fix(装备列装模块): 修改列装解绑出现500

dev-packing/src/main/java/com/tykj/dev/device/packing/service/impl/PackingLibraryServiceImpl.java

@@ -977,6 +977,7 @@ public class PackingLibraryServiceImpl implements PackingLibraryService {
         if (packingLibrary.getIsPart() == 1) {
             //说明是附件目录
             List<DeviceLibrary> deviceLibraries = deviceLibraryService.findAllByPackingId(packingLibrary.getId());
+            if (deviceLibraries.size()>0){
                 List<Integer> deviceIds = deviceLibraries.stream().map(DeviceLibrary::getId).collect(Collectors.toList());
                 //将装备的父id全部置空
                 Integer userId = userUtils.getCurrentUserId();
@@ -995,6 +996,7 @@ public class PackingLibraryServiceImpl implements PackingLibraryService {
                     deviceLogService.addAllLog(deviceLogDtos);
                 });
             }
+        }
         //修改列装
         packingLibrary.setPartParentId(null);
         PackingLog packingLog = new PackingLog();