Symfony2和Doctrine:代理类不会延迟加载实体字段。

I have three relevant entities in my application with a oneToMany reation: one "Aufwand" belongs to one "Aufgabe", wich belongs to one "Version". At some point in the controller, I write:

在我的申请中，我有三个相关的实体:一个“Aufwand”属于一个“Aufgabe”，它属于一个“版本”。在控制器的某个时刻，我写道:

$Aufwand['version'] = $Aufwand->getAufgabe()->getVersion();

and pass that to the Twig template with:

并将其传递给Twig模板:

return $this->render('XXX:Aufwand:index.html.twig', array('Aufwand' => $Aufwand));

"Version" has a String attribute "nummer" wich I try to access in my Template using

“版本”有一个字符串属性“nummer”，我尝试在我的模板中使用。

{{ Aufwand.version.nummer }}

but it prints nothing, same for all other attributes of "Version" - but I checked and Aufwand.version alone is really an XXXXVersionProxy - Object, as it should be. So appearantly the "Lazy-Loading" from Doctrine does not really happen.

但它没有打印任何东西，这与“版本”的所有其他属性相同——但我检查了一下，并使用了Aufwand。单独的版本实际上是一个XXXXVersionProxy -对象，它应该是这样的。因此，从教义上看来，“延迟加载”并不真的发生。

This is the Mapping information in "Version.orm.yml":

这是“版本.orm.yml”中的映射信息:

XXX\Entity\Version:
    type: entity
    repositoryClass: XXX\Repository\VersionRepository
    table: version

    id: 
        Projekt:
            associationKey: true
        nummer:
            type: string
            length: 20

    fields:
        beschreibung:
            type: text
            nullable: true
        faktor: 
            type: decimal
            precision: 2
            scale: 1

    uniqueConstraints:
        version_nr_unique:
           columns: nummer

    oneToMany:
        Aufgaben:
            targetEntity: Aufgabe
            mappedBy: Version

    manyToOne:
        Projekt:
            targetEntity: Projekt
            inversedBy: Versionen
            joinColumn:
                name: projekt_nummer
                referencedColumnName: nummer

and in "Aufgabe.orm.yml":

在“Aufgabe.orm.yml”:

XXX\Entity\Aufgabe:
    type: entity
    repositoryClass: XXX\Repository\AufgabeRepository
    table: aufgabe

    id: 
        id:
            type: integer
            generator:
                strategy: AUTO

    fields:
        name:
            type: string
            length: 40
        beschreibung:
            type: text
            nullable: true
        faktor: 
            type: decimal
            precision: 2
            scale: 1
        soll_aufwand:
            type: integer

    oneToMany:
        Aufwaende:
            targetEntity: Aufwand
            mappedBy: Aufgabe

    manyToOne:

        Kategorie:
            targetEntity: Kategorie
            inversedBy: Aufgaben
            joinColumn:
                name: kategorie_id
                nullable: false
                referencedColumnName: id

        Projekt:
            targetEntity: Projekt
            inversedBy: Aufgaben
            joinColumn:
                name: projekt_nummer
                referencedColumnName: nummer
                nullable: true

        Version:
            targetEntity: Version
            inversedBy: Aufgaben
            joinColumn:
                name: version_nummer
                nullable: true
                referencedColumnName: nummer

The getters and setters in "Version" and "Aufgabe" are standard "get{Attribute}()", the attributes themselves are private. I have already tried clearing the metadata-cache and dumping $Aufwand->getAufgabe()->getVersion() // also plus ->getNummer() in the controller, everything seems to be right there. And in the Database Table the "Aufwand" has an "Aufgabe" wich has a "Version" wich should give me its "nummer" ...

“版本”和“Aufgabe”中的getter和setter是标准的“get{Attribute}()”，属性本身是私有的。我已经尝试过清除metadata-cache并转储$Aufwand->getAufgabe()->getVersion() //也添加->getNummer()在控制器中，一切似乎都在那里。在数据库表中，“Aufgabe”有一个“Aufgabe”，它有一个“版本”，它应该给我它的“nummer”……

I'm using PHP Symfony 2.0.16 with Doctrine 2 on a PostgreSQL Database, any hint where to look for an error would be much appreciated. I guess it could be in the Twig template but I have no idea what is wrong.

我在PostgreSQL数据库上使用了PHP Symfony 2.0.16和Doctrine 2，任何寻找错误的提示都将非常感谢。我想可能是在Twig模板中，但我不知道什么地方不对。

1 个解决方案

#1

why not just pass $Aufwand to the template and do:

为什么不直接向模板传递$Aufwand，然后做:

{{Aufwand.aufgabe.version.number}}

That should work from the view.

这应该从视图中起作用。

#1