fix(单位模块): 在修改单位信息的接口添加注释

dev-user/src/main/java/com/tykj/dev/device/user/subject/service/impl/UnitsServiceImpl.java

@@ -533,8 +533,11 @@ public class UnitsServiceImpl implements UnitsService {
         if (!units.getLevel().equals(unitsOld.getLevel())){
             units.setType(levelToType(units.getLevel()));
         }
-        Units parentUnitOld= findByParentUnit(units);
+        //原来上级单位对象
+        Units parentUnitOld= findByParentUnit(unitsOld);
+        //判断上级是否选择了上级单位id
         if (units.getParentUnitId()!=null){
+            //判断原来上级单位对象是否存在，以及是否于原来相等
            if (parentUnitOld==null ||!parentUnitOld.getUnitId().equals(units.getParentUnitId())){
                //查询需要修改的上级id
                Units parentUnitNow = unitsCache.findById(units.getParentUnitId());
@@ -550,6 +553,7 @@ public class UnitsServiceImpl implements UnitsService {
                 areaDao.save(oldArea);
             }
         }
+
         if (!unitsOld.getShowOrder().equals(units.getShowOrder())){
             int count=unitsCache.findAll().size();
             if (units.getShowOrder()>count){