/**
  * Remove the specified resource from storage.
  *
  * @param int $id            
  * @return Response
  */
 public function destroy($id)
 {
     if (Article::destroy($id)) {
         $this->clear_articels_cache();
         $message = "删除文章成功";
     } else {
         $message = "删除文章失败";
     }
     return redirect('/admin/article')->with('message', $message);
 }