Laravel抛出ErrorException

Question

当我从网站网址中删除一些宪章时，它会显示“ ErrorException试图获取非对象的属性”

我需要重定向到404页面。我在handler.php中编写以下代码

public function render($request, Exception $exception){
        if($this->isHttpException($exception)){
            switch ($exception->getStatusCode()){
                // not found
                case 404:
                return redirect()->guest('/');
                break;

                // internal error
                case '500':
                return redirect()->guest('/');
                break;

                default:
                    return $this->renderHttpException($exception);
                break;
            }
        }else{
                return parent::render($request, $exception);
        }        
    }