diff options
Diffstat (limited to 'activerecord/lib')
35 files changed, 512 insertions, 141 deletions
diff --git a/activerecord/lib/active_record/associations.rb b/activerecord/lib/active_record/associations.rb index 714f623af3..f3f77e21c0 100644 --- a/activerecord/lib/active_record/associations.rb +++ b/activerecord/lib/active_record/associations.rb @@ -1213,7 +1213,8 @@ module ActiveRecord # Returns the associated object. +nil+ is returned if none is found. # [association=(associate)] # Assigns the associate object, extracts the primary key, sets it as the foreign key, - # and saves the associate object. + # and saves the associate object. To avoid database inconsistencies, permanently deletes an existing + # associated object when assigning a new one, even if the new one isn't saved to database. # [build_association(attributes = {})] # Returns a new object of the associated type that has been instantiated # with +attributes+ and linked to this object through a foreign key, but has not diff --git a/activerecord/lib/active_record/associations/association_scope.rb b/activerecord/lib/active_record/associations/association_scope.rb index 17f056e764..5a0ba9e6b1 100644 --- a/activerecord/lib/active_record/associations/association_scope.rb +++ b/activerecord/lib/active_record/associations/association_scope.rb @@ -1,3 +1,5 @@ +require 'active_record/associations/join_helper' + module ActiveRecord module Associations class AssociationScope #:nodoc: diff --git a/activerecord/lib/active_record/associations/builder/association.rb b/activerecord/lib/active_record/associations/builder/association.rb index 3911d1b520..f085fd1cfd 100644 --- a/activerecord/lib/active_record/associations/builder/association.rb +++ b/activerecord/lib/active_record/associations/builder/association.rb @@ -26,6 +26,12 @@ module ActiveRecord::Associations::Builder attr_reader :name, :scope, :options def self.build(model, name, scope, options, &block) + if model.dangerous_attribute_method?(name) + raise ArgumentError, "You tried to define an association named #{name} on the model #{model.name}, but " \ + "this will conflict with a method #{name} already defined by Active Record. " \ + "Please choose a different association name." + end + builder = create_builder model, name, scope, options, &block reflection = builder.build(model) define_accessors model, reflection diff --git a/activerecord/lib/active_record/associations/collection_association.rb b/activerecord/lib/active_record/associations/collection_association.rb index 52531a3520..89b7945c78 100644 --- a/activerecord/lib/active_record/associations/collection_association.rb +++ b/activerecord/lib/active_record/associations/collection_association.rb @@ -96,11 +96,31 @@ module ActiveRecord end def first(*args) - first_or_last(:first, *args) + first_nth_or_last(:first, *args) + end + + def second(*args) + first_nth_or_last(:second, *args) + end + + def third(*args) + first_nth_or_last(:third, *args) + end + + def fourth(*args) + first_nth_or_last(:fourth, *args) + end + + def fifth(*args) + first_nth_or_last(:fifth, *args) + end + + def forty_two(*args) + first_nth_or_last(:forty_two, *args) end def last(*args) - first_or_last(:last, *args) + first_nth_or_last(:last, *args) end def build(attributes = {}, &block) @@ -526,7 +546,7 @@ module ActiveRecord # * target already loaded # * owner is new record # * target contains new or changed record(s) - def fetch_first_or_last_using_find?(args) + def fetch_first_nth_or_last_using_find?(args) if args.first.is_a?(Hash) true else @@ -564,10 +584,10 @@ module ActiveRecord end # Fetches the first/last using SQL if possible, otherwise from the target array. - def first_or_last(type, *args) + def first_nth_or_last(type, *args) args.shift if args.first.is_a?(Hash) && args.first.empty? - collection = fetch_first_or_last_using_find?(args) ? scope : load_target + collection = fetch_first_nth_or_last_using_find?(args) ? scope : load_target collection.send(type, *args).tap do |record| set_inverse_instance record if record.is_a? ActiveRecord::Base end diff --git a/activerecord/lib/active_record/associations/collection_proxy.rb b/activerecord/lib/active_record/associations/collection_proxy.rb index e3fc908444..eba688866c 100644 --- a/activerecord/lib/active_record/associations/collection_proxy.rb +++ b/activerecord/lib/active_record/associations/collection_proxy.rb @@ -84,7 +84,7 @@ module ActiveRecord # # Be careful because this also means you're initializing a model # object with only the fields that you've selected. If you attempt - # to access a field that is not in the initialized record you'll + # to access a field except +id+ that is not in the initialized record you'll # receive: # # person.pets.select(:name).first.person_id @@ -170,6 +170,32 @@ module ActiveRecord @association.first(*args) end + # 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. + def third(*args) + @association.third(*args) + end + + # 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. + def fifth(*args) + @association.fifth(*args) + end + + # Same as +first+ except returns only the forty second record. + # Also known as accessing "the reddit". + def forty_two(*args) + @association.forty_two(*args) + end + # Returns the last record, or the last +n+ records, from the collection. # If the collection is empty, the first form returns +nil+, and the second # form returns an empty array. @@ -978,6 +1004,28 @@ module ActiveRecord proxy_association.reload self end + + # Unloads the association. Returns +self+. + # + # class Person < ActiveRecord::Base + # has_many :pets + # end + # + # person.pets # fetches pets from the database + # # => [#<Pet id: 1, name: "Snoop", group: "dogs", person_id: 1>] + # + # person.pets # uses the pets cache + # # => [#<Pet id: 1, name: "Snoop", group: "dogs", person_id: 1>] + # + # person.pets.reset # clears the pets cache + # + # person.pets # fetches pets from the database + # # => [#<Pet id: 1, name: "Snoop", group: "dogs", person_id: 1>] + def reset + proxy_association.reset + proxy_association.reset_scope + self + end end 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 84e18684d8..0cd2e1a816 100644 --- a/activerecord/lib/active_record/associations/join_dependency/join_association.rb +++ b/activerecord/lib/active_record/associations/join_dependency/join_association.rb @@ -52,18 +52,16 @@ module ActiveRecord end end - if reflection.type - scope_chain_items << - ActiveRecord::Relation.create(klass, table) - .where(reflection.type => foreign_klass.base_class.name) - end - scope_chain_items.concat [klass.send(:build_default_scope)].compact rel = scope_chain_items.inject(scope_chain_items.shift) do |left, right| left.merge right end + if reflection.type + constraint = constraint.and table[reflection.type].eq foreign_klass.base_class.name + end + if rel && !rel.arel.constraints.empty? constraint = constraint.and rel.arel.constraints end diff --git a/activerecord/lib/active_record/associations/singular_association.rb b/activerecord/lib/active_record/associations/singular_association.rb index e4500af5b2..399aff378a 100644 --- a/activerecord/lib/active_record/associations/singular_association.rb +++ b/activerecord/lib/active_record/associations/singular_association.rb @@ -39,7 +39,7 @@ module ActiveRecord end def find_target - if record = scope.first + if record = scope.take set_inverse_instance record end end diff --git a/activerecord/lib/active_record/attribute_methods.rb b/activerecord/lib/active_record/attribute_methods.rb index 73761520f7..9326c9c117 100644 --- a/activerecord/lib/active_record/attribute_methods.rb +++ b/activerecord/lib/active_record/attribute_methods.rb @@ -110,16 +110,34 @@ module ActiveRecord end end - # A method name is 'dangerous' if it is already defined by Active Record, but + # A method name is 'dangerous' if it is already (re)defined by Active Record, but # not by any ancestors. (So 'puts' is not dangerous but 'save' is.) def dangerous_attribute_method?(name) # :nodoc: method_defined_within?(name, Base) end - def method_defined_within?(name, klass, sup = klass.superclass) # :nodoc: + def method_defined_within?(name, klass, superklass = klass.superclass) # :nodoc: if klass.method_defined?(name) || klass.private_method_defined?(name) - if sup.method_defined?(name) || sup.private_method_defined?(name) - klass.instance_method(name).owner != sup.instance_method(name).owner + if superklass.method_defined?(name) || superklass.private_method_defined?(name) + klass.instance_method(name).owner != superklass.instance_method(name).owner + else + true + end + else + false + end + end + + # A class method is 'dangerous' if it is already (re)defined by Active Record, but + # not by any ancestors. (So 'puts' is not dangerous but 'new' is.) + def dangerous_class_method?(method_name) + class_method_defined_within?(method_name, Base) + end + + def class_method_defined_within?(name, klass, superklass = klass.superclass) # :nodoc + if klass.respond_to?(name, true) + if superklass.respond_to?(name, true) + klass.method(name).owner != superklass.method(name).owner else true end @@ -260,6 +278,11 @@ module ActiveRecord } end + # Placeholder so it can be overriden when needed by serialization + def attributes_for_coder # :nodoc: + attributes + end + # Returns an <tt>#inspect</tt>-like string for the value of the # attribute +attr_name+. String attributes are truncated upto 50 # characters, Date and Time attributes are returned in the diff --git a/activerecord/lib/active_record/attribute_methods/dirty.rb b/activerecord/lib/active_record/attribute_methods/dirty.rb index 19e81abba5..8a1b199997 100644 --- a/activerecord/lib/active_record/attribute_methods/dirty.rb +++ b/activerecord/lib/active_record/attribute_methods/dirty.rb @@ -38,11 +38,37 @@ module ActiveRecord end end + def initialize_dup(other) # :nodoc: + super + init_changed_attributes + end + private + def initialize_internals_callback + super + init_changed_attributes + end + + def init_changed_attributes + @changed_attributes = nil + # Intentionally avoid using #column_defaults since overridden defaults (as is done in + # optimistic locking) won't get written unless they get marked as changed + self.class.columns.each do |c| + attr, orig_value = c.name, c.default + changed_attributes[attr] = orig_value if _field_changed?(attr, orig_value, @attributes[attr]) + end + end + # Wrap write_attribute to remember original attribute value. def write_attribute(attr, value) attr = attr.to_s + save_changed_attribute(attr, value) + + super(attr, value) + end + + def save_changed_attribute(attr, value) # The attribute already has an unsaved change. if attribute_changed?(attr) old = changed_attributes[attr] @@ -51,9 +77,6 @@ module ActiveRecord old = clone_attribute_value(:read_attribute, attr) changed_attributes[attr] = old if _field_changed?(attr, old, value) end - - # Carry on. - super(attr, value) end def update_record(*) @@ -67,7 +90,7 @@ module ActiveRecord # Serialized attributes should always be written in case they've been # changed in place. def keys_for_partial_write - changed | (attributes.keys & self.class.serialized_attributes.keys) + changed end def _field_changed?