流向双向一对一关系 [英] Bidirectional One-To-One Relationships in Flow
问题描述
在流量中是否有一对一关系,而不必设置属性两次?
Is it possible to have One-To-One Relationships in Flow without having to set the attributes twice?
我有两张以一对一关系连接的表格,但只有其中一个表格应包含此关系的额外列。
I have two tables that are connected in a One-To-One Relationship, but only one of them should contain an extra column for this Relation.
明确的原则支持这种行为:
http://doctrine-orm.readthedocs.org/en/latest/reference/association-mapping.html#one-to-one-bidirectional
Doctrine clearly supports this behavior: http://doctrine-orm.readthedocs.org/en/latest/reference/association-mapping.html#one-to-one-bidirectional
应该带有一个componenttape列的类:
The class that should come with a componenttape column:
/**
* @Flow\Entity
*/
class Component{
/**
* @var \Some\Package\Domain\Model\Component\Tape
* @ORM\OneToOne(cascade={"all"}, inversedBy="component")
*/
protected $componentTape;
…
}
应该只能找到连接的类没有额外的列:
The class that should just be able to find the connection without an extra column:
/**
* @Flow\Entity
*/
class Tape{
/**
* @var \ Some\Package\Domain\Model\Component
* @ORM\OneToOne(mappedBy="componentTape")
*/
protected $component;
}
一个学说更新将为这两个模型创建额外的列。
A doctrine update will create extra columns for both models.
这是我现在的工作环境如下所示:
This is what my workarround at the moment looks like:
class Component{
..
/**
* @param \Some\Package\Domain\Model\Component\Tape $componentTape
* @return void
*/
public function setComponentTape($componentTape) {
$this->componentTape = $componentTape;
$this->componentTape->setComponent($this);
}
推荐答案
解决方法无论如何也是必要的在请求期间始终保持关系正确。
但是第二个DB列不应该是必需的。你检查了教义是否真的填补了?也许/可能只是创建的迁移是错误的,磁带
中的组件
列可以省略。
The workaround will be necessary anyway to keep the relation correct at all times during a request.
But the second DB column shouldn't be necessary. Did you check if doctrine actually fills it? Maybe/Probably just the created migration is wrong and the component
column in Tape
can be omitted.
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