## 代码 ``` <?php namespace app\agent\controller; use think\Controller; use think\Db; class RbacController extends Controller { /** * 编辑角色 */ public function roleEdit() { $id = $this->request->param("id", 0, 'intval'); if ($id == 1) { $this->error("超级管理员角色不能被修改！"); } $data = Db::name('role')->where(["id" => $id])->find(); if (!$data) { $this->error("该角色不存在！"); } $this->assign("data", $data); return $this->fetch(); } } ```