OpenAPI / Swagger 3.0： 默认鉴别器值

Question

如何为每个子类设置默认鉴别器？

例如，采用以下架构：

components:
  schemas:
    Pet:
      type: object
      required:
      - petType
      properties:
        petType:
          type: string
      discriminator:
        propertyName: petType
    Cat:
      allOf:
      - $ref: '#/components/schemas/Pet'
      - type: object
        # all other properties specific to a `Cat`
        properties:
          name:
            type: string
    Dog:
      allOf:
      - $ref: '#/components/schemas/Pet'
      - type: object
        # all other properties specific to a `Dog`
        properties:
          bark:
            type: string

上述架构的代码生成器将创建一个客户端，其中 petType 值必须由程序员显式设置。为什么默认情况下不能将 Cat 对象将 petType 设置为“猫”？

我尝试使用默认值来使其正常工作。但是，生成的代码包括阴影属性（子属性和父属性相同）。

components:
  schemas:
    Pet:
      type: object
      required:
      - petType
      properties:
        petType:
          type: string
      discriminator:
        propertyName: petType
    Cat:
      allOf:
      - $ref: '#/components/schemas/Pet'
      - type: object
        # all other properties specific to a `Cat`
        properties:
          name:
            type: string
          petType:
            type: string
            default: 'Cat'
    Dog:
      allOf:
      - $ref: '#/components/schemas/Pet'
      - type: object
        # all other properties specific to a `Dog`
        properties:
          bark:
            type: string
          petType:
            type: string
            default: 'Dog'

从父对象中删除属性< code>petType也不太合适，因为从技术上讲，它更像是父对象的属性，而不是子对象的属性。

components:
  schemas:
    Pet:
      type: object
      required:
      - petType
      discriminator:
        propertyName: petType
    Cat:
      allOf:
      - $ref: '#/components/schemas/Pet'
      - type: object
        # all other properties specific to a `Cat`
        properties:
          name:
            type: string
          petType:
            type: string
            default: 'Cat'
    Dog:
      allOf:
      - $ref: '#/components/schemas/Pet'
      - type: object
        # all other properties specific to a `Dog`
        properties:
          bark:
            type: string
          petType:
            type: string
            default: 'Dog'

你对这个问题有什么解决办法吗？

Answer 1

一旦指定了映射，默认值就可能是隐式????

discriminator:
        propertyName: petType
        mapping:
          dog: Dog
          cat: Cat