=改为in

app/admin/controller/Action.php

@@ -210,7 +210,7 @@ class Action extends BaseController
         }
 
         $child_where = [["pid", "<>", 0], ['status', "=", 1], ["is_del", "=", 0]];
-        if (isset($post['level']) && $post['level'] !== '') $child_where[] = ['level', '=', $post['level']];
+        if (isset($post['level']) && $post['level'] !== '') $child_where[] = ['level', 'in', $post['level']];
 
         $child = Db::name("admin_menu")
             ->where($child_where)