doctrine-orm - 学说 2 : preFlush getScheduledEntityInsertions() works but not getScheduledEntityUpdates()

Question

我有一些具有抽象类的实体:EntityDated 这意味着该实体包含 4 个公共(public)字段:created、updated、创建者 和更新者。我想在创建实体时更新 4 数据，并在更新实体时更新“updated”和“updated_by”。

我做了一个调用我的监听器的服务:

public function preFlush(PreFlushEventArgs $eventArgs)
    {
        $token = $this->container->get('security.context')->getToken();
        $em = $eventArgs->getEntityManager();
        $uow = $em->getUnitOfWork();

        // Inserts
        foreach ($uow->getScheduledEntityInsertions() as $entity) {
            if (is_subclass_of($entity, 'Kiwi\Bundle\TrainingBundle\Entity\EntityDated')) {

                $entity->setCreated(new \Datetime()); 
                $entity->setCreatedBy($token->getUser()->getUsername());
                $entity->setUpdated(new \Datetime()); 
                $entity->setUpdatedBy($token->getUser()->getUsername()); 

            }
        }

        // Updates
        foreach ($uow->getScheduledEntityUpdates() as $entity) {
            if (is_subclass_of($entity, 'Kiwi\Bundle\TrainingBundle\Entity\EntityDated')) {

                $entity->setUpdated(new \Datetime()); 
                $entity->setUpdatedBy($token->getUser()->getUsername()); 

            }
        }
    }

这仅适用于 INSERTS，不适用于 UPDATES(更改已保存，但更新和更新保持不变)。如果我调试 $uow->getScheduledEntityUpdates()，我发现它是空的。为什么不在此处管理更新的实体？

Answer 1

为了同时执行插入和更新，我必须更改两点:

• 使用onFlush()，而不是preFlush()
• 在每次更改后添加 recomputeSingleEntityChangeSet()

新代码:

public function onFlush(OnFlushEventArgs $eventArgs)
{

    $token = $this->container->get('security.context')->getToken();
    $em = $eventArgs->getEntityManager();
    $uow = $em->getUnitOfWork();

    // Inserts
    foreach ($uow->getScheduledEntityInsertions() as $entity) {
        if (is_subclass_of($entity, 'Kiwi\Bundle\TrainingBundle\Entity\EntityDated')) {

            $entity->setCreated(new \Datetime()); 
            $entity->setCreatedBy($token->getUser()->getUsername());
            $entity->setUpdated(new \Datetime()); 
            $entity->setUpdatedBy($token->getUser()->getUsername()); 

            $meta = $em->getClassMetadata(get_class($entity));
            $uow->recomputeSingleEntityChangeSet($meta, $entity);

        }
    }

    // Updates
    foreach ($uow->getScheduledEntityUpdates() as $entity) {
        if (is_subclass_of($entity, 'Kiwi\Bundle\TrainingBundle\Entity\EntityDated')) {

            $entity->setUpdated(new \Datetime()); 
            $entity->setUpdatedBy($token->getUser()->getUsername());

            $meta = $em->getClassMetadata(get_class($entity));
            $uow->recomputeSingleEntityChangeSet($meta, $entity); 

        }                
    }

}