`oneOf` / `anyOf` usage with form-based content-type schema

[jacobjmarks]

Originally posted by @jacobjmarks in #3803 (comment)

I am having a similar issue here. See below an example spec in which I am attempting to describe a form which can accept one of two possible schemas:

openapi: 3.0.1
info:
  title: FooBar
  version: 1.0.0
paths:
  /foobar:
    post:
      summary: Summary
      requestBody:
        content:
          application/x-www-form-urlencoded:
            schema:
              oneOf:
              - type: object
                properties:
                  Foo:
                    type: string
              - type: object
                properties:
                  Bar:
                    type: string
      responses:
        default:
          description: Description

Please note that the same issue occurs when using a requestBody/content type of multipart/form-data

This endpoint should expect to receive a body of either Foo= or Bar=.
This schema causes the following Swagger UI interface to be rendered:

This is not correct. It is representing the form as a JSON payload and causes invalid requests to be sent to the endpoint in which the Swagger UI is encoding each character as a separate form value. E.g. sending a value of hi would result in the body 0=h&1=i.

This same issue occurs when using anyOf.

When using allOf, however, a correct representation is rendered as below:

Are there any updates here regarding the support for such oneOf and anyOf usage? Alternatively; am I incorrectly defining my schema in some way to achieve such usage?

[eduardoj]

Alternatively; am I incorrectly defining my schema in some way to achieve such usage?

Could you try increasing the indentation of the item elements of oneOf?

            schema:
              oneOf:
                - type: object
                  properties:
                    Foo:
                      type: string
                - type: object
                  properties:
                    Bar:
                      type: string

[jacobjmarks]

@eduardoj Increasing the indentation as above does not result in any differences; this using the online Swagger Editor

[sannyjacobsson]

Any update?

[ahmed2m]

Is there any progress on this?
Possibly duplicates: #7462 #7418

[xingyuanmoodys]

I have the same issue using oneOf for form-data, is there any updates for this?

[egobrain]

Any updates here ?

[marceloabrumet]

This could be a great feature

[tfrancois]

Update please? This is a glaring issue that has not been resolved or even responded to.