1 files changed, 7 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/associations/foreign_association.rb b/activerecord/lib/active_record/associations/foreign_association.rb
index 40010cde03..59af6f54c3 100644
--- a/activerecord/lib/active_record/associations/foreign_association.rb
+++ b/activerecord/lib/active_record/associations/foreign_association.rb
@@ -9,5 +9,12 @@ module ActiveRecord::Associations
         false
       end
     end
+
+    def nullified_owner_attributes
+      Hash.new.tap do |attrs|
+        attrs[reflection.foreign_key] = nil
+        attrs[reflection.type] = nil if reflection.type.present?
+      end
+    end
   end
 end