fix: 处理null问题

buhuazhen

2026-06-01 facbfd2b1a0eb1ea971b699def8c85a43c5fa7fa

 src/main/java/com/ruoyi/device/mapper/DeviceMaintenanceMapper.java

@@ -6,7 +6,6 @@
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.ruoyi.device.dto.DeviceMaintenanceDto;
import com.ruoyi.device.dto.DeviceRepairDto;
import com.ruoyi.device.pojo.DeviceMaintenance;
import org.apache.ibatis.annotations.Mapper;