From 9c771a9608f54ebdfcb6fca819c83038489ce50d Mon Sep 17 00:00:00 2001 From: Eloy Duran Date: Tue, 15 Dec 2009 16:40:02 +0100 Subject: Make sure to not add autosave callbacks multiple times. [#3575 state:resolved] This makes sure that, in a HABTM association, only one join record is craeted. --- .../lib/active_record/autosave_association.rb | 40 ++++++++++++++-------- .../lib/active_record/nested_attributes.rb | 4 +-- .../test/cases/autosave_association_test.rb | 29 ++++++++++++++++ activerecord/test/cases/nested_attributes_test.rb | 9 +++++ 4 files changed, 65 insertions(+), 17 deletions(-) (limited to 'activerecord') diff --git a/activerecord/lib/active_record/autosave_association.rb b/activerecord/lib/active_record/autosave_association.rb index c0d8904bc8..44c668b619 100644 --- a/activerecord/lib/active_record/autosave_association.rb +++ b/activerecord/lib/active_record/autosave_association.rb @@ -155,6 +155,13 @@ module ActiveRecord # Adds a validate and save callback for the association as specified by # the +reflection+. + # + # For performance reasons, we don't check whether to validate at runtime, + # but instead only define the method and callback when needed. However, + # this can change, for instance, when using nested attributes. Since we + # don't want the callbacks to get defined multiple times, there are + # guards that check if the save or validation methods have already been + # defined before actually defining them. def add_autosave_association_callbacks(reflection) save_method = "autosave_associated_records_for_#{reflection.name}" validation_method = "validate_associated_records_for_#{reflection.name}" @@ -162,28 +169,33 @@ module ActiveRecord case reflection.macro when :has_many, :has_and_belongs_to_many - before_save :before_save_collection_association + unless method_defined?(save_method) + before_save :before_save_collection_association - define_method(save_method) { save_collection_association(reflection) } - # Doesn't use after_save as that would save associations added in after_create/after_update twice - after_create save_method - after_update save_method + define_method(save_method) { save_collection_association(reflection) } + # Doesn't use after_save as that would save associations added in after_create/after_update twice + after_create save_method + after_update save_method + end - if force_validation || (reflection.macro == :has_many && reflection.options[:validate] != false) + if !method_defined?(validation_method) && + (force_validation || (reflection.macro == :has_many && reflection.options[:validate] != false)) define_method(validation_method) { validate_collection_association(reflection) } validate validation_method end else - case reflection.macro - when :has_one - define_method(save_method) { save_has_one_association(reflection) } - after_save save_method - when :belongs_to - define_method(save_method) { save_belongs_to_association(reflection) } - before_save save_method + unless method_defined?(save_method) + case reflection.macro + when :has_one + define_method(save_method) { save_has_one_association(reflection) } + after_save save_method + when :belongs_to + define_method(save_method) { save_belongs_to_association(reflection) } + before_save save_method + end end - if force_validation + if !method_defined?(validation_method) && force_validation define_method(validation_method) { validate_single_association(reflection) } validate validation_method end diff --git a/activerecord/lib/active_record/nested_attributes.rb b/activerecord/lib/active_record/nested_attributes.rb index ca3110a374..386f0e7ca7 100644 --- a/activerecord/lib/active_record/nested_attributes.rb +++ b/activerecord/lib/active_record/nested_attributes.rb @@ -235,7 +235,7 @@ module ActiveRecord end reflection.options[:autosave] = true - + add_autosave_association_callbacks(reflection) self.nested_attributes_options[association_name.to_sym] = options if options[:reject_if] == :all_blank @@ -250,8 +250,6 @@ module ActiveRecord assign_nested_attributes_for_#{type}_association(:#{association_name}, attributes) end }, __FILE__, __LINE__ - - add_autosave_association_callbacks(reflection) else raise ArgumentError, "No association found for name `#{association_name}'. Has it been defined yet?" end diff --git a/activerecord/test/cases/autosave_association_test.rb b/activerecord/test/cases/autosave_association_test.rb index 9164701601..803e5b25b1 100644 --- a/activerecord/test/cases/autosave_association_test.rb +++ b/activerecord/test/cases/autosave_association_test.rb @@ -31,11 +31,40 @@ class TestAutosaveAssociationsInGeneral < ActiveRecord::TestCase assert base.valid_keys_for_has_and_belongs_to_many_association.include?(:autosave) end + def test_should_not_add_the_same_callbacks_multiple_times_for_has_one + assert_no_difference_when_adding_callbacks_twice_for Pirate, :ship + end + + def test_should_not_add_the_same_callbacks_multiple_times_for_belongs_to + assert_no_difference_when_adding_callbacks_twice_for Ship, :pirate + end + + def test_should_not_add_the_same_callbacks_multiple_times_for_has_many + assert_no_difference_when_adding_callbacks_twice_for Pirate, :birds + end + + def test_should_not_add_the_same_callbacks_multiple_times_for_has_and_belongs_to_many + assert_no_difference_when_adding_callbacks_twice_for Pirate, :parrots + end + private def base ActiveRecord::Base end + + def assert_no_difference_when_adding_callbacks_twice_for(model, association_name) + reflection = model.reflect_on_association(association_name) + assert_no_difference "callbacks_for_model(#{model.name}).length" do + model.send(:add_autosave_association_callbacks, reflection) + end + end + + def callbacks_for_model(model) + model.instance_variables.grep(/_callbacks$/).map do |ivar| + model.instance_variable_get(ivar) + end.flatten + end end class TestDefaultAutosaveAssociationOnAHasOneAssociation < ActiveRecord::TestCase diff --git a/activerecord/test/cases/nested_attributes_test.rb b/activerecord/test/cases/nested_attributes_test.rb index 53fd168e1b..5367907fb7 100644 --- a/activerecord/test/cases/nested_attributes_test.rb +++ b/activerecord/test/cases/nested_attributes_test.rb @@ -371,6 +371,15 @@ module NestedAttributesOnACollectionAssociationTests assert_respond_to @pirate, association_setter end + def test_should_save_only_one_association_on_create + pirate = Pirate.create!({ + :catchphrase => 'Arr', + association_getter => { 'foo' => { :name => 'Grace OMalley' } } + }) + + assert_equal 1, pirate.reload.send(@association_name).count + end + def test_should_take_a_hash_with_string_keys_and_assign_the_attributes_to_the_associated_models @alternate_params[association_getter].stringify_keys! @pirate.update_attributes @alternate_params -- cgit v1.2.3