oas2-discriminator

The discriminator as part of the Schema Object adds support for polymorphism. It is the property used to differentiate between other schema that inherit from it.

disciminator must be defined at this schema, and it must be in the required property list. When used, the value must be the name of this schema or any schema that inherits it.

Why did this violation appear?

A discriminator was used incorrectly, or it could be missing a required mapping.

Bad Example

swagger: 2.0
paths:
  /melody:
    post:
      tags: 
        - little
        - song
definitions:
  Song:
    discriminator: "love"
    type: object
    required: 
      - "cuddles"

Good Example

swagger: 2.0
paths:
  /melody:
    post:
      tags:
        - little
        - song
definitions:
  Song:
    discriminator: "love"
    type: object
    required:
      - "love"

How do I fix this violation?

Check discriminator values for correct use and that there is a matching required property.

Spectral Equivalent

The rule is equivalent to oas2-discriminator