manjeetbhati

query = self._get_collection_query(context, agent_model.Agent,
                                           filters=filters)
        columns = (agent_obj.Agent.admin_state_up,
                   agent_obj.Agent.availability_zone,
                   agent_obj.Agent.agent_type)
        for agent in query.with_entities(*columns).group_by(*columns):

manjeetbhati

 sqlalchemy.exc.InvalidRequestError: One or more mappers failed to initialize - can't proceed with initialization of other mappers.  Original excep
tion was: Multiple classes found for path "Router" in the registry of this declarative base. Please use a fully module-qualified path.