duplicated-entry-in-enum

Enums allow API designers to define a pre-set list of values that are acceptable for input, or will be output.

Sometimes, copy-pasta happens and Enums become duplicated.

This rule checks every item is unique, in all enum values.

Why did this violation appear?

A value listed in an enum has been duplicated. Each value needs to be unique.

Bad example

paths:
  /items:
    get:
      parameters:
        - in: query
          name: sort
          description: "Sorting order for items"
          schema:
            type: string
            enum: [asc, desc, asc, asc]
            ...

Good Example

paths:
  /items:
    get:
      parameters:
        - in: query
          name: sort
          description: "Sorting order for items"
          schema:
            type: string
            enum: [asc, desc]
            ...

How do I fix this violation?

Check enum values for duplicated content.

Spectral Equivalent

The rule is equivalent to duplicated-entry-in-enum