原则 2：通过值对象重新附加实体

发布于 2024-12-24 17:19:38 字数 862 浏览 0 评论 0原文

我正在使用 Doctrine 2，并且有一个 Address 值对象：

class Address
{
    /** @var string */
    protected $street;

    /** @var string */
    protected $city;

    /** @var Application\Domain\Model\Country */
    protected $country;
}

我需要将此 Address 存储在 PHP 会话中（序列化），并稍后检索它。然后，当我检索此值对象时，我希望将 Country 对象合并到当前的实体管理器，以便该国家/地区与当前工作单元同步。

是否可以将此值对象“合并”到当前实体管理器，就像我使用 cascade="merge" 对常规实体所做的那样，以获取 Country 实例替换为当前的？

显然，我可以手动创建另一个带有手动合并的 Country 的 Address：

$address = $_SESSION['address'];
$country = $em->merge($address->getCountry());
$address = new Address($address->getStreet(), $address->getCity(), $country);

但我想知道 Doctrine 中是否缺少一个允许我直接合并 VO 的功能反而？

原文

I'm working with Doctrine 2, and have an Address value object:

class Address
{
    /** @var string */
    protected $street;

    /** @var string */
    protected $city;

    /** @var Application\Domain\Model\Country */
    protected $country;
}

I need to store this Address in a PHP session (serialized), and retrieve it later on. When I then retrieve this value object, I want to have the Country object merged to the current Entity Manager, so that this Country is in sync with the current unit of work.

Is it possible to "merge" this value object to the current Entity Manager, as I would do on a regular entity with cascade="merge", to get the Country instance replaced with the current one?

I can obviously manually create another Address with a manually merged Country:

$address = $_SESSION['address'];
$country = $em->merge($address->getCountry());
$address = new Address($address->getStreet(), $address->getCity(), $country);

But I'm wondering if I'm missing a feature in Doctrine that would allow me to directly merge the VO instead?

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