在 Symfony2 中分解实体对象

Question

我正在尝试在我的 Symfony2 Web 应用程序中创建画廊。

每个帖子可能有也可能没有画廊。我的画廊是文本映射类型，在 Post 实体/类下：

#Post.orm.yml

MyProject\MyProjectBundle\Entity\Post:
type: entity
table: post
repositoryClass: MyProject\MyProjectBundle\Entity\PostRepository
    id:
        id:
            type: integer
            generator: { strategy: AUTO }
    fields:
        # ...
        gallery:
            type: text
            nullable: true
        #...

由于画廊中有很多图像，我认为通过我的数据夹具用逗号分隔每个图像是有意义的：

image1.png, image2.jpg, examplename-3rdimage.gif, 4thandfinal.jpg

但是，我希望画廊在查看时输出如下：

<li>image1.png</li>
<li>image2.jpg</li>
<li>examplename-3rdimage.gif</li>
<li>4thandfinal.jpg</li>

然后我的控制器调用 Post Entity：

/* PostController.php */

public function postshowAction($id)
{
    $em = $this->getDoctrine()->getManager();

    $entities = $em->getRepository('MPMPBBundle:Post')->find($id);

    $gallery = $em->getRepository('MPMPBBundle:Post')->getGallery();


    if (!$entities) {
        throw $this->createNotFoundException('Unable to find Post entity.');
    }

    return $this->render('MPMPBBundle:Post:postshow.html.twig', array(
        'entities'      => $entities,
        'gallery'       => $gallery
    ));
}

您可能已经注意到，我从我的存储库类中引用了函数：getGallery()：PostRepository：

/* PostRepository.php */

class PostRepository extends EntityRepository
{
    public function getGallery()
    {
        $postGallery = $this->createQueryBuilder('e')
                            ->select('e.gallery')
                            ->getQuery()
                            ->getResult();

        $gallery = array();
        foreach ($postGallery as $postGal)
        {
            $gallery = array_merge(explode(",", $postGal['gallery']), $gallery);
        }

        foreach ($gallery as &$gal)
        {
            $gal = trim($gal);
        }

        return $gallery;
    }
}

最后，我的树枝文件：postshow.html.twig，看起来像这样：

{% for gallery in gallery %}
    <li>{{ gallery }}</li>
{% endfor %}

澄清一下，我希望实现的是：

# mysite.com/post/post-1

<li>image1.png</li>
<li>image2.jpg</li>
<li>examplename-3rdimage.gif</li>
<li>4thandfinal.jpg</li>

# mysite.com/post/post-2

<li>image5.png</li>
<li>image11.jpg</li>
<li>examplename-18thimage.gif</li>
<li>22ndandfinal.jpg</li>

每个帖子都显示其各自的图库。

通过上面写的内容，实现的是每个Post 中的所有Gallery 项目都被输出，而我只需要单个帖子的画廊项目：

# mysite.com/post/post-1

<li>image1.png</li>
<li>image2.jpg</li>
<li>examplename-3rdimage.gif</li>
<li>4thandfinal.jpg</li>
<li>image5.png</li>
<li>image11.jpg</li>
<li>examplename-18thimage.gif</li>
<li>22ndandfinal.jpg</li>

# mysite.com/post/post-2

<li>image1.png</li>
<li>image2.jpg</li>
<li>examplename-3rdimage.gif</li>
<li>4thandfinal.jpg</li>
<li>image5.png</li>
<li>image11.jpg</li>
<li>examplename-18thimage.gif</li>
<li>22ndandfinal.jpg</li>

Answer 1

gallery字段在Post表中，所以你不需要在db中再次查询，只需从当前实体中获取gallery和explode()这样：

/* PostController.php */

public function postshowAction($id)
{
    $em = $this->getDoctrine()->getManager();

    $entities = $em->getRepository('MPMPBBundle:Post')->find($id);

    $gallery = null;
    if (null !== $entities->getGallery())
    {
        $gallery = explode(",", $entities->getGallery());
        $gallery = array_map("trim", $gallery);
    }

    if (!$entities) {
        throw $this->createNotFoundException('Unable to find Post entity.');
    }

    return $this->render('MPMPBBundle:Post:postshow.html.twig', array(
        'entities'      => $entities,
        'gallery'       => $gallery
    ));
}