reuse openapi params 3.0

openapi.yml

openapi: 3.0.0
info:
  title: Thing API
  version: 1.0.0
  description: An API to create and update Thing objects using JSON:API specification

paths:
  /things:
    post:
      summary: Create a new Thing
      requestBody:
        required: true
        content:
          application/vnd.api+json:  # JSON:API media type
            schema:
              $ref: '#/components/schemas/ThingCreate'
      responses:
        '201':
          description: Thing created successfully
          content:
            application/vnd.api+json:
              schema:
                $ref: '#/components/schemas/ThingResponse'
        '400':
          description: Bad request

  /things/{id}:
    put:
      summary: Update an existing Thing
      parameters:
        - name: id
          in: path
          required: true
          schema:
            type: integer
      requestBody:
        required: true
        content:
          application/vnd.api+json:
            schema:
              $ref: '#/components/schemas/ThingUpdate'
      responses:
        '200':
          description: Thing updated successfully
          content:
            application/vnd.api+json:
              schema:
                $ref: '#/components/schemas/ThingResponse'
        '400':
          description: Bad request
        '404':
          description: Thing not found

components:
  schemas:
    Thing:
      type: object
      properties:
        id:
          type: integer
        type:
          type: string
          enum: [thing]  # JSON:API requires a type identifier
        attributes:
          type: object
          properties:
            prop1:
              type: string
            prop2:
              type: string
            prop3:
              type: string
      required:
        - id
        - type
      additionalProperties: false

    ThingCreate:
      allOf:
        - $ref: '#/components/schemas/Thing'
      required:
        - attributes
      properties:
        attributes:
          type: object
          required:
            - prop1
            - prop2
            - prop3
          properties:
            prop1:
              type: string
            prop2:
              type: string
            prop3:
              type: string

    ThingUpdate:
      allOf:
        - $ref: '#/components/schemas/Thing'
      properties:
        attributes:
          type: object
          properties:
            prop1:
              type: string
            prop2:
              type: string
            prop3:
              type: string
      minProperties: 2  # Requires at least two properties, such as id and one attribute for update

    ThingResponse:
      type: object
      properties:
        data:
          type: object
          properties:
            id:
              type: integer
            type:
              type: string
              enum: [thing]
            attributes:
              type: object
              properties:
                prop1:
                  type: string
                prop2:
                  type: string
                prop3:
                  type: string
      required:
        - data