From 976ef40aefc92a30ca44a1b0322e5b46e32c0d91 Mon Sep 17 00:00:00 2001 From: Guillaume Malette Date: Tue, 22 May 2018 15:58:22 -0400 Subject: Rollback parent transaction when children fails to update (#32796) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit * Rollback parent transaction when children fails to update Rails supports autosave associations on the owner of a `has_many` relationship. In certain situation, if the children of the association fail to save, the parent is not rolled back. ```ruby class Employee < ActiveRecord::Base end class Company < ActiveRecord::Base has_many(:employees) end company = Company.new employee = company.employees.new company.save ``` In the previous example, if the Employee failed to save, the Company will not be rolled back. It will remain in the database with no associated Employee. I expect the `company.save` call to be atomic, and either create all or none of the records. The persistance of the Company already starts a transaction that nests it's children. However, it didn't track the success or failure of it's children in this very situation, and the outermost transaction is not rolled back. This PR makes the change to track the success of the child insertion and rollback the parent if any of the children fail. * Change the test to reflect what we expect Once #32862 is merged, rolling back a record will rollback it's state to match the state before the database changes were applied * Use only the public API to express the tests * Refactor to avoid reassigning saved for nested reflections [Guillaume Malette + Rafael Mendonça França] --- activerecord/lib/active_record/autosave_association.rb | 7 +++++-- activerecord/test/cases/autosave_association_test.rb | 12 ++++++++++++ activerecord/test/models/company.rb | 5 +++++ 3 files changed, 22 insertions(+), 2 deletions(-) diff --git a/activerecord/lib/active_record/autosave_association.rb b/activerecord/lib/active_record/autosave_association.rb index a1250c3835..9575cc24c8 100644 --- a/activerecord/lib/active_record/autosave_association.rb +++ b/activerecord/lib/active_record/autosave_association.rb @@ -400,8 +400,11 @@ module ActiveRecord if autosave != false && (@new_record_before_save || record.new_record?) if autosave saved = association.insert_record(record, false) - else - association.insert_record(record) unless reflection.nested? + elsif !reflection.nested? + association_saved = association.insert_record(record) + if reflection.validate? + saved = association_saved + end end elsif autosave saved = record.save(validate: false) diff --git a/activerecord/test/cases/autosave_association_test.rb b/activerecord/test/cases/autosave_association_test.rb index 0c212ecc22..7355f4cd62 100644 --- a/activerecord/test/cases/autosave_association_test.rb +++ b/activerecord/test/cases/autosave_association_test.rb @@ -517,6 +517,18 @@ class TestDefaultAutosaveAssociationOnAHasManyAssociation < ActiveRecord::TestCa assert_not_predicate new_firm, :persisted? end + def test_adding_unsavable_association + new_firm = Firm.new("name" => "A New Firm, Inc") + client = new_firm.clients.new("name" => "Apple") + client.throw_on_save = true + + assert_predicate client, :valid? + assert_predicate new_firm, :valid? + assert_not new_firm.save + assert_not_predicate new_firm, :persisted? + assert_not_predicate client, :persisted? + end + def test_invalid_adding_with_validate_false firm = Firm.first client = Client.new diff --git a/activerecord/test/models/company.rb b/activerecord/test/models/company.rb index fc6488f729..6219f57fa1 100644 --- a/activerecord/test/models/company.rb +++ b/activerecord/test/models/company.rb @@ -145,6 +145,11 @@ class Client < Company raise RaisedOnSave if raise_on_save end + attr_accessor :throw_on_save + before_save do + throw :abort if throw_on_save + end + class RaisedOnDestroy < RuntimeError; end attr_accessor :raise_on_destroy before_destroy do -- cgit v1.2.3