Rails5 Server: How to generate CRUD operations?

Description

Trying to generate RESTFUL CRUD operations that map to Rails 5 defaults. I see in the templates that it has accounted for it but it still generates controllers that only use the operationID field.

If I remove the operationId field then the method name is generated automatically but NOT to the CRUD operation. Is there another field to use? Is there something on generation?

I just assumed that GET /path; GET /path/{:id} would map to the RESTFUL CRUD methods index and show in a rails controller.

Swagger-codegen version

2.2.1

Swagger declaration file content or url

/payments:
    get:
      tags:
        - payment
      summary: List payments
      description: Get a list of payments.
      operationId: list_payments
      parameters:
        - name: page[number]
          in: query
          description: Page number
          required: false
          type: integer
          default: 1
        - name: page[size]
          in: query
          description: Page size
          required: false
          type: integer
          default: 10
          maximum: 50
      responses:
        200:
          description: OK
          schema:
            $ref: '#/definitions/GetPaymentsResponse'
        401:
          description: Unauthorized
          schema:
            $ref: '#/definitions/GetErrorResponse'
        403:
          description: Forbidden
          schema:
            $ref: '#/definitions/GetErrorResponse'
        409:
          description: Invalid Request
          schema:
            $ref: '#/definitions/GetErrorResponse'

Start with the Rails 5 server templates and the generated controller for the supplied /payments operation. Compare how operationId is used with the expected Rails index and show methods, then determine whether a generation option or template change is required; done means the supported behavior and required change are clearly established.