How to make a field in a definition required for some operations and not others

Question

I\'m writing my swagger definition in yaml. Say I have a definition that looks something like this.

paths:
  /payloads:
    post:
      summary: create a pay         


        

Answer 1

I'm in the same problem rigth now. Im my case, I tried to override requerid block of model. But didn't work. =[ Then, I remembered we can add new properties of a $ref. So it works if you define the requeried fields on schema for each method. Some thing like this (Focus on required block for each ref):

swagger: '2.0'
info:
  title: API
  version: 0.0.1
host: api.help.v1
basePath: /help
schemes:
- https
definitions:
  MyModel:
    description: 'Exemplo'
    type: object
    properties:
      field_1:
        type: string
      field_2:
        type: string
      field_3:
        type: string
paths:
  '/helps':
    post:
      description: ''
      summary: ''
      parameters:
        - in: body
          name: payload
          schema:
            type: object
            allOf:
            - $ref: '#/definitions/MyModel'
            required: 
            - field_1
      responses:
        '200':
          description: OK
        '400':
          description: N_OK
    put:
      description: ''
      summary: ''
      parameters:
        - in: body
          name: payload
          schema:
            type: object
            allOf: 
            - $ref: '#/definitions/MyModel'
            required: 
            - field_2
      responses:
        '200':
          description: OK
        '400':
          description: N_OK

externalDocs:
  description: Find out more about Swagger
  url: 'http://swagger.io'

Oh! On swagger editor show that only by model view:

I didn't try yet. But should be possible to define Model like that.