如何确定原则实体是否持续存在？ [英] How to determine if a Doctrine entity is persisted?

问题描述

有没有办法确定参数是否已被Doctrine持久化的对象？像一个实体管理器方法，检查一个对象不是一个普通的旧对象，但实际上已经在内存/持久化的东西。

Is there a way to determine if a parameter is an object that is already persisted by Doctrine or not? Something like an entity manager method that checks that an object is not a plain old object but actually something already in memory/persisted.

<?php
public function updateStatus(Entity $entity, EntityStatus $entityStatus)
{
    $entityManager = $this->getEntityManager();
    try {
        // checking persisted entity
        if (!$entityManager->isPersisted($entity)) { 
            throw new InvalidArgumentException('Entity is not persisted');
        }
        // ...
    } catch (InvalidArgumentException $e) {
    }
}

推荐答案

你必须使用这样的UnitOfWork api：

You have to use UnitOfWork api like this:

$isPersisted = \Doctrine\ORM\UnitOfWork::STATE_MANAGED === $entityManager->getUnitOfWork()->getEntityState($entity);

编辑：正如@Andrew Atkinson所说，似乎 EntityManager->包含（$ entity）是现在的首选方式。

As said by @Andrew Atkinson, it seems EntityManager->contains($entity) is the preferred way now.

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