php - 如何从Entity中postLoad的LifecycleEventArgs获取Container对象？

Question

我正在尝试将 Container 对象（在控制器中可用）注入到使用postLoad lifecycleCallbacks. 该postLoad方法的参数是LifecycleEventArgs。EventManager根据转储输出，我可以在中看到容器属性（我想检索）LifecycleEventArgs，但它似乎是私有属性，并且getContainer()在EventManager. 以下是我的代码。

服务.yml

services:
    ibw.jobeet.entity.job.container_aware:
        class: Ibw\JobeetBundle\Entity\Job
        tags:
            - { name: doctrine.event_listener, event: postLoad }

Ibw\JobeetBundle\Entity\Job.php

<?php
namespace Ibw\JobeetBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Doctrine\ORM\Event\LifecycleEventArgs;
use Symfony\Component\Validator\Constraints as Assert;
use Symfony\Component\HttpFoundation\File\UploadedFile;
use Symfony\Component\DependencyInjection\ContainerAware;
use Symfony\Component\DependencyInjection\ContainerInterface;

use Ibw\JobeetBundle\Utils\Jobeet;

/**
 * Job
 */
class Job
{
    //....
    /**
     * @var Container
     */
    protected $container;

    public function postLoad(LifecycleEventArgs $eventArgs)
    {
        $entity = $eventArgs->getEntity();
        $entityManager = $eventArgs->getEntityManager();
        $eventManager = $entityManager->getEventManager();
        echo '<pre>';
        \Doctrine\Common\Util\Debug::dump($eventManager, 3);

        // want to get $eventManager->container here

        exit;
    }
    //....
}

有没有其他方法可以找回？

Answer 1

您可以使用 setter-injection 在创建侦听器服务时调用预定义方法（setContainer()在本例中），并将容器作为参数：

services:
    ibw.jobeet.entity.job.container_aware:
        class: Your\Bundle\Doctrine\Event\Listener\JobListener
        calls:
            - [setContainer, ["@service_container"]]
        tags:
            - { name: doctrine.event_listener, event: postLoad }

现在容器被注入到监听器类的构造函数中：

namespace Your\Bundle\Doctrine\Event\Listener;

use Symfony\Component\DependencyInjection\ContainerInterface;
use Doctrine\ORM\Event\LifecycleEventArgs;

class JobListener
{
     /** @var ContainerInterface */
     protected $container;

     /** 
      * @param ContainerInterface @container
      */
     public function setContainer(ContainerInterface $container)
     {
          $this->container = $container;
     }

     public function postLoad(LifecycleEventArgs $eventArgs)
     {
         $entity = $eventArgs->getEntity();
         // do something with your entity here i.e.
         $entity->setFoo($this->container->getParameter('foo'));

这只是一个例子。请考虑只注入您真正需要的服务——而不是注入容器本身。您将获得更好的可测试性和性能奖励。