diff options
Diffstat (limited to 'activerecord/lib/active_record/nested_attributes.rb')
| -rw-r--r-- | activerecord/lib/active_record/nested_attributes.rb | 44 |
1 files changed, 37 insertions, 7 deletions
diff --git a/activerecord/lib/active_record/nested_attributes.rb b/activerecord/lib/active_record/nested_attributes.rb index d607f49e2b..8bdaeef924 100644 --- a/activerecord/lib/active_record/nested_attributes.rb +++ b/activerecord/lib/active_record/nested_attributes.rb @@ -229,6 +229,23 @@ module ActiveRecord # belongs_to :member, inverse_of: :posts # validates_presence_of :member # end + # + # For one-to-one nested associations, if you build the new (in-memory) + # child object yourself before assignment, then this module will not + # overwrite it, e.g.: + # + # class Member < ActiveRecord::Base + # has_one :avatar + # accepts_nested_attributes_for :avatar + # + # def avatar + # super || build_avatar(width: 200) + # end + # end + # + # member = Member.new + # member.avatar_attributes = {icon: 'sad'} + # member.avatar.width # => 200 module ClassMethods REJECT_ALL_BLANK_PROC = proc { |attributes| attributes.all? { |key, value| key == '_destroy' || value.blank? } } @@ -288,6 +305,11 @@ module ActiveRecord reflection.options[:autosave] = true add_autosave_association_callbacks(reflection) + # Clear cached values of any inverse associations found in the + # reflection and prevent the reflection from finding inverses + # automatically in the future. + reflection.remove_automatic_inverse_of! + nested_attributes_options = self.nested_attributes_options.dup nested_attributes_options[association_name.to_sym] = options self.nested_attributes_options = nested_attributes_options @@ -356,20 +378,28 @@ module ActiveRecord def assign_nested_attributes_for_one_to_one_association(association_name, attributes) options = self.nested_attributes_options[association_name] attributes = attributes.with_indifferent_access + existing_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]) unless call_reject_if(association_name, attributes) + if (options[:update_only] || !attributes['id'].blank?) && existing_record && + (options[:update_only] || existing_record.id.to_s == attributes['id'].to_s) + assign_to_or_mark_for_destruction(existing_record, attributes, options[:allow_destroy]) unless call_reject_if(association_name, attributes) 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}" - if respond_to?(method) - send(method, attributes.except(*UNASSIGNABLE_KEYS)) + assignable_attributes = attributes.except(*UNASSIGNABLE_KEYS) + + if existing_record && existing_record.new_record? + existing_record.assign_attributes(assignable_attributes) + association(association_name).initialize_attributes(existing_record) else - raise ArgumentError, "Cannot build association `#{association_name}'. Are you trying to build a polymorphic one-to-one association?" + method = "build_#{association_name}" + if respond_to?(method) + send(method, assignable_attributes) + else + raise ArgumentError, "Cannot build association `#{association_name}'. Are you trying to build a polymorphic one-to-one association?" + end end end end |