7 @@ 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'] # @@ -194,7 +195,8 @@ 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" @@ -336,7 +338,6 @@ 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}" diff --git a/activerecord/lib/active_record/relation/delegation.rb b/activerecord/lib/active_record/relation/delegation.rb index 86f2c30168..27de313d05 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 diff --git a/activerecord/lib/active_record/relation/finder_methods.rb b/activerecord/lib/active_record/relation/finder_methods.rb index 6020aa238f..009b2bad57 100644 --- a/activerecord/lib/active_record/relation/finder_methods.rb +++ b/activerecord/lib/active_record/relation/finder_methods.rb @@ -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 @@ -88,7 +85,8 @@ module ActiveRecord 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 diff --git a/activerecord/lib/active_record/relation/from_clause.rb b/activerecord/lib/active_record/relation/from_clause.rb index a93952fa30..92340216ed 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) diff --git a/activerecord/lib/active_record/relation/merger.rb b/activerecord/lib/active_record/relation/merger.rb index dd8f0aa298..cb971eb255 100644 --- a/activerecord/lib/active_record/relation/merger.rb +++ b/activerecord/lib/active_record/relation/merger.rb @@ -87,8 +87,8 @@ module ActiveRecord 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? + 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 @@ -148,11 +148,15 @@ 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 f85dc35e89..660bb0899a 100644 --- a/activerecord/lib/active_record/relation/query_methods.rb +++ b/activerecord/lib/active_record/relation/query_methods.rb @@ -3,7 +3,6 @@ require "active_record/relation/query_attribute" require "active_record/relation/where_clause" require "active_record/relation/where_clause_factory" require 'active_model/forbidden_attributes_protection' -require 'active_support/core_ext/string/filters' module ActiveRecord module QueryMethods @@ -152,9 +151,9 @@ 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) @@ -168,7 +167,7 @@ module ActiveRecord # 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) @@ -185,10 +184,10 @@ module ActiveRecord # 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) @@ -242,18 +241,15 @@ module ActiveRecord # 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 +258,23 @@ 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 +290,22 @@ 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) @@ -413,12 +410,12 @@ module ActiveRecord # Performs a joins on +args+: # # 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" # # 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) @@ -551,7 +548,7 @@ 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 +558,23 @@ 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 + # + # 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 unscope(where: conditions.keys).where(conditions). 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 @@ -607,12 +604,6 @@ 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 +613,7 @@ 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) @@ -690,7 +682,7 @@ 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 +708,7 @@ 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 @@ -757,15 +749,15 @@ 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) @@ -779,13 +771,13 @@ 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 @@ -1081,8 +1073,8 @@ 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 +1089,12 @@ module ActiveRecord end end + def structurally_compatible_for_or?(other) + 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 + def new_where_clause Relation::WhereClause.empty end diff --git a/activerecord/lib/active_record/relation/where_clause_factory.rb b/activerecord/lib/active_record/relation/where_clause_factory.rb index 0430922be3..83ac074f97 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 @@ -15,6 +15,7 @@ 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) |