(attr, old, value) diff --git a/activerecord/lib/active_record/attribute_methods/serialization.rb b/activerecord/lib/active_record/attribute_methods/serialization.rb index d484659190..67abbbc2a0 100644 --- a/activerecord/lib/active_record/attribute_methods/serialization.rb +++ b/activerecord/lib/active_record/attribute_methods/serialization.rb @@ -115,6 +115,14 @@ module ActiveRecord end end + def should_record_timestamps? + super || (self.record_timestamps && (attributes.keys & self.class.serialized_attributes.keys).present?) + end + + def keys_for_partial_write + super | (attributes.keys & self.class.serialized_attributes.keys) + end + def type_cast_attribute_for_write(column, value) if column && coder = self.class.serialized_attributes[column.name] Attribute.new(coder, value, :unserialized) @@ -156,6 +164,16 @@ module ActiveRecord super end end + + def attributes_for_coder + attribute_names.each_with_object({}) do |name, attrs| + attrs[name] = if self.class.serialized_attributes.include?(name) + @attributes[name].serialized_value + else + read_attribute(name) + end + end + end end end end diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb index 1d3ec75aa1..9ec1feea97 100644 --- a/activerecord/lib/active_record/base.rb +++ b/activerecord/lib/active_record/base.rb @@ -294,6 +294,7 @@ module ActiveRecord #:nodoc: extend Enum extend Delegation::DelegateCache + include Core include Persistence include NoTouching include ReadonlyAttributes @@ -320,7 +321,6 @@ module ActiveRecord #:nodoc: include Reflection include Serialization include Store - include Core end ActiveSupport.run_load_hooks(:active_record, Base) 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 c90915c509..6eb59cc398 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb @@ -20,6 +20,14 @@ module ActiveRecord # Returns an ActiveRecord::Result instance. def select_all(arel, name = nil, binds = []) + if arel.is_a?(Relation) + relation = arel + arel = relation.arel + if !binds || binds.empty? + binds = relation.bind_values + end + end + select(to_sql(arel, binds), name, binds) end @@ -39,13 +47,16 @@ 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) - select_rows(to_sql(arel, []), name) - .map { |v| v[0] } + binds = [] + if arel.is_a?(Relation) + arel, binds = arel.arel, arel.bind_values + end + select_rows(to_sql(arel, binds), name, binds).map(&: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) + def select_rows(sql, name = nil, binds = []) end undef_method :select_rows diff --git a/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb b/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb index 2b6685499a..bc4884b538 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb @@ -23,6 +23,10 @@ module ActiveRecord @parent = nil end + def finalized? + @state + end + def committed? @state == :committed end diff --git a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb index 8aa1ce5c04..3c94bad208 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb @@ -349,6 +349,14 @@ module ActiveRecord protected + def translate_exception_class(e, sql) + message = "#{e.class.name}: #{e.message}: #{sql}" + @logger.error message if @logger + exception = translate_exception(e, message) + exception.set_backtrace e.backtrace + exception + end + def log(sql, name = "SQL", binds = [], statement_name = nil) @instrumenter.instrument( "sql.active_record", @@ -358,11 +366,7 @@ module ActiveRecord :statement_name => statement_name, :binds => binds) { yield } rescue => e - message = "#{e.class.name}: #{e.message}: #{sql}" - @logger.error message if @logger - exception = translate_exception(e, message) - exception.set_backtrace e.backtrace - raise exception + raise translate_exception_class(e, sql) end def translate_exception(exception, message) diff --git a/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb b/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb index 6d8e994654..b07b0cb826 100644 --- a/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb @@ -213,7 +213,7 @@ module ActiveRecord # Returns an array of arrays containing the field values. # Order is the same as that returned by +columns+. - def select_rows(sql, name = nil) + def select_rows(sql, name = nil, binds = []) execute(sql, name).to_a end diff --git a/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb b/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb index 7dbaa272a3..49f0bfbcde 100644 --- a/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb @@ -213,9 +213,9 @@ module ActiveRecord # DATABASE STATEMENTS ====================================== - def select_rows(sql, name = nil) + def select_rows(sql, name = nil, binds = []) @connection.query_with_result = true - rows = exec_query(sql, name).rows + 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 diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/array_parser.rb b/activerecord/lib/active_record/connection_adapters/postgresql/array_parser.rb index 20de8d1982..0b218f2bfd 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/array_parser.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/array_parser.rb @@ -91,8 +91,9 @@ module ActiveRecord end def add_item_to_array(array, current_item, quoted) - if current_item.length == 0 - elsif !quoted && current_item == 'NULL' + return if !quoted && current_item.length == 0 + + if !quoted && current_item == 'NULL' array.push nil else array.push current_item 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 f349c37724..51ee2829b2 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb @@ -46,8 +46,8 @@ module ActiveRecord # Executes a SELECT query and returns an array of rows. Each row is an # array of field values. - def select_rows(sql, name = nil) - select_raw(sql, name).last + def select_rows(sql, name = nil, binds = []) + exec_query(sql, name, binds).rows end # Executes an INSERT query and returns the new record's ID diff --git a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb index 7e188907e1..9618ba4087 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb @@ -853,7 +853,11 @@ module ActiveRecord sql_key = sql_key(sql) unless @statements.key? sql_key nextkey = @statements.next_key - @connection.prepare nextkey, sql + begin + @connection.prepare nextkey, sql + rescue => e + raise translate_exception_class(e, sql) + end # Clear the queue @connection.get_last_result @statements[sql_key] = nextkey @@ -938,14 +942,6 @@ module ActiveRecord exec_query(sql, name, binds) end - def select_raw(sql, name = nil) - res = execute(sql, name) - results = result_as_array(res) - fields = res.fields - res.clear - return fields, results - end - # Returns the list of a table's column names, data types, and default values. # # The underlying query is roughly: diff --git a/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb b/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb index 92bb70ba53..3c5f7a981e 100644 --- a/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb @@ -155,6 +155,10 @@ module ActiveRecord true end + def supports_partial_index? + sqlite_version >= '3.8.0' + end + # Returns true, since this connection adapter supports prepared statement # caching. def supports_statement_cache? @@ -343,8 +347,8 @@ module ActiveRecord end alias :create :insert_sql - def select_rows(sql, name = nil) - exec_query(sql, name).rows + def select_rows(sql, name = nil, binds = []) + exec_query(sql, name, binds).rows end def begin_db_transaction #:nodoc: @@ -397,13 +401,25 @@ module ActiveRecord # Returns an array of indexes for the given table. def indexes(table_name, name = nil) #:nodoc: exec_query("PRAGMA index_list(#{quote_table_name(table_name)})", 'SCHEMA').map do |row| + sql = <<-SQL + SELECT sql + FROM sqlite_master + WHERE name=#{quote(row['name'])} AND type='index' + UNION ALL + SELECT sql + FROM sqlite_temp_master + WHERE name=#{quote(row['name'])} AND type='index' + SQL + index_sql = exec_query(sql).first['sql'] + match = /\sWHERE\s+(.+)$/i.match(index_sql) + where = match[1] if match IndexDefinition.new( table_name, row['name'], row['unique'] != 0, exec_query("PRAGMA index_info('#{row['name']}')", "SCHEMA").map { |col| col['name'] - }) + }, nil, nil, where) end end diff --git a/activerecord/lib/active_record/core.rb b/activerecord/lib/active_record/core.rb index cd8690d500..6303fe5ee4 100644 --- a/activerecord/lib/active_record/core.rb +++ b/activerecord/lib/active_record/core.rb @@ -182,9 +182,7 @@ module ActiveRecord @column_types = self.class.column_types init_internals - init_changed_attributes - ensure_proper_type - populate_with_current_scope_attributes + initialize_internals_callback # +options+ argument is only needed to make protected_attributes gem easier to hook. # Remove it when we drop support to this gem. @@ -255,16 +253,12 @@ module ActiveRecord run_callbacks(:initialize) unless _initialize_callbacks.empty? - @changed_attributes = {} - init_changed_attributes - @aggregation_cache = {} @association_cache = {} @attributes_cache = {} @new_record = true - ensure_proper_type super end @@ -281,7 +275,7 @@ module ActiveRecord # Post.new.encode_with(coder) # coder # => {"attributes" => {"id" => nil, ... }} def encode_with(coder) - coder['attributes'] = attributes + coder['attributes'] = attributes_for_coder end # Returns true if +comparison_object+ is the same exact object, or +comparison_object+ @@ -397,13 +391,10 @@ module ActiveRecord end def update_attributes_from_transaction_state(transaction_state, depth) - if transaction_state && !has_transactional_callbacks? + if transaction_state && transaction_state.finalized? && !has_transactional_callbacks? unless @reflects_state[depth] - if transaction_state.committed? - committed! - elsif transaction_state.rolledback? - rolledback! - end + restore_transaction_record_state if transaction_state.rolledback? + clear_transaction_record_state @reflects_state[depth] = true end @@ -443,13 +434,7 @@ module ActiveRecord @reflects_state = [false] end - def init_changed_attributes - # Intentionally avoid using #column_defaults since overridden defaults (as is done in - # optimistic locking) won't get written unless they get marked as changed - self.class.columns.each do |c| - attr, orig_value = c.name, c.default - changed_attributes[attr] = orig_value if _field_changed?(attr, orig_value, @attributes[attr]) - end + def initialize_internals_callback end # This method is needed to make protected_attributes gem easier to hook. diff --git a/activerecord/lib/active_record/dynamic_matchers.rb b/activerecord/lib/active_record/dynamic_matchers.rb index 5caab09038..e94b74063e 100644 --- a/activerecord/lib/active_record/dynamic_matchers.rb +++ b/activerecord/lib/active_record/dynamic_matchers.rb @@ -6,8 +6,12 @@ module ActiveRecord # then we can remove the indirection. def respond_to?