public function add()
 {
     if (isset($_POST['name'])) {
         $data['pid'] = request('pid');
         $data['name'] = request('name');
         $data['url'] = request('url');
         $data['memo'] = request('memo');
         if ($this->userInfo['group']['permission']['type'] != 'super' && !$data['pid']) {
             $this->error('请选择上级单位');
         }
         if (DepartmentModel::add($data)) {
             $this->success('/admin/department');
         } else {
             $this->error();
         }
     } else {
         $this->display('department_edit');
     }
 }