php - 使用 liipImagineBundle 更新/删除记录时删除/更新缓存图像

Question

我是 symfony2 的新手。我正在使用 liipImagineBundle 来管理图像缩略图。我有一个使用生命周期回调来管理产品图像的产品实体类。

产品.php

<?php

namespace Svipl\AdminBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Gedmo\Mapping\Annotation as GEDMO;
use Symfony\Component\HttpFoundation\File\UploadedFile;

/**
 * Svipl\AdminBundle\Entity\Product
 * @ORM\Entity
 * @ORM\Table(name="product")
 * @ORM\Entity(repositoryClass="Svipl\AdminBundle\Entity\ProductRepository")
 * @ORM\HasLifecycleCallbacks
 */
class Product{
    /**
     * @ORM\Column(type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @ORM\Column(type="string", length=25, unique=true)
     */
    private $name;

    /**
     * @ORM\Column(type="text")
     */
    private $description;

    /**
     * @ORM\Column(type="float", length=8)
     * @var unknown
     */
    private $price;

    /**
     * @GEDMO\Timestampable(on="update")
     * @ORM\Column(name="updated_at", type="datetime")
     */
    private $updated_at;

    /**
     * @GEDMO\Timestampable(on="create")
     * @ORM\Column(name="created_at", type="datetime")
     */
    private $created_at;

    /**
     * @ORM\ManyToOne(targetEntity="Category", inversedBy="products")
     * @ORM\JoinColumn(name="category_id", referencedColumnName="id")
     */
    protected $category;

    /**
     * @ORM\Column(name="image", type="string", length=50)
     */
    private $image;

    public function getAbsolutePath()
    {
        return null === $this->image
        ? null
        : $this->getUploadRootDir().'/'.$this->image;
    }

    public function getWebPath()
    {
        return null === $this->image
        ? null
        : $this->getUploadDir().'/'.$this->image;
    }

    protected function getUploadRootDir()
    {
        // the absolute directory path where uploaded
        // documents should be saved
        return __DIR__.'/../../../../web/'.$this->getUploadDir();
    }

    protected function getUploadDir()
    {
        // get rid of the __DIR__ so it doesn't screw up
        // when displaying uploaded doc/image in the view.
        return 'uploads/product';
    }

    private $file;

    /**
     * Get file.
     *
     * @return UploadedFile
     */
    public function getFile()
    {
        return $this->file;
    }

    /**
     * Get id
     *
     * @return integer 
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * Set name
     *
     * @param string $name
     * @return Product
     */
    public function setName($name)
    {
        $this->name = $name;

        return $this;
    }

    /**
     * Get name
     *
     * @return string 
     */
    public function getName()
    {
        return $this->name;
    }

    /**
     * Set description
     *
     * @param string $description
     * @return Product
     */
    public function setDescription($description)
    {
        $this->description = $description;

        return $this;
    }

    /**
     * Get description
     *
     * @return string 
     */
    public function getDescription()
    {
        return $this->description;
    }

    /**
     * Set price
     *
     * @param float $price
     * @return Product
     */
    public function setPrice($price)
    {
        $this->price = $price;

        return $this;
    }

    /**
     * Get price
     *
     * @return float 
     */
    public function getPrice()
    {
        return $this->price;
    }

    /**
     * Set updated_at
     *
     * @param \DateTime $updatedAt
     * @return Product
     */
    public function setUpdatedAt($updatedAt)
    {
        $this->updated_at = $updatedAt;

        return $this;
    }

    /**
     * Get updated_at
     *
     * @return \DateTime 
     */
    public function getUpdatedAt()
    {
        return $this->updated_at;
    }

    /**
     * Set created_at
     *
     * @param \DateTime $createdAt
     * @return Product
     */
    public function setCreatedAt($createdAt)
    {
        $this->created_at = $createdAt;

        return $this;
    }

    /**
     * Get created_at
     *
     * @return \DateTime 
     */
    public function getCreatedAt()
    {
        return $this->created_at;
    }

    /**
     * Set category
     *
     * @param \Svipl\AdminBundle\Entity\Category $category
     * @return Product
     */
    public function setCategory(\Svipl\AdminBundle\Entity\Category $category = null)
    {
        $this->category = $category;

        return $this;
    }

    /**
     * Get category
     *
     * @return \Svipl\AdminBundle\Entity\Category 
     */
    public function getCategory()
    {
        return $this->category;
    }

    /**
     * Set image
     *
     * @param string $image
     * @return Product
     */
    public function setImage($image)
    {
        $this->image = $image;

        return $this;
    }

    /**
     * Get image
     *
     * @return string 
     */
    public function getImage()
    {
        return $this->image;
    }

    private $temp;

    /**
     * Sets file.
     *
     * @param UploadedFile $file
     */
    public function setFile(UploadedFile $file = null)
    {
        $this->file = $file;
        // check if we have an old image path
        if (isset($this->image)) {
            // store the old name to delete after the update
            $this->temp = $this->image;
            $this->image = null;
        } else {
            $this->image = 'initial';
        }
    }

    /**
     * @ORM\PrePersist()
     * @ORM\PreUpdate()
     */
    public function preUpload()
    {
        if (null !== $this->getFile()) {
            // do whatever you want to generate a unique name
            $filename = sha1(uniqid(mt_rand(), true));
            $this->image = $filename.'.'.$this->getFile()->guessExtension();
        }
    }

    /**
     * @ORM\PostPersist()
     * @ORM\PostUpdate()
     */
    public function upload()
    {
        if (null === $this->getFile()) {
            return;
        }

        // if there is an error when moving the file, an exception will
        // be automatically thrown by move(). This will properly prevent
        // the entity from being persisted to the database on error
        $this->getFile()->move($this->getUploadRootDir(), $this->image);

        // check if we have an old image
        if (isset($this->temp)) {
            // delete the old image
            unlink($this->getUploadRootDir().'/'.$this->temp);
            // clear the temp image path
            $this->temp = null;
        }
        $this->file = null;
    }

    /**
     * @ORM\PostRemove()
     */
    public function removeUpload()
    {
        if ($file = $this->getAbsolutePath()) {
            unlink($file);
        }
    }
}

配置.yml

...
liip_imagine:
    filter_sets:
        my_thumb:
            quality: 75
            filters:
                thumbnail: { size: [120, 90], mode: outbound }

缩略图生成代码

...

<img src="{{ asset('uploads/product/' ~ form_object.vars.value.image) | imagine_filter('my_thumb', true) }}" />

...

正确生成缩略图。

但我无法找到在原始图像更改或使用表单删除时更新/删除缓存图像的方法。

Answer 1

您应该注册一个 preUpdate 和一个 preRemove event listener/subscriber ，注入(inject)所需的服务并删除其中的图像。

由于您无权访问服务容器(并且您不应将服务注入(inject)您的实体)，您无法使用生命周期事件查询 LiipImagineBundle 的服务以从您的实体内部获取缓存文件。

你可以注入(inject)服务liip_imagine.cache.manager并使用它的 remove()从缓存中删除图像的方法。