(name, include_private = false) - match = Method.match(self, name) - match && match.valid? || super + if self == Base + super + else + match = Method.match(self, name) + match && match.valid? || super + end end private diff --git a/activerecord/lib/active_record/enum.rb b/activerecord/lib/active_record/enum.rb index 9ad718a02a..059bfe9a0f 100644 --- a/activerecord/lib/active_record/enum.rb +++ b/activerecord/lib/active_record/enum.rb @@ -54,23 +54,35 @@ module ActiveRecord # 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 constant with the attributes name: + # The mappings are exposed through a class method with the pluralized attribute + # name: # - # Conversation::STATUS # => { "active" => 0, "archived" => 1 } + # Conversation.statuses # => { "active" => 0, "archived" => 1 } # - # Use that constant when you need to know the ordinal value of an enum: + # Use that class method when you need to know the ordinal value of an enum: # - # Conversation.where("status <> ?", Conversation::STATUS[:archived]) + # Conversation.where("status <> ?", Conversation.statuses[:archived]) module Enum + DEFINED_ENUMS = {} # :nodoc: + + def enum_mapping_for(attr_name) # :nodoc: + DEFINED_ENUMS[attr_name.to_s] + end + def enum(definitions) klass = self definitions.each do |name, values| - # STATUS = { } - enum_values = _enum_methods_module.const_set name.to_s.upcase, ActiveSupport::HashWithIndifferentAccess.new + # statuses = { } + enum_values = ActiveSupport::HashWithIndifferentAccess.new name = name.to_sym + # def self.statuses statuses end + detect_enum_conflict!(name, name.to_s.pluralize, true) + klass.singleton_class.send(:define_method, name.to_s.pluralize) { enum_values } + _enum_methods_module.module_eval do - # def status=(value) self[:status] = STATUS[value] end + # def status=(value) self[:status] = statuses[value] end + klass.send(:detect_enum_conflict!, name, "#{name}=") define_method("#{name}=") { |value| if enum_values.has_key?(value) || value.blank? self[name] = enum_values[value] @@ -84,22 +96,32 @@ module ActiveRecord end } - # def status() STATUS.key self[:status] end + # def status() statuses.key self[:status] end + klass.send(:detect_enum_conflict!, name, name) define_method(name) { enum_values.key self[name] } + # def status_before_type_cast() statuses.key self[:status] end + klass.send(:detect_enum_conflict!, name, "#{name}_before_type_cast") + define_method("#{name}_before_type_cast") { enum_values.key self[name] } + pairs = values.respond_to?(:each_pair) ? values.each_pair : values.each_with_index pairs.each do |value, i| enum_values[value] = i - # scope :active, -> { where status: 0 } - klass.scope value, -> { klass.where name => i } - # def active?() status == 0 end + klass.send(:detect_enum_conflict!, name, "#{value}?") define_method("#{value}?") { self[name] == i } # def active!() update! status: :active end + klass.send(:detect_enum_conflict!, name, "#{value}!") define_method("#{value}!") { update! name => value } + + # scope :active, -> { where status: 0 } + klass.send(:detect_enum_conflict!, name, value, true) + klass.scope value, -> { klass.where name => i } end + + DEFINED_ENUMS[name.to_s] = enum_values end end end @@ -107,10 +129,64 @@ module ActiveRecord private def _enum_methods_module @_enum_methods_module ||= begin - mod = Module.new + mod = Module.new do + private + def save_changed_attribute(attr_name, value) + if (mapping = self.class.enum_mapping_for(attr_name)) + if attribute_changed?(attr_name) + old = changed_attributes[attr_name] + + if mapping[old] == value + changed_attributes.delete(attr_name) + end + else + old = clone_attribute_value(:read_attribute, attr_name) + + if old != value + changed_attributes[attr_name] = mapping.key old + end + end + else + super + end + end + end include mod mod end end + + ENUM_CONFLICT_MESSAGE = \ + "You tried to define an enum named \"%{enum}\" on the model \"%{klass}\", but " \ + "this will generate a %{type} method \"%{method}\", which is already defined " \ + "by %{source}." + + 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' + } + 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' + } + 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' + } + end + end end end diff --git a/activerecord/lib/active_record/fixtures.rb b/activerecord/lib/active_record/fixtures.rb index fee3f51d9e..297792aeec 100644 --- a/activerecord/lib/active_record/fixtures.rb +++ b/activerecord/lib/active_record/fixtures.rb @@ -462,7 +462,7 @@ module ActiveRecord @class_names.delete_if { |k,klass| unless klass.is_a? Class klass = klass.safe_constantize - ActiveSupport::Deprecation.warn("The ability to pass in strings as a class name will be removed in Rails 4.2, consider using the class itself instead.") + ActiveSupport::Deprecation.warn("The ability to pass in strings as a class name to `set_fixture_class` will be removed in Rails 4.2. Use the class itself instead.") end !insert_class(@class_names, k, klass) } @@ -568,7 +568,7 @@ module ActiveRecord @model_class = nil if class_name.is_a?(String) - ActiveSupport::Deprecation.warn("The ability to pass in strings as a class name will be removed in Rails 4.2, consider using the class itself instead.") + ActiveSupport::Deprecation.warn("The ability to pass in strings as a class name to `FixtureSet.new` will be removed in Rails 4.2. Use the class itself instead.") end if class_name.is_a?(Class) # TODO: Should be an AR::Base type class, or any? diff --git a/activerecord/lib/active_record/inheritance.rb b/activerecord/lib/active_record/inheritance.rb index 949e7678a5..08fc91c9df 100644 --- a/activerecord/lib/active_record/inheritance.rb +++ b/activerecord/lib/active_record/inheritance.rb @@ -18,13 +18,17 @@ module ActiveRecord if abstract_class? || self == Base raise NotImplementedError, "#{self} is an abstract class and cannot be instantiated." end - if (attrs = args.first).is_a?