315       raise InvalidArgumentError

   315       raise InvalidArgumentError

   316 

   316 

   317     query = db.Query(self._model)

   317     query = db.Query(self._model)

   318 

   318 

   319     for key, value in filter.iteritems():

   319     for key, value in filter.iteritems():

   320       if isinstance(value, list):

   322       if isinstance(value, list):

   321         op = '%s IN' % key

   323         op = '%s IN' % key

   322         query.filter(op, value)

   324         query.filter(op, value)

   323       else:

   325       else:

   324         query.filter(key, value)

   326         query.filter(key, value)