如何在yii 2中为IntegrityException设置错误页

<?php

namespace app\components;

use yii\base\ErrorException;
use yii\base\Exception;
use yii\base\UserException;
use yii\db\IntegrityException;
use yii\web\HttpException;
use yii\web\Response;

class IntegrityExceptionHandler
{
    public function handleException($exception)
    {
        if ($exception instanceof IntegrityException) {
            // 处理IntegrityException错误
            // 可以在这里进行自定义的错误处理逻辑
            // 例如，可以渲染一个自定义的错误页
            return \Yii::$app->getView()->render('@app/views/error/integrity', [
                'exception' => $exception,
            ]);
        }
    }
}

return [
    // ...
    'components' => [
        // ...
        'errorHandler' => [
            'errorAction' => 'site/error',
            'class' => 'app\components\IntegrityExceptionHandler',
        ],
        // ...
    ],
    // ...
];

<?php

use yii\helpers\Html;

/* @var $this yii\web\View */
/* @var $exception yii\db\IntegrityException */

$this->title = 'Integrity Exception';
?>

<div class="site-error">
    <h1><?= Html::encode($this->title) ?></h1>

    <div class="alert alert-danger">
        <?= Html::encode($exception->getMessage()) ?>
    </div>

    <p>
        The above error occurred while the Web server was processing your request.
    </p>
    <p>
        Please contact us if you think this is a server error. Thank you.
    </p>
</div>