Question

我正在制作一个需要多个图片上传选项的Symfony2应用程序。我使用cookbook条目上传了单个文件： How to handle File Uploads with Doctrine ，它可以正常工作。我已经实施了 lifecyclecallbacks 来上传和删除。

现在我需要将其转换为多重上传系统。我也从Stack Overflow中读到了一些答案，但似乎没什么用。

Stack Overflow问题：

Multiple file upload with Symfony2
multiple file upload symfony 2

目前我有以下代码：

文件实体：

<?php
namespace Webmuch\ProductBundle\Entity;

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


/**
 * @ORM\Entity
 * @ORM\HasLifecycleCallbacks
 */
class File
{
    /**
     * @ORM\Id
     * @ORM\Column(type="integer")
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    public $id;

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

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

    public function __construct()
    {

    }

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

    /**
     * Set path
     *
     * @param string $path
     */
    public function setPath($path)
    {
        $this->path = $path;
    }

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


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

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

    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 when displaying uploaded doc/image in the view.
        return 'uploads';
    }

    /**
     * @ORM\PrePersist()
     * @ORM\PreUpdate()
     */
    public function preUpload()
    {
        if (null !== $this->file) {
            // do whatever you want to generate a unique name
            $this->path[] = uniqid().'.'.$this->file->guessExtension();
        }
    }

    /**
     * @ORM\PostPersist()
     * @ORM\PostUpdate()
     */
    public function upload()
    {
        if (null === $this->file) {
            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
        $this->file->move($this->getUploadRootDir(), $this->path);

        unset($this->file);
    }

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

FileController ：

<?php

namespace Webmuch\ProductBundle\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Method;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Template;

use Webmuch\ProductBundle\Entity\File;


/**
 * File controller.
 *
 * @Route("/files")
 */
class FileController extends Controller
{
    /**
     * Lists all File entities.
     *
     * @Route("/", name="file_upload")
     * @Template()
     */
    public function uploadAction()
    {
        $file = new File();
        $form = $this->createFormBuilder($file)
            ->add('file','file',array(
                    "attr" => array(
                        "accept" => "image/*",
                        "multiple" => "multiple",
                    )
                ))
            ->getForm()
        ;

        if ($this->getRequest()->getMethod() === 'POST') {
            $form->bindRequest($this->getRequest());
                $em = $this->getDoctrine()->getEntityManager();

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

                $this->redirect($this->generateUrl('file_upload'));
        }

        return array('form' => $form->createView());
    }
}

和 upload.html.twig ：

{% extends '::base.html.twig' %}

{% block body %}
<h1>Upload File</h1>

<form action="#" method="post" {{ form_enctype(form) }}>

    {{ form_widget(form.file) }} 

    <input type="submit" value="Upload" />
</form>
{% endblock %}

我不知道如何使其作为多文件上传系统工作。我保留了我所遵循的教程中的评论，因此我记得在做什么。

更新

新表格代码：

$images_form = $this->createFormBuilder($file)
    ->add('file', 'file', array(
            "attr" => array(
                "multiple" => "multiple",
                "name" => "files[]",
            )
        ))
    ->getForm()
;

新表格Twig代码：

<form action="{{ path('file_upload') }}" method="post" {{ form_enctype(images_form) }}>

    {{ form_label(images_form.file) }}
    {{ form_errors(images_form.file) }}
    {{ form_widget(images_form.file, { 'attr': {'name': 'files[]'} }) }}

    {{ form_rest(images_form) }}
    <input type="submit" />
</form>

Answer 1

这是一个已知问题as referenced on GitHub。

正如他们所说，您应该将[]附加到模板中的full_name属性中：

{{ form_widget(images_form.file, { 'full_name': images_form.file.get('full_name') ~ '[]' }) }}

Answer 2

我不知道注释语法是否可行。所以我将在控制器中的普通PHP中编写它

$images_form = $this->createFormBuilder($file)
    ->add('file', 'file', array(
        'constraints' => array(
            new NotBlank(), // Makes sure it is filled at all.
            new All(array( // Validates each an every entry in the array that is uploaded with the given constraints.
                'constraints' => array(
                    new File(array(
                        'maxSize' => 6000000
                    )),
                ),
            )),
        ),
        'multiple' => TRUE,
    ))
    ->getForm();

从Symfony 2.4开始，这应该是完美的。在此之前，您必须像{Q}}那样将multiple属性放在attr键中。

正如我所说，你必须使用注释来完成这项工作。如果你必须把它全部放在一行，它可能会起作用，但可能性较差。

玩得开心;）

Answer 3

我最近遇到了同样的问题，按照这里的建议，但是出了错误，因为验证器“文件”无法处理数组。

所以我必须编写自己的验证器，它可以处理多个文件。为此，我跟着this tutorial from Symfony.com，从其中的验证器'file'复制/粘贴代码，用foreach循环封装它并根据需要更改变量。

如果您这样做，可以将其用于实体中的$file。

Symfony2中多文件上载的问题

3 个答案: