如何使用Gaufrette和Symfony 3.0

Question

我在弄清楚如何在Gaufete中使用Symfony 3.0以便上传到s3存储桶时遇到了一个问题。

根据文档：https://github.com/KnpLabs/KnpGaufretteBundle

我已经设置了config.yml：

knp_gaufrette:
    adapters:
        photostorage:
            amazon_s3:
                amazon_s3_id:   amazonS3
                bucket_name:    '%save_location%'
                options:
                    directory:  'symphotest'

和services.yml：

services:
    amazonS3:
         class: Aws\S3\S3Client
        factory_class: Aws\S3\S3Client
        factory_method: 'factory'
        arguments:
            key: %amazon_s3.key%
            secret: %amazon_s3.secret%
            region: %amazon_s3.region%

因为我想使用自定义的环境变量，所以我给它传递了一个文件params.php：

  $container->setParameter('save_type','s3');
  $container->setParameter('save_location',getenv('BUCKET'));
  $container->setParameter('aws_key',getenv('S3_ACCESS'));
  $container->setParameter('aws_secret_key',getenv('S3_SECRET'));

我将其包含在config.yml顶部的位置：

imports:
    - { resource: params.php }
    - { resource: security.yml }
    - { resource: services.yml }

我创建了一个名为Images.php的实体：

<?php

namespace AppBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\HttpFoundation\File\UploadedFile;
use Symfony\Component\Validator\Constraints as Assert;

use Gaufrette\Adapter\AwsS3 as AwsS3Adapter;
use Gaufrette\Filesystem;

/**
* @ORM\Entity
* @ORM\Table(name="images")
* @ORM\HasLifecycleCallbacks
*/
class Images
{
  /**
   * @ORM\Column(type="string", length=60)
   * @ORM\Id
   * @ORM\GeneratedValue(strategy="CUSTOM")
   * @ORM\CustomIdGenerator(class="AppBundle\Doctrine\AutoIdGenerate")
   */
  private $id;

  /**
  * @ORM\Column(type="string", length=100)
  */
  private $name;

  /**
  * @ORM\Column(type="string", length=100)
  */
  private $name_small;

  /**
  * @ORM\ManyToOne(targetEntity="AppBundle\Entity\ImageGroups", inversedBy="images")
  */
  private $users;

  /**
  * @Assert\File(maxSize="6000000")
  */
  private $file;

  private $tmp;
  private $path;

  public function getFile()
  {
    return $file;
  }

  public function setFile(UploadedFile $file = null)
  {
    $this->file=$file;

  };


  public function __construct()
  {
    //IDK what to do here
  }

  /**
    * @ORM\PrePersist()
    * @ORM\PreUpdate()
    */
   public function preUpload()
   {
       if (null !== $this->getFile())
       {
           $filename = sha1(uniqid(gethostname(), true));
           $this->name = $filename.'.'.$this->getFile()->guessExtension();
           $this->$name_small='small'.$filename.'.'.$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->path);

       // 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()
   {
       $file = $this->getAbsolutePath();
       if ($file)
       {
         //Do stuff for Deleting
       }
   }


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


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

  /**
   * Get nameSmall
   *
   * @return string
   */
  public function getNameSmall()
  {
      return $this->name_small;
  }
}

但是我不知道如何获得S3适配器和客户端，因为在本例中：https://github.com/KnpLabs/Gaufrette/blob/master/doc/adapters/awsS3.md

在中启动s3客户端和文件系统。但是在Symfony 3.0上，我已经在config.yml上配置了它们。因此，一定有另一种方法来获得它们。

我只想要一个用法的例子。

Answer 1

我推荐你阅读这篇文章：https://blog.fortrabbit.com/new-app-cloud-storage-s3

Is是一个快速入门指南，它讲述了为什么可以使用分散存储，并涵盖了以下主题：

• 如何注册AWS帐户
• 如何创建第一个S3存储桶容器-文件的命名空间
• 如何设置适当的权限-使用其他凭据进行安全访问

或者，我对LeaguePHP适配器有很好的体验：

League\Flysystem\AwsS3v3

它提供了一个简单的api来使用amazon web服务来处理文件和内容！它可以独立兼容，也可以使用Symfony或laravel。请查看文档。您可以在源文件夹中看到这些方法。

Answer 2

不要将服务注入实体:这是不好的做法。

改用信条事件订阅者:如Symfony docs上所述

# app/config/services.yml
services:
    # ...
    AppBundle\EventListener\SearchIndexerSubscriber:
        tags:
            - { name: doctrine.event_subscriber }

事件订阅者：

// src/AppBundle/EventListener/SearchIndexerSubscriber.php
namespace AppBundle\EventListener;

use AppBundle\Entity\Product;
use Doctrine\Common\EventSubscriber;
// for Doctrine < 2.4: use Doctrine\ORM\Event\LifecycleEventArgs;
use Doctrine\Common\Persistence\Event\LifecycleEventArgs;
use Doctrine\ORM\Events;

class SearchIndexerSubscriber implements EventSubscriber
{
    public function getSubscribedEvents()
    {
        return [
            Events::postPersist,
            Events::postUpdate,
        ];
    }

    public function postUpdate(LifecycleEventArgs $args)
    {
        $this->index($args);
    }

    public function postPersist(LifecycleEventArgs $args)
    {
        $this->index($args);
    }

    public function index(LifecycleEventArgs $args)
    {
        $entity = $args->getObject();

        // perhaps you only want to act on some "Product" entity
        if ($entity instanceof Product) {
            $entityManager = $args->getObjectManager();
            // ... do something with the Product
        }
    }
}