python - @EndpointsAliasProperty and @Model.query_method causes BadRequestError(Key path element must not be incomplete:...) -

hey right i'm developing backend api using google protorpc , endpoints. i'm using endpoints-proto-datastore library.

so strange things happen here, here endpointsmodel class

class assetdata(endpointsmodel):     type = msgprop.enumproperty(assettype, indexed=true)      def auth_id_set(self, value):         if applicationid.get_by_id(value) none:             raise endpoints.unauthorizedexception('no auth_id')          self._auth_id = value      @endpointsaliasproperty(required=true, setter=auth_id_set, property_type=messages.integerfield)     def auth_id(self):         return self._auth_id      def app_id_set(self, value):         if applicationid.query(applicationid.app_id == value).get() none:             raise endpoints.unauthorizedexception('wrong app_id')          self._app_id = value          if self.check_auth_app_id_pair(self.auth_id, value):             self._app_id = value         else:             raise endpoints.badrequestexception('auth_id , app_id mismatch')      @endpointsaliasproperty(required=true, setter=app_id_set)     def app_id(self):         return self._app_id      @staticmethod     def check_auth_app_id_pair(authen_id, applic_id):         dat = applicationid.get_by_id(authen_id)         if dat.app_id != applic_id:             return false         else:             return true 

and api class

@endpoints.api(...) class assetdatabaseapi(remote.service):      @assetdata.query_method(query_fields=('limit', 'order', 'pagetoken', 'type', 'auth_id', 'app_id'),                             path='assets', http_method='get', name='assets.getassetmultiple')     def assets_get_multiple(self, query):         return query 

when deploy this, everytime tried access assets.getmultipleassets gives me error raised badrequesterror(key path element must not incomplete: [applicationid: ]). strangely enough happen method using @model.query_method, have other methods using same system using @model.method , runs ok.

if tried in development server, gives me runtimeerror: badrequesterror('missing key id/name',) if re-save .py file , retry it, work (sometimes not , re-save can make error happens again).

can tell me mistake? thanks

i think problem how call method - it's static method, have access through class, not instance (self):

    if assetdata.check_auth_app_id_pair(self.auth_id, value):         self._app_id = value     else:         raise endpoints.badrequestexception('auth_id , app_id mismatch')