Sonata项目：无法访问引用SonataPage的媒体

Question

我有一个Page实体，它与Sonata MediaBundle的Media实体有多对一的关联

<?xml version="1.0" encoding="utf-8"?>
<doctrine-mapping xmlns="http://doctrine-project.org/schemas/orm/doctrine-mapping" xsi="http://www.w3.org/2001/XMLSchema-instance" schemaLocation="http://doctrine-project.org/schemas/orm/doctrine-mapping http://doctrine-project.org/schemas/orm/doctrine-mapping.xsd">
    <entity
        name="Application\Sonata\PageBundle\Entity\Page"
        table="page__page"
        >

        <id name="id" type="integer" column="id">
            <generator strategy="AUTO"/>
        </id>
        <field name="shortContent" type="text" column="short_content" nullable="true" />

        <many-to-one field="media" target-entity="Application\Sonata\MediaBundle\Entity\Media">
            <join-column name="media_id" />
        </many-to-one>

        <lifecycle-callbacks>
            <lifecycle-callback type="postPersist" method="postPersist"/>
        </lifecycle-callbacks>
    </entity>
</doctrine-mapping>

当我以管理员身份登录时 - 一切正常，我可以使用{{ page.getMedia() }}访问twig中的媒体

但是，如果我在隐身窗口中打开此页面，该页面的媒体将是null任何人有任何想法？

Answer 1

我找到了这种情况的解决方案。

如果我们没有以管理员身份登录，我们会看到某个页面的快照，当我们向Page实体添加新字段时，快照创建者对此字段一无所知，因此我们需要扩展Sonata \ PageBundle \ Model \ Transformer模型

Page.orm.xml

<?xml version="1.0" encoding="utf-8"?>
<doctrine-mapping xmlns="http://doctrine-project.org/schemas/orm/doctrine-mapping" xsi="http://www.w3.org/2001/XMLSchema-instance" schemaLocation="http://doctrine-project.org/schemas/orm/doctrine-mapping http://doctrine-project.org/schemas/orm/doctrine-mapping.xsd">
    <entity
        name="Application\Sonata\PageBundle\Entity\Page"
        table="page__page"
        >

        <id name="id" type="integer" column="id">
            <generator strategy="AUTO"/>
        </id>
        <field name="shortContent" type="text" column="short_content" nullable="true" />

        <many-to-one field="media" target-entity="Application\Sonata\MediaBundle\Entity\Media">
            <join-column name="media_id" />
        </many-to-one>

        <lifecycle-callbacks>
            <lifecycle-callback type="postPersist" method="postPersist"/>
        </lifecycle-callbacks>
    </entity>
</doctrine-mapping>

Snapshot.orm.xml

<?xml version="1.0" encoding="utf-8"?>
<doctrine-mapping xmlns="http://doctrine-project.org/schemas/orm/doctrine-mapping"
                  xmlns:gedmo="http://gediminasm.org/schemas/orm/doctrine-extensions-mapping"
                  xsi="http://www.w3.org/2001/XMLSchema-instance"
                  schemaLocation="http://doctrine-project.org/schemas/orm/doctrine-mapping http://doctrine-project.org/schemas/orm/doctrine-mapping.xsd">
    <entity
        name="Application\Sonata\PageBundle\Entity\Snapshot"
        table="page__snapshot"
        >

        <id name="id" type="integer" column="id">
            <generator strategy="AUTO"/>
        </id>
        <many-to-one field="media" target-entity="Application\Sonata\MediaBundle\Entity\Media">
            <join-column name="media_id" />
        </many-to-one>
        <gedmo:loggable log-entry-class="Gedmo\Loggable\Entity\LogEntry"/>
    </entity>
</doctrine-mapping>

并且页面到快照变换器类

PageTransformer.php

<?php

namespace Application\Sonata\PageBundle\Entity;


use Sonata\PageBundle\Entity\Transformer;
use Sonata\PageBundle\Model\PageInterface;
use Sonata\PageBundle\Model\SnapshotInterface;

class PageTransformer extends Transformer
{

    public function create(PageInterface $page)
    {
        /** @var Snapshot $snapshot */
        $snapshot = parent::create($page);

        $content = $snapshot->getContent();

        $snapshot->setContent($content);
        $snapshot->setMedia($page->getMedia());

        return $snapshot;

    }

    public function load(SnapshotInterface $snapshot)
    {
        $page = parent::load($snapshot);

        $page->setMedia($snapshot->getMedia());

        return $page;
    }

}

差点忘了!!!我们需要说Sonata使用我们的Transformer类

parameters.yml

parameters:
    sonata.page.transformer.class: Application\Sonata\PageBundle\Entity\PageTransformer