Symfony 2-访问树枝对象映射的对象属性 [英] Symfony 2 - Access mapped Object property form twig

问题描述

我有一个实体，有以下文件：

I hava a entity with the following flied:

/**
 * @ORM\ManyToOne(targetEntity="Document", inversedBy="posts")
 * @ORM\JoinColumn(name="document_id", referencedColumnName="id")
 */
protected $image;

我可以通过以下方法获得：

which I get with the following method:

public function indexAction() {
    $posts = $this->getDoctrine()
            ->getRepository('airpaprcms2Bundle:Post')
            ->findByPageType(1);

    if (!$posts) {
        throw $this->createNotFoundException('No posts in Database!');
    }

    return $this->render('airpaprcms2Bundle:Default:index.html.twig', array('posts' => $posts));
}

如何在细枝中访问映射对象形式的属性？我尝试了 post.image.file （映射的实体文档具有属性文件）

How can I access a property of the mapped object form within twig? I tried post.image.file (the mapped entity Document has a property file)

{% for post in posts %}
<div>
    <h1>
        <a href="{{ path('_view', {'slug': post.slug}) }}">{{ post.title }}</a>
    </h1>
    <p>{{ post.text }}</p>
    <img src="{{ post.image.name }}" alt="{{ post.title }}" />
</div>
{% endfor %}

并得到以下错误消息：

Item "file" for "" does not exist in airpaprcms2Bundle:Default:index.html.twig at line 11

访问映射的文档属性的正确语法是什么？

What is the right syntax to access the mapped document property?

推荐答案

您可以使用以下嫩枝语法访问链接实体的属性：

You can access the property of your linked entity with the following twig syntax:

{% for post in posts %}
{{ post.entityName.propertyName }}
{% endfor %}

在您的情况下，将是：

{% for post in posts %}
{{ post.image.propertyName }}
{% endfor %}

请务必检查所有帖子实体链接到图像对象。如果一个帖子实体没有链接到图像，则在尝试呈现页面时会出现属性未找到错误。

Be sure to check that all post entities are linked to an image object. If one post entity has no link to an image, you will get a property not found error when trying to render your page.

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