断言序列号数据查询结果

Controller/SensorGateway/GatewayDeviceController.py

@@ -229,6 +229,7 @@ class GatewayDeviceView(View):
                         # 查询网关序列号,确定MQTT主题
                         sub_device_qs = GatewaySubDevice.objects.filter(id=sub_id_list[0]).\
                             values('device__serial_number')
+                        assert sub_device_qs.exists()
                         serial_number = sub_device_qs[0]['device__serial_number']
                         topic_name = SMART_SCENE_TOPIC.format(serial_number)