From 9de28419b1e6312e911eea0c315f326f498b195c Mon Sep 17 00:00:00 2001 From: Johnny Holton Date: Wed, 10 Apr 2013 23:29:19 -0400 Subject: destroys association records before saving/inserting new association records fixes bug introduced by #3329 These are the conditions necessary to reproduce the bug: - For an association, autosave => true. - An association record is being destroyed - A new association record is being created. - There is a unique index one of the association's fields. - The record being created has the same value as the record being destroyed on the indexed field. Before, the deletion of records was postponed until after all insertions/saves. Therefore the new record with the identical value in the indexed field caused a non-unique value error to be thrown at the database level. With this fix, the deletions happen first, before the insertions/saves. Therefore the record with the duplicate value is gone from the database before the new record is created, thereby avoiding the non-uniuqe value error. --- activerecord/test/cases/autosave_association_test.rb | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'activerecord/test/cases') diff --git a/activerecord/test/cases/autosave_association_test.rb b/activerecord/test/cases/autosave_association_test.rb index 536ff4882c..552bbd3f52 100644 --- a/activerecord/test/cases/autosave_association_test.rb +++ b/activerecord/test/cases/autosave_association_test.rb @@ -764,6 +764,20 @@ class TestDestroyAsPartOfAutosaveAssociation < ActiveRecord::TestCase assert_equal 2, @pirate.birds.reload.length end + def test_should_save_new_record_that_has_same_value_as_existing_record_marked_for_destruction_on_field_that_has_unique_index + Bird.connection.add_index :birds, :name, unique: true + + 3.times { |i| @pirate.birds.create(name: "birds_#{i}") } + + @pirate.birds[0].mark_for_destruction + @pirate.birds.build(name: @pirate.birds[0].name) + @pirate.save! + + assert_equal 3, @pirate.birds.reload.length + ensure + Bird.connection.remove_index :birds, column: :name + end + # Add and remove callbacks tests for association collections. %w{ method proc }.each do |callback_type| define_method("test_should_run_add_callback_#{callback_type}s_for_has_many") do -- cgit v1.2.3