TSOA @UploadedFile won't accept file

Question

I have an endpoint defined to accept a multipart/form-data file like so:

@Post('/...')
@SuccessResponse(202, 'Accepted')
@Response(400, 'Bad request')
@Response(404, 'Not found')
public async acceptFile(
    @UploadedFile('file') file: Express.Multer.File
): Promise<...> {
    return this.fileService.acceptFile(file);
}

When I send a multipart/form-data request with a file parameter, TSOA does not accept this request, claiming that "'file' is required". Even though I provided it:

As you can see the request is created by Postman, is correct and has the file form data parameter. According to TSOA file upload documentation this should work.

Answer 1

I was unable to solve this and so implemented a workaround:

First added multer middleware to handle form-data files:

const multerAny = multer({
      storage: multer.diskStorage()
    }).any();
app.use(multerAny);

Then I used raw express request that TSOA can also inject and got the file from that:

@Post('/...')
@SuccessResponse(202, 'Accepted')
@Response(400, 'Bad request')
@Response(404, 'Not found')
public async acceptFile(
    @Request() request: Express.Request
): Promise<...> {
    //request.files will have file array, check if it has elements
    return this.fileService.acceptFile(request.files[0]);
}