fix: 修复菜单修改问题

nladmin-system/nlsso-server/src/main/java/org/nl/system/service/menu/impl/SysMenuServiceImpl.java

@@ -190,8 +190,9 @@ public class SysMenuServiceImpl extends ServiceImpl<SysMenuMapper, SysMenu> impl
     public void update(SysMenu resources) {
         String menuId = resources.getMenu_id();
         SysMenu menu = baseMapper.selectById(menuId);
-        List<String> allChildIds = Arrays.asList(baseMapper.findAllChild(menuId).split(","));
-        if (allChildIds.contains(resources.getPid())){
+        String allChild = baseMapper.findAllChild(menuId); // 获取当前菜单的所有子菜单
+        List<String> allChildIds = ObjectUtil.isNotEmpty(allChild)?Arrays.asList(allChild.split(",")):null;
+        if (ObjectUtil.isNotEmpty(allChildIds) && allChildIds.contains(resources.getPid())){
             throw new BadRequestException("上级不能为自己或自己的下级");
         }
         if (resources.getIframe()) {