[英]Doctrine Join and Class Table Inheritance
I'm running into this problem with doctrine and no-one in my surroundings can help me with this. 我在教义上遇到了这个问题,周围的任何人都无法帮助我解决这个问题。 So I was hoping someone here knows it:
所以我希望这里的人知道这一点:
Im working with the following structure: 我正在使用以下结构:
Entity: MLT 实体:MLT
/**
* @Entity
*/
class MLT
{
/**
* @OneToMany(targetEntity="\WAD\Common\LT", cascade={"remove"}, mappedBy="term")
*/
private $languageTerms;
}
Entity: LT 实体:LT
/**
* @Entity
* @InheritanceType("JOINED")
* @DiscriminatorColumn(name="discr", type="string")
* @DiscriminatorMap({"lttext" = "LTText", "ltstring" = "LTString"})
*/
abstract class LT {
/**
* @Id @Column(type="integer")
* @GeneratedValue
*/
private $id;
...
}
Then I have two of the same kind of entities: LTString and LTText: 然后,我有两个相同类型的实体:LTString和LTText:
Entity: LTText 实体:LTText
/**
* @Entity
*/
class LTText extends LT {
/**
* @Column(type="text")
*/
private $value;
}
Entity: LTString 实体:LTString
/**
* @Entity
*/
class LTText extends LT {
/**
* @Column(type="string")
*/
private $value;
}
Now my problem: 现在我的问题是:
I'm creating the following join: 我正在创建以下联接:
$qb = $em->createQueryBuilder();
$qb->select('naam')
->from('\TBIT\Entities\Naam', 'naam') //this is the MLT
->leftjoin('naam.languageTerms','lts') //these are the LT's
->orwhere($qb->expr()->like('lts.value',"'%".$word."%'"));
Now that last line is causing me the troubles. 现在,最后一行给我带来了麻烦。 It gives the error that lts doesn't have a value field.
它给出的错误是lts没有值字段。 This is sort of true since the subclass has it.
这是正确的,因为子类具有它。 But how can I make the query auto include the subclass?
但是,如何使查询自动包含子类?
Have you tried to put the $value
field at LT
class as protected
access: 您是否尝试将
$value
字段放在LT
类中作为protected
访问:
class LTText extends LT {
/**
* @Id @Column(type="integer")
* @GeneratedValue
*/
private $id;
/**
* @Column(type="string")
*/
private $value;
}
So, if you need to set $value
as different data type just rewrite it in the subclass. 因此,如果需要将
$value
设置为其他数据类型,只需在子类中重写它即可。
I found I could work around this problem using a subquery. 我发现我可以使用子查询解决此问题。 Something along the lines of:
类似于以下内容:
$qb->select('naam')
->from('\TBIT\Entities\Naam', 'naam') //this is the MLT
->where(
'naam.languageTerms in (SELECT lts FROM [class] lts'
.' WHERE ' . $qb->expr()->like('lts.value',"'%".$word."%'")
.')'
);
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