(Hash) - if subclass = subclass_from_attrs(attrs) - return subclass.new(*args, &block) - end + + attrs = args.first + if subclass_from_attributes?(attrs) + subclass = subclass_from_attributes(attrs) + end + + if subclass + subclass.new(*args, &block) + else + super end - # Delegate to the original .new - super end # Returns +true+ if this does not need STI type condition. Returns @@ -126,7 +130,7 @@ module ActiveRecord end end - raise NameError, "uninitialized constant #{candidates.first}" + raise NameError.new("uninitialized constant #{candidates.first}", candidates.first) end end @@ -172,7 +176,11 @@ module ActiveRecord # 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_attrs(attrs) + def subclass_from_attributes?(attrs) + columns_hash.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_name != self.name @@ -187,8 +195,18 @@ module ActiveRecord end end + def initialize_dup(other) + super + ensure_proper_type + end + private + def initialize_internals_callback + super + ensure_proper_type + end + # Sets the attribute used for single table inheritance to this class name if this is not the # ActiveRecord::Base descendant. # Considering the hierarchy Reply < Message < ActiveRecord::Base, this makes it possible to diff --git a/activerecord/lib/active_record/persistence.rb b/activerecord/lib/active_record/persistence.rb index 4669c072a1..b1b35ed940 100644 --- a/activerecord/lib/active_record/persistence.rb +++ b/activerecord/lib/active_record/persistence.rb @@ -196,7 +196,11 @@ module ActiveRecord # share the same set of attributes. def becomes!(klass) became = becomes(klass) - became.public_send("#{klass.inheritance_column}=", klass.sti_name) unless self.class.descends_from_active_record? + sti_type = nil + if !klass.descends_from_active_record? + sti_type = klass.sti_name + end + became.public_send("#{klass.inheritance_column}=", sti_type) became end @@ -385,7 +389,7 @@ module ActiveRecord fresh_object = if options && options[:lock] - self.class.unscoped { self.class.lock.find(id) } + self.class.unscoped { self.class.lock(options[:lock]).find(id) } else self.class.unscoped { self.class.find(id) } end diff --git a/activerecord/lib/active_record/querying.rb b/activerecord/lib/active_record/querying.rb index fd4c973504..ef138c6f80 100644 --- a/activerecord/lib/active_record/querying.rb +++ b/activerecord/lib/active_record/querying.rb @@ -1,6 +1,7 @@ module ActiveRecord module Querying delegate :find, :take, :take!, :first, :first!, :last, :last!, :exists?, :any?, :many?, to: :all + delegate :second, :second!, :third, :third!, :fourth, :fourth!, :fifth, :fifth!, :forty_two, :forty_two!, to: :all delegate :first_or_create, :first_or_create!, :first_or_initialize, to: :all delegate :find_or_create_by, :find_or_create_by!, :find_or_initialize_by, to: :all delegate :find_by, :find_by!, to: :all diff --git a/activerecord/lib/active_record/relation.rb b/activerecord/lib/active_record/relation.rb index 745c6cf349..fb213dc6f7 100644 --- a/activerecord/lib/active_record/relation.rb +++ b/activerecord/lib/active_record/relation.rb @@ -24,6 +24,7 @@ module ActiveRecord @klass = klass @table = table @values = values + @offsets = {} @loaded = false end @@ -495,9 +496,10 @@ module ActiveRecord end def reset - @first = @last = @to_sql = @order_clause = @scope_for_create = @arel = @loaded = nil + @last = @to_sql = @order_clause = @scope_for_create = @arel = @loaded = nil @should_eager_load = @join_dependency = nil @records = [] + @offsets = {} self end @@ -533,7 +535,6 @@ module ActiveRecord } binds = Hash[bind_values.find_all(&:first).map { |column, v| [column.name, v] }] - binds.merge!(Hash[bind_values.find_all(&:first).map { |column, v| [column.name, v] }]) Hash[equalities.map { |where| name = where.left.name diff --git a/activerecord/lib/active_record/relation/batches.rb b/activerecord/lib/active_record/relation/batches.rb index 49b01909c6..666cef80a9 100644 --- a/activerecord/lib/active_record/relation/batches.rb +++ b/activerecord/lib/active_record/relation/batches.rb @@ -64,6 +64,16 @@ module ActiveRecord # group.each { |person| person.party_all_night! } # end # + # If you do not provide a block to #find_in_batches, it will return an Enumerator + # for chaining with other methods: + # + # Person.find_in_batches.with_index do |group, batch| + # puts "Processing group ##{batch}" + # group.each(&:recover_from_last_night!) + # end + # + # To be yielded each record one by one, use #find_each instead. + # # ==== Options # * <tt>:batch_size</tt> - Specifies the size of the batch. Default to 1000. # * <tt>:start</tt> - Specifies the starting point for the batch processing. @@ -86,6 +96,7 @@ module ActiveRecord # the batch sizes. def find_in_batches(options = {}) options.assert_valid_keys(:start, :batch_size) + return to_enum(:find_in_batches, options) unless block_given? relation = self @@ -93,8 +104,8 @@ module ActiveRecord logger.warn("Scoped order and limit are ignored, it's forced to be batch order and batch size") end - start = options.delete(:start) - batch_size = options.delete(:batch_size) || 1000 + start = options[:start] + batch_size = options[:batch_size] || 1000 relation = relation.reorder(batch_order).limit(batch_size) records = start ? relation.where(table[primary_key].gteq(start)).to_a : relation.to_a @@ -102,16 +113,13 @@ module ActiveRecord 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 yield records break if records_size < batch_size - if primary_key_offset - records = relation.where(table[primary_key].gt(primary_key_offset)).to_a - else - raise "Primary key not included in the custom select clause" - end + records = relation.where(table[primary_key].gt(primary_key_offset)).to_a end end diff --git a/activerecord/lib/active_record/relation/finder_methods.rb b/activerecord/lib/active_record/relation/finder_methods.rb index 4984dbd277..01d46f7676 100644 --- a/activerecord/lib/active_record/relation/finder_methods.rb +++ b/activerecord/lib/active_record/relation/finder_methods.rb @@ -127,9 +127,9 @@ module ActiveRecord # def first(limit = nil) if limit - find_first_with_limit(limit) + find_nth_with_limit(offset_value, limit) else - find_first + find_nth(:first, offset_value) end end @@ -172,6 +172,86 @@ module ActiveRecord last or raise RecordNotFound end + # Find the second record. + # If no order is defined it will order by primary key. + # + # Person.second # returns the second object fetched by SELECT * FROM people + # 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(:second, offset_value ? offset_value + 1 : 1) + end + + # Same as +second+ but raises <tt>ActiveRecord::RecordNotFound</tt> if no record + # is found. + def second! + second or raise RecordNotFound + end + + # Find the third record. + # If no order is defined it will order by primary key. + # + # Person.third # returns the third object fetched by SELECT * FROM people + # 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(:third, offset_value ? offset_value + 2 : 2) + end + + # Same as +third+ but raises <tt>ActiveRecord::RecordNotFound</tt> if no record + # is found. + def third! + third or raise RecordNotFound + end + + # Find the fourth record. + # If no order is defined it will order by primary key. + # + # Person.fourth # returns the fourth object fetched by SELECT * FROM people + # 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(:fourth, offset_value ? offset_value + 3 : 3) + end + + # Same as +fourth+ but raises <tt>ActiveRecord::RecordNotFound</tt> if no record + # is found. + def fourth! + fourth or raise RecordNotFound + end + + # Find the fifth record. + # If no order is defined it will order by primary key. + # + # Person.fifth # returns the fifth object fetched by SELECT * FROM people + # 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(:fifth, offset_value ? offset_value + 4 : 4) + end + + # Same as +fifth+ but raises <tt>ActiveRecord::RecordNotFound</tt> if no record + # is found. + def fifth! + fifth or raise RecordNotFound + end + + # Find the forty-second record. Also known as accessing "the reddit". + # If no order is defined it will order by primary key. + # + # Person.forty_two # returns the forty-second object fetched by SELECT * FROM people + # Person.offset(3).forty_two # returns the fifth object from OFFSET 3 (which is OFFSET 44) + # Person.where(["user_name = :u", { u: user_name }]).forty_two + def forty_two + find_nth(:forty_two, offset_value ? offset_value + 41 : 41) + end + + # Same as +forty_two+ but raises <tt>ActiveRecord::RecordNotFound</tt> if no record + # is found. + def forty_two! + forty_two or raise RecordNotFound + 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: # @@ -231,9 +311,9 @@ module ActiveRecord conditions = " [#{conditions}]" if conditions if Array(ids).size == 1 - error = "Couldn't find #{@klass.name} with #{primary_key}=#{ids}#{conditions}" + error = "Couldn't find #{@klass.name} with '#{primary_key}'=#{ids}#{conditions}" else - error = "Couldn't find all #{@klass.name.pluralize} with IDs " + error = "Couldn't find all #{@klass.name.pluralize} with '#{primary_key}': " error << "(#{ids.join(", ")})#{conditions} (found #{result_size} results, but was looking for #{expected_size})" end @@ -364,19 +444,19 @@ module ActiveRecord end end - def find_first + def find_nth(ordinal, offset) if loaded? - @records.first + @records.send(ordinal) else - @first ||= find_first_with_limit(1).first + @offsets[offset] ||= find_nth_with_limit(offset, 1).first end end - def find_first_with_limit(limit) + def find_nth_with_limit(offset, limit) if order_values.empty? && primary_key - order(arel_table[primary_key].asc).limit(limit).to_a + order(arel_table[primary_key].asc).limit(limit).offset(offset).to_a else - limit(limit).to_a + limit(limit).offset(offset).to_a end end diff --git a/activerecord/lib/active_record/relation/query_methods.rb b/activerecord/lib/active_record/relation/query_methods.rb index 78da6a83ec..860063426a 100644 --- a/activerecord/lib/active_record/relation/query_methods.rb +++ b/activerecord/lib/active_record/relation/query_methods.rb @@ -120,6 +120,9 @@ module ActiveRecord # Will throw an error, but this will work: # # User.includes(:posts).where('posts.name = ?', 'example').references(:posts) + # + # Note that +includes+ works with association names while +references+ needs + # the actual table name. def includes(*args) check_if_method_has_arguments!(:includes, args) spawn.includes!(*args) @@ -163,24 +166,26 @@ module ActiveRecord self end - # Used to indicate that an association is referenced by an SQL string, and should - # therefore be JOINed in any query rather than loaded separately. + # 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 conjuction with +includes+. + # See #includes for more details. # # User.includes(:posts).where("posts.name = 'foo'") # # => 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 - def references(*args) - check_if_method_has_arguments!(:references, args) - spawn.references!(*args) + def references(*table_names) + check_if_method_has_arguments!(:references, table_names) + spawn.references!(*table_names) end - def references!