如何确保加载 Synfony 实体以触发 postLoad 事件？

Question

我是 Symfony 的新手，正在关注 the Jobeet tutorial. I'm trying to inject Container into Entity using service listener and postLoad. The purpose is to use LiipImagineBundle 在 @ORM\PostPersist 中编写缩略图。问题是 Job 实体没有加载到某些路由上，然后 postLoad 没有被触发。因此，@ORM\PostPersist 中使用的容器不可用。

根据教程，有两条路线 PostPersist 运行:

job/create
job/update

我发现 Job 实体没有加载并且 postLoad 没有在 job/create 上触发。路由 job/update 没问题，注入了容器。我发布了

的一些代码片段

services.yml
JobListener.php
Entity\Job.php
JobController.php

src/Ibw/JobeetBundle/Resources/config/services.yml

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

src/Ibw/JobeetBundle/Doctrine/Event/Listener/JobListener.php

<?php
namespace Ibw\JobeetBundle\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;
    }

    /**
     * @ORM\PostLoad
     */
    public function postLoad(LifecycleEventArgs $eventArgs)
    {
        $entity = $eventArgs->getEntity();
        if (method_exists($entity, 'setContainer')) {
            $entity->setContainer($this->container);
        }
    }
}

src/Ibw/JobeetBundle/Entity/Job.php

// ....
/**
 * @ORM\PostPersist
 */
public function upload()
{
    if (null === $this->getFile()) {
        return;
    }

    if ($this->getFile()->move($this->getUploadTmpRootDir(), $this->logo)) {
        $this->moveAndResizeImage();
    }

    $this->file = null;
}

private function moveAndResizeImage($filter = 'primary')
{
    $path = $this->getWebTmpPath();
    $target = $this->getAbsolutePath();

    if (file_exists($path)) {
        $container = $this->container; 
        // got problem here. $container is null for /job/create
        // but it is okay for /job/update
        $dataManager = $container->get('liip_imagine.data.manager');
        $filterManager = $container->get('liip_imagine.filter.manager');

        $image = $dataManager->find($filter, $path); 
        $thumb = $filterManager->applyFilter($image, $filter);

        file_put_contents($target, $thumb->getContent());

        unlink($path); // remove the temp client original image
    }
}
// ...

src/Ibw/JobeetBundle/Controller/JobController.php

// ...
public function createAction(Request $request)
{
    $entity = new Job();
    $form = $this->createCreateForm($entity);
    $form->handleRequest($request);

    if ($form->isValid()) {
        $em = $this->getDoctrine()->getManager();
        $em->persist($entity);
        $em->flush();

        return $this->redirect($this->generateUrl('ibw_job_preview', array(
            'company' => $entity->getCompanySlug(),
            'location' => $entity->getLocationSlug(),
            'token' => $entity->getToken(),
            'position' => $entity->getPositionSlug()
        )));
    }

    return $this->render('IbwJobeetBundle:Job:new.html.twig', array(
        'entity' => $entity,
        'form'   => $form->createView(),
    ));
}
// ....

有什么办法可以解决这个问题吗？

Answer 1

我通过在事件侦听器 class 中添加 prePersist 来解决这个问题，以确保容器在持久化之前可用。 LiipImagineBundle 服务在 postPersist 上调用。我将 JobListener 重命名为 MyListener。这是我的工作代码：

src/Ibw/JobeetBundle/Resources/config/services.yml

ibw.jobeet.event.mylistener:
    class: Ibw\JobeetBundle\Listener\Event\MyListener
    calls:
        - [setContainer, ["@service_container"]]
    tags:
        - { name: doctrine.event_listener, event: postLoad }
        - { name: doctrine.event_listener, event: prePersist }

src/Ibw/JobeetBundle/Listener/Event/MyListener.php

<?php
namespace Ibw\JobeetBundle\Listener\Event;

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

use Ibw\JobeetBundle\Entity\Job;

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

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

    /**
     * @param LifecycleEventArgs $eventArgs
     */
    public function postLoad(LifecycleEventArgs $eventArgs)
    {
        $this->injectContainer($eventArgs);
    }

    /**
     * @param LifecycleEventArgs $eventArgs
     */
    public function prePersist(LifecycleEventArgs $eventArgs)
    {
        $this->injectContainer($eventArgs);
    }

    protected function injectContainer(LifecycleEventArgs $eventArgs)
    {
        $entity = $eventArgs->getEntity();
        if ($entity instanceof Job) {
            $entity->setContainer($this->container);
        }

        $em = $eventArgs->getEntityManager();
        $repository = $em->getRepository('IbwJobeetBundle:Job');
        if ($entity instanceof Job) {
            $repository->setContainer($this->container);
        }
    }
}

可能有更好的方法来处理这个问题。如果有，请 post 回答。我知道注入整个容器是一种不好的做法。我稍后会更新以注入所需的服务。

如何确保加载 Synfony 实体以触发 postLoad 事件？

How to make sure Synfony Entity is loaded to trigger postLoad event?

php

symfony

symfony-2.6