php - Symfony 2 一个实体事件监听器在每个实体负载上运行

Question

我是 Symfony 的新手，正在关注 the Jobeet tutorial .我有三个实体——工作、类别和用户。我有以下服务监听器。

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);
        }
    }
}

我原以为 postLoad 只会为 Job 实体调用，但我发现它也会为其他两个实体 Category 调用和用户。我只在 Job 实体中定义了 setContainer。所以，我得到了其他实体的未定义方法。我的解决方法是检查 method_exists。

有什么方法可以只在特定实体上运行 postLoad 吗？

Answer 1

更新的答案

您的示例是一个事件监听器，但根据您的描述，您需要一个 entity listener所以结帐示例如下。

• An Entity Listener could be any class, by default it should be a class with a no-arg constructor.
• Different from Implementing Event Listeners an Entity Listener is invoked just to the specified entity.
• An entity listener method receives two arguments, the entity instance and the lifecycle event.

实体

namespace Your\WhateverBundle\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Entity
 * @ORM\EntityListeners({"Your\WhateverBundle\EntityListener\JobListener"})
 * @ORM\Table(name="job")
 */
class Job
{
   // Your properties, getters and setters
}

实体监听器

namespace Your\WhateverBundle\EntityListener;

use Your\WhateverBundle\Entity\Job;
use Doctrine\ORM\Event\LifecycleEventArgs;
use Doctrine\ORM\Mapping as ORM;

class JobListener
{
    /** @ORM\PostLoad */
    public function postLoadHandler(Job $job, LifecycleEventArgs $args)
    {
        // Do whatever you want
    }
}