Don't autosave unchanged has_one through records

1 files changed, 24 insertions, 0 deletions

diff --git a/activerecord/test/cases/autosave_association_test.rb b/activerecord/test/cases/autosave_association_test.rb
index 025cdbeba9..b2a7d3956d 100644
--- a/activerecord/test/cases/autosave_association_test.rb
+++ b/activerecord/test/cases/autosave_association_test.rb
@@ -19,6 +19,9 @@ require 'models/treasure'
 require 'models/eye'
 require 'models/electron'
 require 'models/molecule'
+require 'models/member'
+require 'models/member_detail'
+require 'models/organization'
 
 class TestAutosaveAssociationsInGeneral < ActiveRecord::TestCase
   def test_autosave_validation
@@ -1116,6 +1119,27 @@ class TestAutosaveAssociationOnAHasOneAssociation < ActiveRecord::TestCase
   end
 end
 
+class TestAutosaveAssociationOnAHasOneThroughAssociation < ActiveRecord::TestCase
+  self.use_transactional_fixtures = false unless supports_savepoints?
+
+  def setup
+    super
+    organization = Organization.create
+    @member = Member.create
+    MemberDetail.create(organization: organization, member: @member)
+  end
+
+  def test_should_not_has_one_through_model
+    class << @member.organization
+      def save(*args)
+        super
+        raise 'Oh noes!'
+      end
+    end
+    assert_nothing_raised { @member.save }
+  end
+end
+
 class TestAutosaveAssociationOnABelongsToAssociation < ActiveRecord::TestCase
   self.use_transactional_fixtures = false unless supports_savepoints?