symfony2 原则坚持后如何更新 OneToMany 实体？

Question

我得到了两个实体。 这是第一个有 OneToMany 关系的：

class MarketMain
{
    /**
     * @var integer
     *
     * @ORM\Column(name="id", type="bigint", nullable=false)
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="IDENTITY")
     */
    private $id;

    /**
     * @var \Doctrine\Common\Collections\Collection
     *
     * @ORM\OneToMany(targetEntity="\Acme\CMSBundle\Entity\MarketLanguage", mappedBy="marketMain", indexBy="langId", cascade="all", orphanRemoval=true, fetch="EXTRA_LAZY")
     */
    private $marketLanguage;
}

这是第二个有反转多对一关系的：

class MarketLanguage
{
    /**
     * @var integer
     *
     * @ORM\Column(name="market_id", type="integer", nullable=false)
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="NONE")
     */
    private $marketId = 0;

    /**
     * @var integer
     *
     * @ORM\Id
     * @ORM\Column(name="lang_id", type="integer", nullable=false)
     */
    private $langId = 1;

    /**
     * @var string
     *
     * @ORM\Column(name="name", type="string", length=200, nullable=true)
     */
    private $name;

    /**
     * @var \Acme\CMSBundle\Entity\MarketMain
     *
     * @ORM\ManyToOne(targetEntity="\Acme\CMSBundle\Entity\MarketMain", inversedBy="marketLanguage")
     * @ORM\JoinColumn(name="market_id", referencedColumnName="id")
     */
    private $marketMain;
}

我想像这样保存实体：

$em = $this->getDoctrine()->getManager();

$marketMain = new MarketMain();
$marketLanguage = new ArrayCollection();
$marketLanguage->set(1,new MarketLanguage());
$marketLanguage->set(2,new MarketLanguage());
$marketLanguage->set(3,new MarketLanguage());
$marketMain->setMarketLanguage($marketLanguage);

foreach ($marketMain->getMarketLanguage() as $market_language)
{
$market_language->setMarketMain($marketMain);
}
$em->persist($marketMain);
$em->flush();

foreach ($marketMain->getMarketLanguage() as $market_language)
{
   $market_language->setName("Default name for MarketMain entity id:".$marketMain->getId());
}
$em->flush();

但在第二次刷新后，我的 MarketLanguage 实体没有更新，在学说查询日志中，我看到 MarketLanguage 实体在与 MarketMain 保持后没有关系。请不要说我必须在持久化之前设置 MarketLanguage 名称，因为我必须将刷新的 ID 添加到该名称。

这是在第二次刷新中执行更新的查询（来自学说日志）：

"START TRANSACTION" [] []
UPDATE market_language SET name = ? WHERE market_id = ? AND lang_id = ? ["Default name for MarketMain entity 15",0,"1"] []
"COMMIT" [] []

Answer 1

看起来问题是由于 MarketLanguage ID 已修复，因为：

private $marketId = 0;

请在没有= 0的情况下重试

编辑：由于您使用“无”ID 生成策略，您必须手动为您的 MarketLanguage 实体分配 ID。见doc

Answer 2

$marketMain = new MarketMain();您正在创建新实例，所以

$marketMain->getMarketLanguage() 

将返回空数组，也许您应该从数据库中查询所有 MarketLanguages 然后将它们分配给 MarketMain ？

$langs = $em->getRepositiory('Bundle:MarketLanguage')->findAll()
foreach ($langs as $market_language)
  {
     $market_language->setMarketMain($marketMain);
  }
$em->persist($marketMain);
$em->flush();

编辑：

所以试试这个：

$ml1 = new MarketLanguage();
$ml2 = new MarketLanguage();
$ml3 = new MarketLanguage();
$marketLanguage->set(1,$ml1);
$marketLanguage->set(2,$ml2);
$marketLanguage->set(3,$ml3);
$marketMain->setMarketLanguage($marketLanguage);

foreach ($marketMain->getMarketLanguage() as $market_language)
{
$market_language->setMarketMain($marketMain);
}
$em->persist($marketMain);

$em->persist($ml1);
$em->persist($ml2);
$em->persist($ml3);
$em->flush();