Generated examples don't include all attributes when an allOf also contains an anyOf/oneOf

[gwerbin]

Q&A (please complete the following information)

• OS: macOS
• Browser: Chrome
• Version: 88
• Method of installation: N/A
• Swagger-UI version: Using https://editor.swagger.io
• Swagger/OpenAPI version: OpenAPI 3.0.3

Content & configuration

Example Swagger/OpenAPI definition:

openapi: 3.0.3
info:
  title: 'Things n stuff'
  version: 1.0.0

paths:
  '/data':
    get:
      responses:
        '200':
          description: 'The things you asked for.'
          content:
            application/json:
              schema:
                allOf:
                  - $ref: '#/components/schemas/PageInfo'
                  - type: object
                    required:
                      - items
                    properties:
                      items:
                        type: array
                        items:
                          allOf:
                            - anyOf:
                              - $ref: '#/components/schemas/Thing1'
                              - $ref: '#/components/schemas/Thing2'
                            - type: object
                              required:
                                - isImportant
                              properties:
                                isImportant:
                                  type: boolean

components:
  schemas:
    BaseThing:
      type: object
      required:
        - color
      properties:
        color:
          type: string

    Thing1:
      allOf:
        - $ref: '#/components/schemas/BaseThing'
        - type: object
          properties:
            color:
              type: string
              enum:
                - blue
                - red

    Thing2:
      allOf:
        - $ref: '#/components/schemas/BaseThing'
        - type: object
          properties:
            color:
              type: string
              enum:
                - green
                - yellow

    PageInfo:
      type: object
      properties:
        pageNumber:
          type: number
          minimum: 0
        totalPages:
          type: number
          minimum: 0

Describe the bug you're encountering

The isImportant property is not added to the generated example. See the "screenshots" section.

The schema itself appears to be correct in the generated UI.

To reproduce...

Copy and paste the schema above into https://editor.swagger.io/.

Expected behavior

I expected the generated example in the screenshot to include isImportant.

Screenshots

Additional context or thoughts

Thank you for the useful tool!

[mathis-m]

@gwerbin Thank you for reporting this. Perfect minimal reproduction yaml, I could find the issue instantly, very appreciated. Fix provided with #7041.

[gwerbin]

I actually forgot to upload the screenshot of the problematic generated example, but glad you were able to find it easily nonetheless!