Symfony 4 - LiipImagine - 侦听器删除我的所有目录（缓存清除侦听器）

Question

我有一个 symfony 4 项目，其中的用户实体与头像实体（使用 VichUploaderBundle 上传的图像）有关系。

在Avatar.php中：

/**
 * @ORM\Column(type="string", length=255, nullable=true)
 */
private $imageName;

/**
 * NOTE: This is not a mapped field of entity metadata, just a simple property.
 * 
 * @Assert\Image(
 *  mimeTypes="image/jpeg")
 * @Vich\UploadableField(mapping="avatar", fileNameProperty="imageName", size="imageSize")
 * 
 * @var File|null
 */
private $imageFile;

在User.php中：

/**
 * @ORM\OneToOne(targetEntity="App\Entity\Avatar", mappedBy="user", cascade={"persist", "remove"})
 */
private $avatar;

我有一个个人资料页面来编辑用户的数据（名字、姓氏、邮件、头像）。在这个页面中，我使用LiipImagineBundle在某个维度显示当前头像。

当用户编辑他的个人资料时，我希望听众可以检查头像是否有变化。在这种情况下，它会删除旧媒体/缓存。

所以我为此创建了一个监听器：

<?php

namespace App\Listener;

use App\Entity\Avatar;
use Doctrine\Common\EventSubscriber;
use Doctrine\ORM\Event\LifecycleEventArgs;
use Doctrine\ORM\Event\PreUpdateEventArgs;
use Liip\ImagineBundle\Imagine\Cache\CacheManager;
use Symfony\Component\HttpFoundation\File\UploadedFile;
use Vich\UploaderBundle\Templating\Helper\UploaderHelper;

class ImageCacheSubscriber implements EventSubscriber
{

    /**
     * CacheManager
     *
     * @var CacheManager
     */
    private $cacheManager;

    /**
     * UploaderHelper
     *
     * @var UploaderHelper
     */
    private $uploaderHelper;

    public function __construct(CacheManager $cacheManager, UploaderHelper $uploaderHelper)
    {
        $this->cacheManager = $cacheManager;
        $this->uploaderHelper = $uploaderHelper;
    }

    public function getSubscribedEvents()
    {
        return [
            'preRemove',
            'preUpdate'
        ];
    }

    public function preRemove(LifecycleEventArgs $args)
    {

        $entity = $args->getEntity();
        if (!$entity instanceof Avatar) {
            return;
        }

        $this->cacheManager->remove($this->uploaderHelper->asset($entity, 'imageFile'));
    }

    public function preUpdate(PreUpdateEventArgs $args)
    {
        dump($args->getEntity());
        dump($args->getObject());

        $entity = $args->getEntity();
        if (!$entity instanceof Avatar) {
            return;
        }

        if ($entity->getImageFile() instanceof UploadedFile) {
            $this->cacheManager->remove($this->uploaderHelper->asset($entity, 'imageFile'));
        }
    }
}

Services.yaml:

  App\Listener\ImageCacheSubscriber:
    tags:
      - { name: doctrine.event_subscriber }

但是当我更改头像时，侦听器会删除媒体中包含头像的整个文件夹。

他让我犯了这个错误：

Failed to remove directory "C:\Users\user\Desktop\congesTest2/public/media/cache/avatar_big\files": rmdir(C:\Users\user\Desktop\congesTest2/public/media/cache/avatar_big\files): Directory not empty.

我不明白为什么...:'(

编辑：

我将函数 preUpdate() 更新为 postUpdate() :

public function getSubscribedEvents()
    {
        return [
            'preRemove',
            'postUpdate'
        ];
    }
public function postUpdate(LifecycleEventArgs $args)
    {
        dump($args->getEntity());

        $entity = $args->getEntity();
        if (!$entity instanceof Avatar) {
            return;
        }

        if ($entity->getImageFile() instanceof UploadedFile) {
            $this->cacheManager->remove($this->uploaderHelper->asset($entity, 'imageFile'));
        }
    }

现在，如果我转储：

    dd($this->uploaderHelper->asset($entity, 'imageFile'));

我已经：

"/images/avatar/avatar3.jpg" And this is the good path ! On the other hand, the image is not removed from the cache! The remove () function does not seem to give anything it's amazing

