derp herp

    def _pool_check(self, session, pool_id, listener_id=None,
                    lb_id=None):
        """Sanity checks for default_pool_id if specified."""
        # Pool must exist on same loadbalancer as listener
        self.model_class = models.Pool
        db_pool = self.get(session, id=pool_id)
        if listener_id:
            # lb_subquery = (session.query(self.model_class.load_balancer_id).
            #                filter_by(id=listener_id).subquery())
            db_listener = self.get(session, id=listener_id)
            if db_listener.load_balancer.id != db_pool.load_balancer.id:
                db_pool = None
        elif lb_id:
            # pool_db = (session.query(models.Pool).
            #            filter_by(id=pool_id).
            #            filter_by(load_balancer_id=lb_id).first())
            self.model_class = models.LoadBalancer
            db_lb = self.get(session, id=lb_id)
            if db_lb.id != db_pool.load_balancer.id:
                db_pool = None
        if not db_pool:
            raise exceptions.NotFound(
                resource=data_models.Pool._name(), id=pool_id)