/**
  * Update the specified resource in storage.
  *
  * @param  \Illuminate\Http\Request $request
  * @param  int $id
  * @return \Illuminate\Http\Response
  */
 public function update(Request $request, $id)
 {
     $authObj = new AuthGroup();
     $data = $request->all();
     $validator = $authObj->operationValidation();
     unset($data['_token']);
     if ($validator->fails()) {
         return redirect()->back()->withErrors($validator->messages())->with($data);
     }
     try {
         DB::transaction(function () use($id, $data) {
             AuthGroupRelaionship::deleteAuthGroupRelationshipGroupLabel($id);
             AuthGroupRelaionship::saveAddAuthGroupRelationship($data['group_label'], $data['auth']);
             AuthGroup::find($id)->update($data);
         });
         return redirect()->action('Admin\\AuthGroupController@index')->with(array('dialog' => array('title' => '修改权限组成功', 'message' => $data)));
     } catch (\Exception $e) {
         return redirect()->back()->withErrors(['error' => '修改权限组失败, 请重试'])->with($data);
     }
 }