openapi: 3.0.0
info:
  title: test
  version: 0.0.0
paths:
  /report:
    get:
      parameters:
        - in: query
          name: rel_date
          required: true
          schema:
            type: string
            default: today
            enum:
              - today
              - yesterday
              - lastweek
      responses:
        '200':
          description: OK