@jeremyhalin can you dump $file when it's an array, to see what we have?

@jeremyhalin can you dump $file when it's an array, to see what we have?

When I type mixed $picture, I have an empty array.

The more I test, the more I don't see how #[MapUploadedFile] can be used as optional.

Can you create a simple repository on your github, with symfony installed and your use case?

It will be easier for us to test.

The two code examples are all I have to share. If you want to test, you can install Symfony demo and just copy/paste my code.

I'm having a similar problem.

RafinhaApi\Controller\FileController::uploadFile(): Argument #1 ($picture) must be of type Symfony\Component\HttpFoundation\File\UploadedFile, array given

This is the code:

public function uploadFile(
    #[MapUploadedFile(
        [
            new Assert\File(mimeTypes: ['image/png', 'image/jpeg', 'image/webp', 'image/jpg']),
            new Assert\Image(maxWidth: 3840, maxHeight: 2160),
        ],
        'picture',
    )] UploadedFile $picture // <- $picture is an empty array
): JsonResponse {
    return $this->json([]);
}

This is my request:

curl --request PUT \
  --url http://localhost:8000/api/file/ \
  --header 'Content-Type: multipart/form-data' \
  --header 'User-Agent: insomnia/10.0.0' \
  --form picture=@/run/user/1000/doc/f67e3a20/3868846673715350409_n.jpg

To reproduce this issue you can go to my repository
https://codeberg.org/cizordj/rafinha-api

and run the application:

cd public
symfony local:server:start --no-tls

Hello @cizordj

It seems you are having the problem even if you pass the file, which is different from my case when I try to call the route without passing a file with an optional UploadedFile. In my case, passing a file works.

Seems related to #54871

This part of the RequestPayloadValueResolver (line 235)

private function mapUploadedFile(Request $request, ArgumentMetadata $argument, MapUploadedFile $attribute): UploadedFile|array|null
{
    return $request->files->get($attribute->name ?? $argument->getName(), []);
}

assumes that files are present, even though the ArgumentMetaData is right there to check if we have set the parameter as null.

Not sure though if this kind of logic should be implemented here.

On the other hand, the empty array that is given as parameter to $request->files->get() is a default return...

Is MapUploadedFile meant to be used for multiple file-upload? then an empty array is slightly sensible as a default return.
Even better would be adding MapUploadedFiles or sth