/**
  * 搜索
  *
  * @param Request $request
  */
 public function getSearch(Request $request)
 {
     //接受参数
     $search = $request->get('search', '');
     $sort = $request->get('sort', 'id');
     $order = $request->get('order', 'asc');
     $limit = $request->get('limit', 0);
     $offset = $request->get('offset', config('config.page_limit'));
     //解析params
     parse_str($search);
     //组合查询条件
     $map = [];
     if (!empty($role_name)) {
         $map['role_name'] = ['like', '%' . $role_name . '%'];
     }
     if (!empty($status)) {
         $map['status'] = $status;
     }
     $data = RoleModel::search($map, $sort, $order, $limit, $offset);
     echo json_encode(['total' => $data['count'], 'rows' => $data['data']]);
 }