test.yaml

openapi: 3.0.0
info:
  title: Ref test
  version: 0.0.1


paths:
  "/objects":
    post:
      operationId: object_create
      requestBody:
        $ref: "#/components/requestBodies/Object"
      responses:
        "201":
          description: ""
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/Object"


components:
  requestBodies:
    Object:
      content:
        application/json:
          schema:
            $ref: "#/components/schemas/Object"

  schemas:
    Object:
      required:
        - datetime
      type: object
      properties:
        id:
          type: integer
          readOnly: true
        datetime:
          type: string
          format: date-time
        value:
          type: number
          nullable: true
        custom_fields:
          type: string
          readOnly: true