如何让 Doctrine 级联持续工作？

Question

我正在使用 Doctrine v2.4.2 开发 ZF2/Apigility 应用程序。

模型结构如下：anAssethasanAttachment（所以，这是1:1关系）：

问题是我无法使用嵌入的Attachment 持久化Asset 并得到错误

23000, 1048, 列 'attachment_linkassetuuid' 不能为空

看来Doctrine先尝试保存Attachment，找不到attachment_linkassetuuid列的值，设置为null，外键约束坏了。

如何正确定义实体并使级联持续工作？

---

Asset

namespace MyDoctrineDataAccess\Model\Entity;
...
/**
 * Asset
 *
 * @ORM\Table(name="tbl_asset")
 * @ORM\Entity
 */
class Asset
{
    /**
     * @var string @ORM\Column(name="asset_uuid", type="string", length=36, nullable=false)
     * @ORM\Id
     */
    private $uuid;

    /**
     * @var \MyDoctrineDataAccess\Model\Entity\Attachment
     * @ORM\OneToOne(targetEntity="MyDoctrineDataAccess\Model\Entity\Attachment", mappedBy="asset", cascade={"remove", "persist"}, orphanRemoval=true)
     */
    private $attachment;
    ...
}

/**
 * @param \MyDoctrineDataAccess\Model\Entity\Attachment $attachment
 */
public function setAttachment($attachment) {
    $this->attachment = $attachment;
    return $this;
}

/**
 * @return the $attachment
 */
public function getAttachment() {
    return $this->attachment;
}

Attachment

namespace MyDoctrineDataAccess\Model\Entity;
...
/**
 * Attachment
 *
 * @ORM\Table(name="tbl_attachment", indexes={@ORM\Index(name="fk_attachment_uuid", columns={"attachment_linkassetuuid"})})
 * @ORM\Entity
 */
class Attachment
{
    /**
     *
     * @var string @ORM\Column(name="attachment_uuid", type="string", length=36, nullable=false)
     *      @ORM\Id
     */
    private $uuid;

    /**
     *
     * @var \MyDoctrineDataAccess\Model\Entity\Asset
     * @ORM\OneToOne(targetEntity="\MyDoctrineDataAccess\Model\Entity\Asset", inversedBy="attachment", cascade={"persist"})
     * @ORM\JoinColumn(name="attachment_linkassetuuid", referencedColumnName="asset_uuid")
     */
    private $asset;
    ...
}

/**
 *
 * @param \MyDoctrineDataAccess\Model\Entity\Asset $asset
 */
public function setAsset($asset)
{
    $this->asset = $asset;
    return $this;
}

/**
 *
 * @return the $asset
 * 
 */
public function getAsset()
{
    return $this->asset;
}

AssetService

namespace MyApi\V1\Rest\Asset;
...
class AssetService implements ServiceManagerAwareInterface
{
    ...
    public function saveAssets($data)
    {
        $entityManager = $this->serviceManager->get('Doctrine\ORM\EntityManager');
        $assetRepository = $entityManager->getRepository('My\Model\Entity\Asset');
        $hydratorManager = $this->serviceManager->get('hydratormanager');
        $hydrator = $hydratorManager->get('My\\Model\\Entity\\Hydrator\\EntityHydrator');
        foreach ($data as $assetData) {
            $asset = new Asset();
            $hydrator->hydrate($assetData, $asset);
            $entityManager->persist($asset);
            $entityManager->flush();
        }
    }
    ...
}

Answer 1

由于@JoinColumn 默认nullable 为true according to the Doctrine documentation 我不太明白这个错误。但我确实看到在您的Attachment 实体@table 定义中您声明了一个索引：

indexes={@ORM\Index(name="fk_attachment_uuid", columns={"attachment_linkassetuuid"})}

尝试一次删除它，重建您的数据库并检查它是否解决了您的问题。如果没有，请发表评论，我会再看一看。

检查the OneToOne example in the Doctrine documentation。那里没有提到像你一样添加@index。 Doctrine 会自动将必要的索引添加到您的关系列中。

更新：

我认为问题可能在于Asset 不是关系的拥有方。检查文档here。尝试像这样更改您的 setAttachment 方法：

public function setAttachment($attachment) 
{
    $this->attachment = $attachment;
    $attachment->setAsset($this);
    return $this;
}