Question

我有一些抽象类的实体：EntityDated这意味着该实体包含4个公共字段：created，updated，created_by和updated_by。我想在创建实体时更新4个数据，并在更新实体时更新“updated”和“updated_by”。

我打电话给我的听众：

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而非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。为什么不在这里管理更新的实体？

Answer 1

为了执行插入和更新，我不得不改变两点：

使用onFlush()，而不是preFlush()
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); 

        }                
    }

}

Doctrine2：preFlush getScheduledEntityInsertions（）有效，但不是getScheduledEntityUpdates（）

1 个答案: