diff options
Diffstat (limited to 'activerecord/lib/active_record/nested_attributes.rb')
| -rw-r--r-- | activerecord/lib/active_record/nested_attributes.rb | 106 |
1 files changed, 78 insertions, 28 deletions
diff --git a/activerecord/lib/active_record/nested_attributes.rb b/activerecord/lib/active_record/nested_attributes.rb index e652296e2c..522c0cfc9f 100644 --- a/activerecord/lib/active_record/nested_attributes.rb +++ b/activerecord/lib/active_record/nested_attributes.rb @@ -2,6 +2,7 @@ require 'active_support/core_ext/hash/except' require 'active_support/core_ext/object/try' require 'active_support/core_ext/object/blank' require 'active_support/core_ext/hash/indifferent_access' +require 'active_support/core_ext/class/attribute' module ActiveRecord module NestedAttributes #:nodoc: @@ -11,7 +12,7 @@ module ActiveRecord extend ActiveSupport::Concern included do - class_inheritable_accessor :nested_attributes_options, :instance_writer => false + class_attribute :nested_attributes_options, :instance_writer => false self.nested_attributes_options = {} end @@ -25,7 +26,7 @@ module ActiveRecord # # The attribute writer is named after the association, which means that # in the following example, two new methods are added to your model: - # + # # <tt>author_attributes=(attributes)</tt> and # <tt>pages_attributes=(attributes)</tt>. # @@ -190,6 +191,34 @@ module ActiveRecord # destruction, are saved and destroyed automatically and atomically when # the parent model is saved. This happens inside the transaction initiated # by the parents save method. See ActiveRecord::AutosaveAssociation. + # + # === Using with attr_accessible + # + # The use of <tt>attr_accessible</tt> can interfere with nested attributes + # if you're not careful. For example, if the <tt>Member</tt> model above + # was using <tt>attr_accessible</tt> like this: + # + # attr_accessible :name + # + # You would need to modify it to look like this: + # + # attr_accessible :name, :posts_attributes + # + # === Validating the presence of a parent model + # + # If you want to validate that a child record is associated with a parent + # record, you can use <tt>validates_presence_of</tt> and + # <tt>inverse_of</tt> as this example illustrates: + # + # class Member < ActiveRecord::Base + # has_many :posts, :inverse_of => :member + # accepts_nested_attributes_for :posts + # end + # + # class Post < ActiveRecord::Base + # belongs_to :member, :inverse_of => :posts + # validates_presence_of :member + # end module ClassMethods REJECT_ALL_BLANK_PROC = proc { |attributes| attributes.all? { |_, value| value.blank? } } @@ -240,7 +269,11 @@ module ActiveRecord if reflection = reflect_on_association(association_name) reflection.options[:autosave] = true add_autosave_association_callbacks(reflection) + + nested_attributes_options = self.nested_attributes_options.dup nested_attributes_options[association_name.to_sym] = options + self.nested_attributes_options = nested_attributes_options + type = (reflection.collection? ? :collection : :one_to_one) # def pirate_attributes=(attributes) @@ -287,18 +320,15 @@ module ActiveRecord # update_only is true, and a <tt>:_destroy</tt> key set to a truthy value, # then the existing record will be marked for destruction. def assign_nested_attributes_for_one_to_one_association(association_name, attributes) - options = nested_attributes_options[association_name] + options = self.nested_attributes_options[association_name] attributes = attributes.with_indifferent_access - check_existing_record = (options[:update_only] || !attributes['id'].blank?) - if check_existing_record && (record = send(association_name)) && + if (options[:update_only] || !attributes['id'].blank?) && (record = send(association_name)) && (options[:update_only] || record.id.to_s == attributes['id'].to_s) - assign_to_or_mark_for_destruction(record, attributes, options[:allow_destroy]) + assign_to_or_mark_for_destruction(record, attributes, options[:allow_destroy]) unless call_reject_if(association_name, attributes) - elsif attributes['id'] - existing_record = self.class.reflect_on_association(association_name).klass.find(attributes['id']) - assign_to_or_mark_for_destruction(existing_record, attributes, options[:allow_destroy]) - self.send(association_name.to_s+'=', existing_record) + elsif attributes['id'].present? + raise_nested_attributes_record_not_found(association_name, attributes['id']) elsif !reject_new_record?