1 files changed, 9 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/associations/association.rb b/activerecord/lib/active_record/associations/association.rb
index c3aee90124..daadc8aa81 100644
--- a/activerecord/lib/active_record/associations/association.rb
+++ b/activerecord/lib/active_record/associations/association.rb
@@ -224,6 +224,15 @@ module ActiveRecord
         def association_class
           @reflection.klass
         end
+
+        def build_record(attributes, options)
+          reflection.build_association(attributes, options) do |record|
+            record.assign_attributes(
+              create_scope.except(*record.changed),
+              :without_protection => true
+            )
+          end
+        end
     end
   end
 end