无法在 Symfony 4 服务上注入模板

Question

我有以下 class:

电子邮件通知

namespace App\Component\Notification\RealTimeNotification;

use Symfony\Bridge\Twig\TwigEngine;
use Symfony\Bundle\FrameworkBundle\Templating\EngineInterface;

use App\Component\Notification\NotificationInterface;

class EmailNotification implements NotificationInterface
{   
    private $logNotification;

    public function __construct(LogNotification $logNotification, \Swift_Mailer $mailer,  EngineInterface $twigEngine)
    {
        $this->logNotification = $logNotification;
    }

    public function send(array $options): void
    {
        $this->logNotification->send($options);

        dump('Sent to email');
    }
}

我的 yml 中有以下服务定义：

app.email_notification:
    class: App\Component\Notification\RealTimeNotification\EmailNotification
    decorates: app.log_notification
    decoration_inner_name: app.log_notification.inner
    arguments: ['@app.log_notification.inner', '@mailer', '@templating']

但是，当我尝试运行我的应用程序时，它抛出一个异常说：

Cannot autowire service "App\Component\Notification\RealTimeNotification\EmailNotification": argument "$twigEngine" of method "__construct()" has type "Symfony\Bundle\FrameworkBundle\Templating\EngineInterface" but this class was not found.

为什么会这样？

谢谢！

Answer 1

很可能您的项目中没有包含模板，在 Symfony 4 中您必须明确要求它：

composer require symfony/templating

Answer 2

你必须安装symfony/templating

composer require symfony/templating

稍微改一下config/packages/framework.yaml

framework:
    templating:
        engines:
            - twig

Answer 3

我设法用 Twig 环境和 HTTP 响应做到了

<?php

namespace App\Controller;

use Twig\Environment;
use Symfony\Component\HttpFoundation\Response;

class MyClass
{
    private $twig;

    public function __construct(Environment $twig)
    {
        $this->twig = $twig;
    }

    public function renderTemplateAction($msg)
    {
        return new Response($this->twig->render('myTemplate.html.twig'));
    }
}

无法在 Symfony 4 服务上注入模板

Cannot inject Templating on Symfony 4 Service

symfony

symfony4