php - Symfony onFlush Doctrine 监听器

嗨，我有一个 onFlush 监听器:

<?php

namespace FM\AppBundle\EventListener;

use FM\AdminBundle\Entity\Address\DeliveryAddress;
use Doctrine\ORM\Event\OnFlushEventArgs;

class DeliveryAddressListener
{
    /**
     * @param OnFlushEventArgs $args
     */
    public function onFlush(OnFlushEventArgs $args)
    {
        $em = $args->getEntityManager();
        $uow = $em->getUnitOfWork();

        foreach ($uow->getScheduledEntityUpdates() as $entity) {
            if ($entity instanceof DeliveryAddress) {
                $this->addPostalToUser($entity, $args);
            }
        }
    }

    /**
     * @param DeliveryAddress  $deliveryAddress
     * @param OnFlushEventArgs $args
     */
    public function addPostalToUser(DeliveryAddress $deliveryAddress, OnFlushEventArgs $args)
    {
        $em = $args->getEntityManager();
        $user = $deliveryAddress->getOwner();

        $user->setPostalCode($deliveryAddress->getZipCode());
    }
}

服务.yml:

delivery_address.listener:
    class: FM\AppBundle\EventListener\DeliveryAddressListener
    tags:
        - { name: doctrine.event_listener, event: onFlush }

我正在尝试将新的 zipCode 设置为用户。但它似乎不起作用。

即使我添加了 $em->persist($user) 。

我正在看这个文档:http://docs.doctrine-project.org/projects/doctrine-orm/en/latest/reference/events.html#onflush

但我不明白如何使用这种解释使它起作用:
If you create and persist a new entity in onFlush, then calling EntityManager#persist() is not enough. You have to execute an additional call to $unitOfWork->computeChangeSet($classMetadata, $entity).

最佳答案

操作字段时，应在 preUpdaet/prePersist 中完成。

AppBundle/EventSubscriber/EntitySubscriber.php

namespace AppBundle\EventSubscriber;

use Doctrine\Common\EventSubscriber;
use Doctrine\ORM\Event\LifecycleEventArgs;
use Doctrine\ORM\Event\OnFlushEventArgs;

class EntitySubscriber implements EventSubscriber
{
    private $now;

    public function __construct()
    {
        $this->now = \DateTime::createFromFormat('Y-m-d h:i:s', date('Y-m-d h:i:s'));
    }

    public function getSubscribedEvents()
    {
        return [
            'prePersist',
            'preUpdate'
        ];
    }

    public function prePersist(LifecycleEventArgs $args)
    {
        $entity        = $args->getEntity();
        $entityManager = $args->getEntityManager();

        if (method_exists($entity, 'setCreatedAt')) {
            $entity->setUpdatedAt($this->now);
        }

        if (method_exists($entity, 'setUpdatedAt')) {
            $entity->setUpdatedAt($this->now);
        }
    }

    public function preUpdate(LifecycleEventArgs $args)
    {
        $entity        = $args->getEntity();
        $entityManager = $args->getEntityManager();

        if (method_exists($entity, 'setUpdatedAt')) {
            $entity->setUpdatedAt($this->now);
        }
    }
}

services.yml

    app.entity_subscriber:
        class: AppBundle\EventSubscriber\EntitySubscriber
        tags:
            - { name: doctrine.event_subscriber, connection: default }

关于php - Symfony onFlush Doctrine 监听器，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/37831828/