(association_name, attributes) method = "build_#{association_name}" @@ -338,7 +368,7 @@ module ActiveRecord # { :id => '2', :_destroy => true } # ]) def assign_nested_attributes_for_collection_association(association_name, attributes_collection) - options = nested_attributes_options[association_name] + options = self.nested_attributes_options[association_name] 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})" @@ -349,16 +379,21 @@ module ActiveRecord end if attributes_collection.is_a? Hash - attributes_collection = attributes_collection.sort_by { |index, _| index.to_i }.map { |_, attributes| attributes } + keys = attributes_collection.keys + attributes_collection = if keys.include?('id') || keys.include?(:id) + Array.wrap(attributes_collection) + else + attributes_collection.sort_by { |i, _| i.to_i }.map { |_, attributes| attributes } + end end - association = send(association_name) + association = association(association_name) existing_records = if association.loaded? - association.to_a + association.target else attribute_ids = attributes_collection.map {|a| a['id'] || a[:id] }.compact - attribute_ids.present? ? association.all(:conditions => {association.primary_key => attribute_ids}) : [] + attribute_ids.empty? ? [] : association.scoped.where(association.klass.primary_key => attribute_ids) end attributes_collection.each do |attributes| @@ -368,16 +403,31 @@ module ActiveRecord unless reject_new_record?(association_name, attributes) association.build(attributes.except(*UNASSIGNABLE_KEYS)) end - elsif existing_records.count == 0 #Existing record but not yet associated existing_record = self.class.reflect_on_association(association_name).klass.find(attributes['id']) - association.send(:add_record_to_target_with_callbacks, existing_record) unless association.loaded? - assign_to_or_mark_for_destruction(existing_record, attributes, options[:allow_destroy]) - + if !call_reject_if(association_name, attributes) + association.send(:add_record_to_target_with_callbacks, existing_record) if !association.loaded? + assign_to_or_mark_for_destruction(existing_record, attributes, options[:allow_destroy]) + end elsif existing_record = existing_records.detect { |record| record.id.to_s == attributes['id'].to_s } - association.send(:add_record_to_target_with_callbacks, existing_record) unless association.loaded? - assign_to_or_mark_for_destruction(existing_record, attributes, options[:allow_destroy]) + unless association.loaded? || call_reject_if(association_name, attributes) + # Make sure we are operating on the actual object which is in the association's + # proxy_target array (either by finding it, or adding it if not found) + target_record = association.target.detect { |record| record == existing_record } + + if target_record + existing_record = target_record + else + association.add_to_target(existing_record) + end + end + + if !call_reject_if(association_name, attributes) + assign_to_or_mark_for_destruction(existing_record, attributes, options[:allow_destroy]) + end + else + raise_nested_attributes_record_not_found(association_name, attributes['id']) end end end @@ -385,11 +435,8 @@ module ActiveRecord # Updates a record with the +attributes+ or marks it for destruction if # +allow_destroy+ is +true+ and has_destroy_flag? returns +true+. def assign_to_or_mark_for_destruction(record, attributes, allow_destroy) - if has_destroy_flag?(attributes) && allow_destroy - record.mark_for_destruction - else - record.attributes = attributes.except(*UNASSIGNABLE_KEYS) - end + record.attributes = attributes.except(*UNASSIGNABLE_KEYS) + record.mark_for_destruction if has_destroy_flag?(attributes) && allow_destroy end # Determines if a hash contains a truthy _destroy key. @@ -397,7 +444,7 @@ module ActiveRecord ConnectionAdapters::Column.value_to_boolean(hash['_destroy']) end - # Determines if a new record should be built by checking for + # Determines if a new record should be build by checking for # has_destroy_flag? or if a <tt>:reject_if</tt> proc exists for this # association and evaluates to +true+. def reject_new_record?(association_name, attributes) @@ -405,7 +452,7 @@ module ActiveRecord end def call_reject_if(association_name, attributes) - case callback = nested_attributes_options[association_name][:reject_if] + case callback = self.nested_attributes_options[association_name][:reject_if] when Symbol method(callback).arity == 0 ? send(callback) : send(callback, attributes) when Proc @@ -413,5 +460,8 @@ module ActiveRecord end 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}" + end end end |