Unsupported API version with versions within URI — what's wrong?

Question

I have a Web API project using .net core 2.2 (maybe there's the problem.)

The routes are awaiting OAuth authorization with OpenIdDict, but that works totally fine for me. I am trying a very simple approach:

The startup.cs just contains:

services.AddApiVersioning();

The API controller has three different routes for test purposes. Notice that the controller itself has no [Route()] or [ApiVersion()] annotations.

[HttpGet]
[Authorize]
[ApiVersion("2.0")]
[Route("api/v{version:apiVersion}/vt")]
public IActionResult GetVt20()
{
    return Ok("2.0");
}

[HttpGet]
[Authorize]
[ApiVersion("1.0")]
[Route("api/v{version:apiVersion}/vt")]
public IActionResult GetVt10()
{
    return Ok("1.0");
}

If I do an authorized request like

http://localhost:27713/api/v1.0/vt

.net core answers with a BadRequest:

{"error":{"code":"UnsupportedApiVersion","message":"The HTTP resource that matches the request URI 'http://localhost:27713/api/v1.0/vt' does not support the API version '1.0'.","innerError":null}}

What am I missing?

Answer 1

I had the same issue when migrating from 2.1 net core to 2.2 Just add to your controller class [ApiController] Attribute

Github Issue