Types missing for parameters with duplicate names but different locations

[JohannCooper]

Description

If an operation contains two parameters with the same name but different locations (in), types will only be generated for one of the parameters. According the OpenAPI Specification v3.0.3, "a unique parameter is defined by a combination of a name and location" (source).

Name	Version
openapi-typescript	6.7.3
Node.js	18.16.1
OS + version	Ubuntu 23.10

Reproduction

Using the schema below, you will see that a parameter type is only generated for the parameter with in: path.

openapi: 3.1.0
info:
  title: Sample API
  version: 0.1.9
  license:
    {
      "name": "Sample License",
      "identifier": "Sample-License",
      "url": "https://license.foobar.com",
    }
servers:
  - url: http://api.foobar.com/v1
paths:
  /users/{userId}:
    get:
      security:
        - {}
      operationId: retrieveUser
      summary: Returns a user by ID.
      parameters:
        - name: userId
          in: query
          required: true
          description: The ID of the user to return.
          schema:
            type: integer
            format: int64
            minimum: 1
        - name: userId
          in: path
          required: true
          description: The ID of the user to return.
          schema:
            type: integer
            format: int64
            minimum: 1
      responses:
        "200":
          description: A user object.
          content:
            application/json:
              schema:
                type: object
                properties:
                  id:
                    type: integer
                    format: int64
                    example: 4
                  name:
                    type: string
                    example: Jessica Smith
        "400":
          description: The specified user ID is invalid (not a number).
        "404":
          description: A user with the specified ID was not found.
        default:
          description: Unexpected error

Expected result

A type is generated for BOTH parameters, despite their non-unique names.

Checklist

• My OpenAPI schema passes the Redocly validator (npx @redocly/cli@latest lint)
• I’m willing to open a PR (see CONTRIBUTING.md)

[drwpow]

Fixed and released in 6.7.4!