(*args) # :nodoc: - args.flatten! - args.map!(&:to_s) + def references!(*table_names) # :nodoc: + table_names.flatten! + table_names.map!(&:to_s) - self.references_values |= args + self.references_values |= table_names self end @@ -234,7 +239,9 @@ module ActiveRecord def select!(*fields) # :nodoc: fields.flatten! - + fields.map! do |field| + klass.attribute_alias?(field) ? klass.attribute_alias(field).to_sym : field + end self.select_values += fields self end @@ -855,11 +862,11 @@ module ActiveRecord end single_val_method = Relation::SINGLE_VALUE_METHODS.include?(scope) - unscope_code = :"#{scope}_value#{'s' unless single_val_method}=" + unscope_code = "#{scope}_value#{'s' unless single_val_method}=" case scope when :order - self.send(:reverse_order_value=, false) + self.reverse_order_value = false result = [] else result = [] unless single_val_method @@ -869,17 +876,17 @@ module ActiveRecord end def where_unscoping(target_value) - target_value_sym = target_value.to_sym + target_value = target_value.to_s where_values.reject! do |rel| case rel when Arel::Nodes::In, Arel::Nodes::NotIn, Arel::Nodes::Equality, Arel::Nodes::NotEqual subrelation = (rel.left.kind_of?(Arel::Attributes::Attribute) ? rel.left : rel.right) - subrelation.name.to_sym == target_value_sym - else - raise "unscope(where: #{target_value.inspect}) failed: unscoping #{rel.class} is unimplemented." + subrelation.name == target_value end end + + bind_values.reject! { |col,_| col.name == target_value } end def custom_join_ast(table, joins) @@ -985,7 +992,10 @@ module ActiveRecord def build_select(arel, selects) if !selects.empty? - arel.project(*selects) + expanded_select = selects.map do |field| + columns_hash.key?(field.to_s) ? arel_table[field] : field + end + arel.project(*expanded_select) elsif from_value arel.project(Arel.star) else @@ -1043,9 +1053,11 @@ module ActiveRecord order_args.map! do |arg| case arg when Symbol + arg = klass.attribute_alias(arg).to_sym if klass.attribute_alias?(arg) table[arg].asc when Hash arg.map { |field, dir| + field = klass.attribute_alias(field).to_sym if klass.attribute_alias?(field) table[field].send(dir) } else diff --git a/activerecord/lib/active_record/scoping.rb b/activerecord/lib/active_record/scoping.rb index 0cf3d59985..3e43591672 100644 --- a/activerecord/lib/active_record/scoping.rb +++ b/activerecord/lib/active_record/scoping.rb @@ -27,6 +27,11 @@ module ActiveRecord end end + def initialize_internals_callback + super + populate_with_current_scope_attributes + end + # This class stores the +:current_scope+ and +:ignore_default_scope+ values # for different classes. The registry is stored as a thread local, which is # accessed through +ScopeRegistry.current+. diff --git a/activerecord/lib/active_record/scoping/named.rb b/activerecord/lib/active_record/scoping/named.rb index 2a5718f388..49cadb66d0 100644 --- a/activerecord/lib/active_record/scoping/named.rb +++ b/activerecord/lib/active_record/scoping/named.rb @@ -139,6 +139,12 @@ module ActiveRecord # Article.published.featured.latest_article # Article.featured.titles def scope(name, body, &block) + if dangerous_class_method?(name) + raise ArgumentError, "You tried to define a scope named \"#{name}\" " \ + "on the model \"#{self.name}\", but Active Record already defined " \ + "a class method with the same name." + end + extension = Module.new(&block) if block singleton_class.send(:define_method, name) do |*args| diff --git a/activerecord/lib/active_record/timestamp.rb b/activerecord/lib/active_record/timestamp.rb index e0541b7681..7178bed560 100644 --- a/activerecord/lib/active_record/timestamp.rb +++ b/activerecord/lib/active_record/timestamp.rb @@ -37,8 +37,8 @@ module ActiveRecord end def initialize_dup(other) # :nodoc: - clear_timestamp_attributes super + clear_timestamp_attributes end private @@ -71,7 +71,7 @@ module ActiveRecord end def should_record_timestamps? - self.record_timestamps && (!partial_writes? || changed? || (attributes.keys & self.class.serialized_attributes.keys).present?) + self.record_timestamps && (!partial_writes? || changed?) end def timestamp_attributes_for_create_in_model diff --git a/activerecord/lib/active_record/transactions.rb b/activerecord/lib/active_record/transactions.rb index 45313b5e75..c33ffeece0 100644 --- a/activerecord/lib/active_record/transactions.rb +++ b/activerecord/lib/active_record/transactions.rb @@ -6,9 +6,6 @@ module ActiveRecord extend ActiveSupport::Concern ACTIONS = [:create, :destroy, :update] - class TransactionError < ActiveRecordError # :nodoc: - end - included do define_callbacks :commit, :rollback, terminator: ->(_, result) { result == false }, @@ -243,15 +240,14 @@ module ActiveRecord def set_options_for_callbacks!(args) options = args.last if options.is_a?(Hash) && options[:on] - assert_valid_transaction_action(options[:on]) - options[:if] = Array(options[:if]) fire_on = Array(options[:on]) + assert_valid_transaction_action(fire_on) + options[:if] = Array(options[:if]) options[:if] << "transaction_include_any_action?(#{fire_on})" end end def assert_valid_transaction_action(actions) - actions = Array(actions) if (actions - ACTIONS).any? raise ArgumentError, ":on conditions for after_commit and after_rollback callbacks have to be one of #{ACTIONS.join(",")}" end @@ -277,6 +273,10 @@ module ActiveRecord with_transaction_returning_status { super } end + def touch(*) #:nodoc: + with_transaction_returning_status { super } + end + # Reset id and @new_record if the transaction rolls back. def rollback_active_record_state! remember_transaction_record_state |