public function execute(HTTPRequestCustom $request)
 {
     $id = $request->get_int('id', null);
     $code = -1;
     if ($id !== null) {
         $extended_field = new ExtendedField();
         $extended_field->set_id($id);
         $exist_field = ExtendedFieldsDatabaseService::check_field_exist_by_id($extended_field);
         if ($exist_field) {
             ExtendedFieldsService::delete_by_id($id);
             $code = $id;
         }
     }
     return new JSONResponse(array('code' => $code));
 }