Variability in Swagger parameter declaration

Is it possible to specify input parameters in Swagger with multiple types?

For example: Consider an API that addresses resources using the URL http://localhost/tasks/{taskId}. However, each task contains both an integer ID and a string UUID. I would like to enable users to address the resource using either the ID or the UUID - making both http://localhost/tasks/123 and 

http://localhost/tasks/51f12dbc-02e7-41a6-ab81-2381caea0176
URLs valid.

According to the Swagger documentation (https://github.com/swagger-api/swagger-spec/blob/master/versions/2.0.md#parameter-object), a parameter object can only have a single type

Type: Required. The parameter's type. Since the parameter is not located in the request body, it is limited to simple types (not objects). The value must be one of "string", "number", "integer", "boolean", "array" or "file".

So how can I define the input path parameter as both a string and an integer?

javascriptnode.jsapiswagger

Answer №1

It is not possible to specify a parameter that belongs to multiple types in the Swagger specification.

In this scenario, consider using a string data type as a workaround. This way, you can represent both strings (e.g. "51f12dbc-02e7-41a6-ab81-2381caea0176") and integers (e.g. "123") in the path parameter, allowing the server to handle the data correctly.

Answer №2

Utilizing the power of OpenAPI 3.0, achieving this is made possible through the use of oneOf:

openapi: 3.0.0
...
paths:
  /tasks/{taskId}:
    parameters:
      - in: path
        name: taskId
        required: true
        schema:
          oneOf:
            - type: integer
              example: 123
            - type: string
              format: uuid
              example: 51f12dbc-02e7-41a6-ab81-2381caea0176

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