通过实体的转储，我看到该文件不再是一个 UploadedFile，而是一个简单的文件。而之前它看起来像一个 UploadedFile。所以我改变了行

if ($entity->getImageFile() instanceof UploadedFile)

来自

if ($entity->getImageFile() instanceof File)

但图片仍未从缓存中删除。

在我看来，由于这是一个 postUpdate，它会删除新的缓存图像，而不是旧的。但由于用户被重定向到同一页面，他在缓存后立即交付。（编辑：不，我做了测试，图像甚至没有从缓存中删除）

Answer 1

当您使用 VichUploaderBundle 时，不需要创建您自己的侦听器。确保生命周期事件配置正确，Vich 应该负责删除旧图像。

# config/packages/vich_uploader.yaml or app/config/config.yml
vich_uploader:
    db_driver: orm
    mappings:
        product_image:
            uri_prefix: /images/products
            upload_destination: '%kernel.project_dir%/public/images/products'

            inject_on_load: false
            delete_on_update: true
            delete_on_remove: true

https://github.com/dustin10/VichUploaderBundle/blob/master/Resources/doc/usage.md#step-3-configure-the-lifecycle-events-optional-step

Answer 2

您可以监听 vich_uploader.pre_remove 事件，而不是监听 Doctrine 事件。这将确保您每次都能获得需要删除的旧图像。首先，确保您的 VichUploader 配置设置为在更新和删除时删除文件。这是默认值。

# config/packages/vich_uploader.yaml

vich_uploader:
    mappings:
        avatar:
            upload_destination: '%kernel.project_dir%/public/uploads/avatar'
            uri_prefix: 'uploads/avatar'

            delete_on_update: true
            delete_on_remove: true

现在您需要创建侦听器。

// src/EventListener/ImageCacheSubscriber.php

namespace App\EventListener;

use Liip\ImagineBundle\Imagine\Cache\CacheManager;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Vich\UploaderBundle\Event\Event;
use Vich\UploaderBundle\Event\Events;
use Vich\UploaderBundle\Storage\StorageInterface;

class ImageCacheSubscriber implements EventSubscriberInterface
{
    private $storage;
    private $cacheManager;

    public function __construct(StorageInterface $storage, CacheManager $cacheManager)
    {
        $this->storage = $storage;
        $this->cacheManager = $cacheManager;
    }

    public function onRemove(Event $event)
    {
        $path = $this->storage->resolveUri($event->getObject(), $event->getMapping()->getFilePropertyName());
        $this->cacheManager->remove($path);
    }

    public static function getSubscribedEvents()
    {
        return [Events::PRE_REMOVE => 'onRemove'];
    }
}

当删除任何 VichUploader 资产时，此侦听器将尝试将其从所有过滤器的缓存中删除。如果愿意，您可以在 CacheManager::remove() 方法中指定特定的过滤器。您也可以仅通过检查 $event->getObject().

的实例来删除特定实体的缓存

这也对您的 LiipImagine 配置做出了一些假设。如果您使用默认加载程序和缓存解析器，这应该可以工作。如果您使用的是自定义加载器或解析器，您可能需要根据需要修改此侦听器。

# config/packages/liip_imagine.yaml

liip_imagine:
    resolvers:
        default:
            web_path:
                web_root: '%kernel.project_dir%/public'
                cache_prefix: 'media/cache'

    loaders:
        default:
            filesystem:
                data_root:
                    - '%kernel.project_dir%/public'

    filter_sets:
        cache: ~

        # Your filters...

如果您使用的是 Symfony Flex，那么您就完成了。否则，请确保将侦听器注册为服务。

# config/services.yaml

services:
    # ...
    App\EventListener\ImageCacheSubscriber:
        arguments: ['@vich_uploader.storage.file_system', '@liip_imagine.cache.manager']
        tags:
            - { name: kernel.event_subscriber }

Symfony 4 - LiipImagine - 侦听器删除我的所有目录（缓存清除侦听器）

Symfony 4 - LiipImagine - Listener delete all my directory (cache clear listener)

php

symfony

caching

listener

liipimaginebundle