update 空测点id,提前返回

configHelper.go

@@ -167,6 +167,9 @@ func (the *ConfigHelper) GetDeviceStationIds(deviceId string) ([]int, error) {
 		k := fmt.Sprintf("%s:%s", redisKey.Device_stationIds, deviceId)
 		//var deviceMeta common_models.DeviceMeta
 		s := the.redisHelper.Get(k)
+		if s == "" {
+			return result, errors.New(fmt.Sprintf("redis 中无key=[%s] 缓存", k))
+		}
 		err = json.Unmarshal([]byte(s), &result)
 		//err = the.redisHelper.GetObj(k, &result)
 	}