OroPlatform：向实体添加文件关系

Question

上下文

我目前正在尝试将文件关系添加到我的 OroPlatform 项目的实体。 目标是让用户有机会在特定实体的创建/更新视图上上传文件。

我在 OroPlatform 文档中阅读了我必须创建一个新的迁移：https://doc.oroinc.com/master/backend/bundles/platform/AttachmentBundle/attachment-bundle-config/#attachment-bundle-file-types

这是我创建的迁移：

<?php

namespace Baltimore\Bundle\AppBundle\Migrations\Schema\v1_1_1;

use Doctrine\DBAL\Schema\Schema;

use Oro\Bundle\AttachmentBundle\Migration\Extension\AttachmentExtension;
use Oro\Bundle\AttachmentBundle\Migration\Extension\AttachmentExtensionAwareInterface;
use Oro\Bundle\MigrationBundle\Migration\Migration;
use Oro\Bundle\MigrationBundle\Migration\QueryBag;

class AddAttachmentToBusinessUnit implements Migration, AttachmentExtensionAwareInterface
{
    /** @var AttachmentExtension */
    protected $attachmentExtension;

    /**
     * {@inheritdoc}
     */
    public function setAttachmentExtension(AttachmentExtension $attachmentExtension)
    {
        $this->attachmentExtension = $attachmentExtension;
    }

    /**
     * {@inheritdoc}
     */
    public function up(Schema $schema, QueryBag $queries)
    {
        $this->attachmentExtension->addFileRelation(
            $schema,
            'oro_business_unit',
            'document',
            [],
            15
        );
    }
}

我已将此行添加到我的实体的update.html.twig：form_row(form.document)

问题

当我尝试访问更新页面时，出现以下错误：

"Neither the property "document" nor one of the methods "document()", "getdocument()"/"isdocument()"/"hasdocument()" or "__call()" exist and have public access in class "Symfony\Component\Form\FormView"."

我已经预热缓存以便为我的类生成访问器，并且方法getDocument()存在于生成的文件EX_OroOrganizationBundle_BusinessUnit.php中

另外，该属性似乎已成功添加到我的实体中：

Answer 1

要添加新的表单字段，首先，您必须在表单类型扩展中定义它，然后您就可以从模板中访问它。

见How to Create a Form Type Extension。

Answer 2

终于我的需求发生了变化，但我想我有解决这个问题的答案。
这是我要做的：

/**
* {@inheritdoc}
*/
public function up(Schema $schema, QueryBag $queries)
{
   $this->attachmentExtension->addFileRelation(
      $schema,
      'oro_business_unit',
      'document',
      [
         'extend' => [
             'owner' => ExtendScope::OWNER_CUSTOM,
             'is_extend' => true
          ],
          'entity' => ['label'=>'oro.organization.businessunit.entity_label'],
      ],
      15
   );
}