fix:修改根据传感器类型获取传感器设备时查询结果为空导致的bug

snowy-plugin/snowy-plugin-coldchain/src/main/java/vip/xiaonuo/coldchain/modular/monitordevice/service/impl/MonitorDeviceServiceImpl.java

@@ -342,6 +342,10 @@ public class MonitorDeviceServiceImpl extends ServiceImpl<MonitorDeviceMapper, M
         List<MonitorDeviceType> deviceTypeList = monitorDeviceTypeService.list(typeQueryWrapper);
         List<String> modelNameList = deviceTypeList.stream().map(MonitorDeviceType::getCode).toList();
 
+        if (modelNameList.isEmpty()) {
+            return null;
+        }
+
         //查询设备列表
         LambdaQueryWrapper<MonitorDevice> deviceQueryWrapper = new LambdaQueryWrapper<>();
         deviceQueryWrapper.in(MonitorDevice::getModelName, modelNameList);