Yii2 RBAC权限自己的岗位

我想为创建帖子/类别的作者提供更新/删除帖子/类别的权限

我不知道，我必须在这里给出第二个参数。I tried:

$post=new Post();
       if (Yii::$app->user->can('updatePost',['Post'=>$post])) 

但是得到错误获取未知属性:common'models'Post::createdBy

My Class AuthorRule:

class AuthorRule extends Rule
{
public $name = 'isAuthor';
/**
 * @param string|integer $user the user ID.
 * @param Item $item the role or permission that this rule is associated with
 * @param array $params parameters passed to ManagerInterface::checkAccess().
 * @return boolean a value indicating whether the rule permits the role or permission it is associated with.
 */
public function execute($user, $item, $params)
{
    return isset($params['Post']) ? $params['Post']->CreatedBy->id == $user : false;
}
}

• Post模型
<
• RBAC控制器/gh>
• AuthorRule
<
• AuthItem表/gh><
• AuthItemChild表/gh>
• 身份验证任务