Generated interface, contains string instead of enum in case of POST request

[matadini]

Expected Behavior

As a user, I want to generate a POST method declaration for the controller based on the OpenAPI yml file, where the request body is of enum type.

Actual Behaviour

The generated interface contains a variable of type String instead of the expected enum.

Steps To Reproduce

1. Setup standard simple micronaut application with OpenAPI yml file.
2. Declare simple endpoints:

  /api/v1/colors:
    get:
      tags: [ my-custom ]
      operationId: "getSelectedColor"
      responses:
        "200":
          description: "OK"
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Color'
    post:
      tags: [ my-custom ]
      operationId: "selectColor"
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: "#/components/schemas/Color"
      responses:
        "200":
          description: "OK"

3. Enum component declaration:

    Color:
      type: string
      enum:
        - GREEN
        - RED
        - WHITE

4. Generated interface looks like this:

    /**
     * getSelectedColor
     *
     * @return OK (status code 200)
     */
    @Get("/api/v1/colors")
    Color getSelectedColor();

    /**
     * selectColor
     *
     * @param body (required)
     */
    @Post("/api/v1/colors")
    void selectColor(
        @Body @NotNull String body
    );

For the GET method, everything is fine, but for the POST method, the variable is a string. Is it possible to achieve an enum type as a result of the generation? If this is not a bug, please let me know what I am doing wrong.

Environment Information

• OpenSUSE Tumbleweed
• JDK21
• Micronaut 4.7.1
• Micronaut Gradle Plugin: 4.4.4

Example Application

https://github.com/matadini/openapi-micronaut-string-instead-enum

Version

4.7.0