我如何在自定义存储库中注入类-Symfony 2.7 [英] How can i inject class inside custom repository - Symfony 2.7

问题描述

我有自定义存储库类，在其中必须注入可帮助我上传文件并在需要时擦除文件的类。我扩展了EntityRepository构造函数，但是我不知道如何在自定义存储库类中添加第三个参数。

I have custom repository class in which i must inject class that helps me to upload file, and erase file if needed. I expanded EntityRepository constructor, but i don't know how to add third argument inside custom repository class.

    class NewRepository extends EntityRepository
    {

        protected $fileUploader;



        public function __construct(EntityManager $em, Mapping\ClassMetadata $class,FileUploader $fileUploader)
        {
            parent::__construct($em, $class);
        }

        public function create($data, Item $item = null)
        {
            $em = $this->getEntityManager();
            if(!$item) $item = new Item();

            if(isset($data['file'])) {
                $image = $this->fileUploader->setFile($data['file'])->uploadFile();
                $data['filename'] = $image['filename'];
                $data['image_url'] = $image['file_url'];
            }

            $item->setTitle($data['title']);
            $item->setDescription($data['description']);

            $em->persist($item);
            $em->flush($item);

            return $item;
        }

    }

我总是会错误地认为第三个参数传递给构造函数的值为null。

I always get error that third argument passed to constructor is null.

推荐答案

自版本2.4开始，Doctrine使用 RepositoryFactory 用于实例化存储库，并作为启动程序为您提供< a href = https://github.com/doctrine/doctrine2/blob/ee066cc5de7e8726d0be7a2d241235ba6c033cf8/lib/Doctrine/ORM/Repository/DefaultRepositoryFactory.php rel = nofollow noreferrer> DefaultRepositoryFactory 。为了能够将更多的依赖项注入到您的存储库中，您需要对上述工厂进行自己的实现（为简便起见，我省略了所有 use 语句）：

Since version 2.4 Doctrine uses a RepositoryFactory for instantiating repositories and as a starter provides you with DefaultRepositoryFactory. To be able to inject additional dependencies into your repositories you need to roll your own implementation of aforementioned factory (I'm omitting all the use statements for brevity):

class YourRepositoryFactory implements RepositoryFactory
{
    private $fileUploader;

    public function __construct(FileUploader $fileUploader)
    {
        $this->fileUploader = $fileUploader;
    }

    public function getRepository(EntityManagerInterface $entityManager, $entityName)
    {
        $repositoryHash = $entityManager->getClassMetadata($entityName)->getName() . spl_object_hash($entityManager);
        if (isset($this->repositoryList[$repositoryHash])) {
            return $this->repositoryList[$repositoryHash];
        }
        return $this->repositoryList[$repositoryHash] = $this->createRepository($entityManager, $entityName);
    }

    private function createRepository(EntityManagerInterface $entityManager, $entityName)
    {
        /* @var $metadata \Doctrine\ORM\Mapping\ClassMetadata */
        $metadata            = $entityManager->getClassMetadata($entityName);
        $repositoryClassName = $metadata->customRepositoryClassName
            ?: $entityManager->getConfiguration()->getDefaultRepositoryClassName();

        switch ($repositoryClassName) {
            case NewRepository::class:
                return new $repositoryClassName($entityManager, $metadata, $this->fileUploader);
            default:
                return new $repositoryClassName($entityManager, $metadata);
        }
    }
}

将工厂注册为服务，您需要使用以下方式调整教义的配置：

After registering your factory as a service in the way you prefer you need to adjust doctrine configuration with:

doctrine:
    orm:
        repository_factory: name.of.your.factory.service

你很好！

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