Question

首先，我不知道如何正确描述我想要的东西，所以这个问题可能不会那么激动

我正在使用Symfony的框架和学说。我的主要目标是创建一个带有鉴别器列的单个表，并在每次提交上载文件时触发EventListener。

abstract class UploadFile {}

扩展它的三个类

class FanUploadFile extends UploadFile {}
class SupporterUploadFile extends UploadFile {}
class ProductionUploadFile extends UploadFile {}

我的EventListener

class UploadFileListener
{
    private $uploadDirs;
    private $targetDir;


    public function __construct(array $uploadDirs)
    {
        $this->uploadDirs = $uploadDirs;
        $this->targetDir = $uploadDirs['product_file'];

    }

    public function preUpdate(LifecycleEventArgs $args)
    {

        $entity = $args->getEntity();

        if ((!$entity instanceof Production) &&
            (!$entity instanceof  Fan) &&
            (!$entity instanceof  Supporter)) {return;}
        // loop over the uploaded files
        foreach ($entity->getUploadedFiles() as $uploadedFile) {
            // check if the file is to be uploaded
            if (!$uploadedFile instanceof UploadedFile)
                continue;

            $fileName = md5(uniqid()) . '.' .$uploadedFile->guessExtension();

             // case to instantiate new object for each case
            switch ($entity) {
                case $entity instanceof Production:
                    $pf = new ProductionUploadFile();
                    break;
                case $entity instanceof Fan:
                    $pf = new FanUploadFile();
                    break;
                case $entity instanceof Supporter:
                    $pf = new SupportUploadFile();
                    break;
            }


            $pf->setPath($fileName)
                ->setMimeType($uploadedFile->getMimeType())
                ->setClientName($uploadedFile->getClientOriginalName());
            $entity->addFile($pf);
            $uploadedFile->move($this->targetDir, $fileName);
        }
    }
}

此外我的映射（使用orm.xml）

<doctrine-mapping xmlns="http://doctrine-project.org/schemas/orm/doctrine-mapping"
                  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                  xsi:schemaLocation="http://doctrine-project.org/schemas/orm/doctrine-mapping http://doctrine-project.org/schemas/orm/doctrine-mapping.xsd">
<entity name="AppBundle\Entity\UploadFile" inheritance-type="SINGLE_TABLE">
        <discriminator-column name="discr" length="20" />
        <discriminator-map>
            <discriminator-mapping value="fan" class="FanUploadFile" />
            <discriminator-mapping value="support" class="SupportUploadFile" />
            <discriminator-mapping value="production" class="ProductionUploadFile" />
        </discriminator-map>
        <id name="id" type="integer">
            <generator strategy="AUTO" />
        </id>
        <field name="path" length="40" />
        <field name="mimeType" />
        <field name="clientName" />
    </entity>

其他课程

<doctrine-mapping xmlns="http://doctrine-project.org/schemas/orm/doctrine-mapping"
                  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                  xsi:schemaLocation="http://doctrine-project.org/schemas/orm/doctrine-mapping http://doctrine-project.org/schemas/orm/doctrine-mapping.xsd">

    <entity name="AppBundle\Entity\SupportUploadFile**" />

</doctrine-mapping>

**所有更改实体的类都相同

目前的错误是：Call to a member function setMimeType() on null

我应该使用哪种关系来映射实体，我无法做到 UploadFile中的访问方法和其他类都是空的。
然后我如何获取每个案例的数据。

如果我从UploadFile中移除摘要我
Entity 'AppBundle\Entity\UploadFile' has to be part of the discriminator map of 'AppBundle\Entity\UploadFile' to be properly mapped in the inheritance hierarchy.

但我不知道如何将UploadFiles映射到其他实体Production,Fan,Support。

基本上我有一个表格foreach表(Production,Fan,Support) 三个实体(FanUploadFile,ProductionUploadFile,SupportUploadFile) Mappedby：UploadFile 因此，当用户提交表单etc Production时我希望通过与UploadFile的ProductionUploadFile鉴别器映射将文件保存在discr Production中但我无法理解如何建立

之间的关系

生产＆lt; - ＆gt; UploadFile＆lt; - ＆gt; ProductionUploadFile

如何从doctrine的鉴别器映射实体中获取数据

0 个答案: