使用Symfony表单上传多个文件

Question

更新 在我的Symfony项目中,我可以上传单个图像.现在我正在尝试上传多个图像.

class ImageFile extends AbstractType
{
    /**
     * @param FormBuilderInterface $builder
     * @param array $options
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('images', FileType::class, array(
                'attr' => array(
                    'accept' => 'image/*',
                    'multiple' => 'multiple'
                )
            ))
            ->add('save',SubmitType::class,array('label'=>'Insert Image','attr'=>array('class'=>'btn btn-primary','style'=>'margin-bottom:15px')))
        ;
    }

    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => images::class
        ));
    }
}

在我的Images实体中,我保留了一个像这样的SatellieImage对象数组.

class images
{
    /**
     * @var int
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

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

    /**
     * @var satelliteImage[]
     * @ORM\Column(name="images", type="string")
     *
     */
    private $images;

    /**
     * Set images
     *
     * @param string $images
     *
     * @return satelliteImage[]
     */
    public function setImages($images)
    {
        $this->images = $images;

        return $this->images;
    }

    /**
     * Get images
     *
     * @return satelliteImage[]
     */
    public function getImages()
    {
        return $this->images;
    }

    public function addImage($image)
    {
        $this->images[] = $image;

        return $this;
    }
}

在我的控制器中,我将satelliteImage []存储为$ files并运行foreach循环以上传()每个文件(upload()函数完美地用于单个文件)

public function uploadImages(Request $request)
    {
        $satelliteImage=new satelliteImage;
        $images=new images();

        $form = $this->createForm(ImageFile::class, $images);
        $form->handleRequest($request);

        $files=$images->getImages();

        foreach ($files as $file){
            $em=$this->getDoctrine()->getManager();

            $file->upload();

            $em->persist($satelliteImage);
            $em->flush();
        }
        $this->addFlash(
            'notice',
            'Images inserted successfully'
        );

        return $this->redirectToRoute('satellite_images');
    }

问题:我收到错误提示"警告:为foreach提供的参数无效()"如何解决这个问题？

Answer 1

我认为你在这里要做的就是为你的ImageFile班级添加'multiple'属性;

请参阅Symfony文档.

use Symfony\Component\Form\Extension\Core\Type\FileType;

class ImageFile extends AbstractType
{
    /**
     * @param FormBuilderInterface $builder
     * @param array $options
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('images', FileType::class, [
                'multiple' => true,
                'attr'     => [
                    'accept' => 'image/*',
                    'multiple' => 'multiple'
                ]
            ])
        ;
    }
}

另外,将"图片"属性更改为"图片"属性:

/**
 * Set images
 *
 * @param string $images
 *
 * @return satelliteImage[]
 */
public function setImages($images)
{
    $this->images = $images;

    return $this;
}

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

public function addImage($image)
{
    $this->images[] = $image;

    return $this;
}

对此进行排序后,可以修改upload方法以处理FormType中的多个文件.