以symfony形式上传文件

我在从表单上载文件时遇到问题。 我做错了什么？

错误为：

需要类型为"；AppEntityImage"；、实例为"；的参数 在酒店提供的SymfonyComponentHttpFoundationFileUploadedFile"； 路径&q；文件&q；。

表单->；handleRequest(Object(Request))中 C:xampphtdocsiurosrcControllerOfferController.php(第29行)

我的代码：

类OfferType：

class OfferType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('name', TextType::class)
            ->add('description', TextareaType::class)
            ->add('files',FileType::class, [
                'multiple' => true
                ]
            )

类OfferController：

 class OfferController extends AbstractController
{
   public function createOffer(Request $request) {
 
        $offer = new Offer();
        $form = $this->createForm(OfferType::class, $offer);
        $form->handleRequest($request);

类实体报价：

class Offer
{
    /**
     * @ORMOneToMany(targetEntity="Image", mappedBy="offer", cascade={"persist"})
     */
    private $files;

模板：

<table>
    <tbody>
    <tr>
        <th>Nazwa:</th>
        <td>{{ form_widget(form.name) }}</td>
    </tr>
    <tr>
        <th>Opis:</th>
        <td>{{ form_widget(form.description) }}</td>
    </tr>
    <tr>
        <th>Zdjęcia:</th>
        <td>{{ form_widget(form.files) }}</td>
    </tr>
    <tr>
        <th></th>
        <td>{{ form_widget(form.save) }}</td>
    </tr>
    </tbody>
</table>

---

解决方案

我推荐捆绑包VichUploader

composer require vich/uploader-bundle

# config/services.yaml
parameters:
    app.path.product_images: /uploads/images/products
    # ...

# config/packages/vich_uploader.yaml
vich_uploader:
    # ...
    mappings:
        product_images:
            uri_prefix:         '%app.path.product_images%'
            upload_destination: '%kernel.project_dir%/public%app.path.product_images%'
``