multipart formdata issue with spec

[Wim-De-Clercq]

A schema which contains a path with the following can not be validated with openapi-core.
This relates to #231

      summary: multipart test
      requestBody:
        content:
          multipart/form-data:
            schema:
              type: object  # ---This is the issue. 
              properties:
                file:
                  type: string
                  format: binary
                name:
                  type: string

It can be resolved by not using type: object on the commented line. But https://swagger.io/docs/specification/describing-request-body/multipart-requests/ and https://swagger.io/docs/specification/describing-request-body/file-upload/ both give examples of schemas with it.

While it's not a huge deal to workaround, I feel like the library should be able to handle this.

Edit: It seems that without the object type, the validation just does not work. (I tried using an enum in the properties, and they are not validated).

I do see https://github.com/p1c2u/openapi-core/blob/b51d8104ac1fee1d99ff4a51caedf138e50ccb27/openapi_core/deserializing/media_types/factories.py#L8-L12

Does that mean there is only json support at the moment?

---

As a sidenote, the resulting "body" from validating formdata is quite raw (just a bytestring), I wonder if this could return something that's parsed a little bit more, but I do realise that multipart formdata is not the easiest thing.

[p1c2u]

Hi @Wim-De-Clercq ,

Does that mean there is only json support at the moment?

that's correct, however you can add your custom deserializers . Check customization section for more information.

[wdembinski]

@p1c2u
Can you please provide an example how to register a custom deserializer? I'm working on version 0.16.6 and struggle to upload png image :(

[p1c2u]

Hi @wdembinski

please report a separate bug and provide as much information as possible, thanks