swagger-core

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I'm using 2.2.28. I have the following classes:

    class Question {
        @ArraySchema(schema = @Schema(description = "The answer to the question"))
        public Set<Option> answer;
    }

    enum Option {
        A, B, C, D
    }

The OpenAPI 3 schema looks like this:

Question:
type: object
properties:
  answer:
    uniqueItems: true
    type: array
    items:
      type: string
      description: The answer to the question
      enum:
      - A
      - B
      - C
      - D

When I switch to OpenAPI 3.1, I get:

Question:
type: object
properties:
  answer:
    type: array
    items:
      description: The answer to the question
    uniqueItems: true

I can work around this by adding implementation = Option.class to the inner @Schema annotation, e.g. @ArraySchema(schema = @Schema(description = "The answer to the question", implementation = Option.class)).