Merge branch 'master' of git@github.com:rails/rails

activerecord/CHANGELOG

@@ -2,8 +2,6 @@
 
 * Change validates_uniqueness_of :case_sensitive option default back to true (from [9160]).  Love your database columns, don't LOWER them.  [rick]
 
-* Ensure that save on child object fails for invalid belongs_to association. Closes #11555. [rubyruy]
-
 * Add support for interleaving migrations by storing which migrations have run in the new schema_migrations table. Closes #11493 [jordi]
 
 * ActiveRecord::Base#sum defaults to 0 if no rows are returned.  Closes #11550 [kamal]

activerecord/lib/active_record/associations.rb

@@ -922,8 +922,6 @@ module ActiveRecord
           )
         end
 
-        add_single_associated_save_callbacks(reflection.name)
-
         configure_dependency_for_belongs_to(reflection)
       end
 

activerecord/test/cases/associations/belongs_to_associations_test.rb

@@ -377,16 +377,4 @@ class BelongsToAssociationsTest < ActiveRecord::TestCase
     assert companies(:first_client).readonly_firm.readonly?
   end
 
-  def test_save_fails_for_invalid_belongs_to
-    log = AuditLog.new
-    assert log.valid?
-
-    log.build_developer # Build invalid association
-    assert !log.developer.valid?
-    assert !log.valid?
-    assert_equal "is invalid", log.errors.on("developer")
-    
-    assert !log.save
-  end
-
 end