支持attr

app/Modules/Admin/Services/CategoryService.php

@@ -77,6 +77,10 @@ class CategoryService extends BaseService
     {
         $category = Category::findOrFail($params['id']);
 
+        if ($category->level == 1) {
+            throw new ClientException("一级类目不能删除");
+        }
+
         if ($count = Category::where("parent_id", $category->id)->count() > 0) {
             throw new ClientException("该类目下还有{$count}个子分类，请先删除子类目");
         }