diff --git a/app/controllers/formbuilder/forms_controller.rb b/app/controllers/formbuilder/forms_controller.rb
index e0aa1de..f7e9fa5 100644
--- a/app/controllers/formbuilder/forms_controller.rb
+++ b/app/controllers/formbuilder/forms_controller.rb
@@ -32,7 +32,7 @@ def update
         rf.cid = cids[rf.id]
       end
 
-      render json: @form.response_fields.to_json(methods: [:field_type, :cid])
+      render json: @form.response_fields_json
     end
 
     private
diff --git a/app/models/formbuilder/form.rb b/app/models/formbuilder/form.rb
index 85f6d89..fb3e58a 100644
--- a/app/models/formbuilder/form.rb
+++ b/app/models/formbuilder/form.rb
@@ -8,5 +8,9 @@ def input_fields
       response_fields.reject { |rf| !rf.input_field }
     end
 
+    def response_fields_json
+      self.response_fields.to_json(methods: [:field_type, :cid])
+    end
+
   end
 end