How to solve the "oneOf constraint failed"?

[YamazakiYasuhiro]

I'm now trying to use OpenAPI v3.1 and analyze the yaml to generate code in golang. First of all, I modified the example at https://github.com/swaggest/rest/blob/master/_examples/gingonic/main.go to OpenAPI v3.1 and generate a yaml file. After that, I created a sample code "main.go" to load the file and unmarshal to golang objects.
However, it fails with an error message "oneOf constraint failed for ResponseOrReference with 2 valid results: map[]".
Could you give me some advice to fix this issue?

Playground: https://go.dev/play/p/7NI2YKoZjBQ

Thank you.

package main

import (
	"log"
	"os"

	"github.com/swaggest/openapi-go/openapi31"
)

func main() {
	bytes, err := os.ReadFile("openapi.yaml")
	if err != nil {
		panic(err)
	}
	log.Println("Read OpenAPI spec:", string(bytes))

	refl := openapi31.NewReflector()
	err = refl.Spec.UnmarshalYAML(bytes)
	if err != nil {
		log.Println("Failed to unmarshal OpenAPI spec:", err)
	} else {
		log.Println("Unmarshaled OpenAPI spec:", refl.Spec)
	}
}

openapi: 3.1.0
info:
  description: This services keeps track of albums.
  title: Albums API
  version: v1.2.3
paths:
  /albums:
    get:
      responses:
        "200":
          content:
            application/json:
              schema:
                items:
                  $ref: '#/components/schemas/Album'
                type: array
          description: OK
      summary: List albums
      tags:
      - Albums
    post:
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/Album'
      responses:
        "200":
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Album'
          description: OK
      summary: Create an album
      tags:
      - Albums
  /albums/{id}:
    get:
      parameters:
      - in: path
        name: id
        required: true
        schema:
          type: string
      responses:
        "200":
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Album'
          description: OK
        "404":
          content:
            application/json:
              schema:
                properties:
                  message:
                    type: string
                type: object
          description: Not Found
      summary: Get album
      tags:
      - Albums
components:
  schemas:
    Album:
      properties:
        artist:
          type: string
        id:
          type: string
        price:
          type: number
        title:
          type: string
      type: object

[vearutop]

Hi, thank you for reporting this! This is definitely a bug, that should be fixed with new v0.2.39. Please give it a try.

[YamazakiYasuhiro]

Thank you for your quick reply!
I've already used v0.2.39, but reproduced it.

go 1.21.1

require (
...(snip)...
        github.com/swaggest/openapi-go v0.2.39
...(snip)...

and currently I have another workaround that using openapi3.NewReflector() instead of openapi31.NewReflector()

[vearutop]

Oh, sorry, my bad, I fixed the issue but actually did not tag a new version. 🤦
https://go.dev/play/p/_90QGRcabbe v0.2.40 passes in playground.

[YamazakiYasuhiro]

Thank you very much!