symfony4上传文件

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可以考虑使用VichUploaderBunde组件实现
手动处理分两种，一个是控制器直接处理 一个是注册服务，控制器引用

控制器处理

Entity引入 user Symfony\Compoent\Validator\Constraints as Assert

定义字段 @Assert\File(mimeTypes={"image/png","image/jpeg"})

表单类Form 引入字段 ->add('file',FileType::class), 编辑的时候可以加上参数['data_class'=>null,],否则会报错

新增提交后处理

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$file = $form->get('thumb')->getData();
if($file !== null){
    $fileName = $this->generateUniqueFileName() . '.' . $file->guessExtension();
    $file->move($this->getParameter('upload_path'),$fileName);
    $article->setThumb($fileName);
    $article = $form->getData();
}

设置上传路径参数 App\config\service.yaml

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parameters:
    upload_path: '%kernel.project_dir%/public/uploads'

服务

定义服务

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namespace App\Service;
use Symofny\Component\HttpFoundation\File\UploadFile;
class FileUploader
{
    private $targetDirectory;
    public function __construct($targetDirectory)
    {
        $this->targetDirectory = $targetDirectory;
    }
    public function upload(UploadFile $file)
    {
        $fileName = md5(uniqid()) . '.' . $file->guessExtension();
        $file->move($this->getTargetDirectory(),$fileName);
        return $fileName;
    }
    public function getTargetDirectory()
    {
        return $this->targetDirectory;
    }
}

注册服务

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#config/services.yaml
services:
    App\Service\FileUploader:
        arguments:
            $targetDirectory: '%upload_path%'

控制器使用

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use App\Service\FileUploader
public function add(Request $request,FileUploader $fileUploader)
{
    $file = $this->get('thumb')->getData();
    if($file !== null){
        $fileName = $fileUploader->upload($file);
        $article->setThumb($fileName);
    }
    $article = $form->getData();
}
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