diff --git a/app/Admin/Services/BaseService.php b/app/Admin/Services/BaseService.php
index a0adc38..06d3dee 100644
--- a/app/Admin/Services/BaseService.php
+++ b/app/Admin/Services/BaseService.php
@@ -42,7 +42,7 @@ class BaseService extends AdminService
             $query->filter(request()->input(), $filter);
         }
 
-        return $query->orderByDesc($model->getUpdatedAtColumn() ?? $model->getKeyName());
+        return $query->orderByDesc($model->getKeyName());
     }
 
     public function list()
@@ -79,7 +79,7 @@ class BaseService extends AdminService
     public function update($primaryKey, $data): bool
     {
         $data = $this->resloveData($data);
-        $model = $this->query()->whereKey($primaryKey)->first();
+        $model = $this->query()->whereKey($primaryKey)->firstOrFail();
         $validate = $this->validate($data, $model->id);
         if ($validate !== true) {
             $this->setError($validate);
@@ -89,6 +89,17 @@ class BaseService extends AdminService
         return $model->update($data);
     }
 
+    public function delete(string $ids): mixed
+    {
+        $id = explode(',', $ids);
+        $result = $this->preDelete($id);
+        if ($result !== true) {
+            $this->setError($validate);
+            return false;
+        }
+        return $this->query()->whereIn($this->primaryKey(), $id)->delete();
+    }
+
     /**
      * 处理表单数据
      * 
@@ -111,4 +122,15 @@ class BaseService extends AdminService
     {
         return true;
     }
+
+    /**
+     * 删除的前置方法
+     * 
+     * @param array $ids 主键id
+     * @return mixed true: 继续后续操作, string: 中断操作, 返回错误提示
+     */
+    public function preDelete(array $ids)
+    {
+        return true;
+    }
 }