can't handle upload multiple files？

[sdegongzuo]

Summary

I want to upload multiple files I use the following handle:

async fn handle_upload(raw_image_array: &mut Vec<Multipart>)

The following error occurred:

the trait `Handler<_, _>` is not implemented for fn item `for<'a> fn(&'a mut Vec<Multipart>) -> impl Future<Output = Json<ImageData>> {convert_image}`
    |                          |
    |                          required by a bound introduced by this call

How to upload multiple files?

axum version

0.7.4

[sdegongzuo]

I solved it by giving each file a field