I have the following issue. Whenever I send something to my Api endpoint, ASP.NET Core 3.1 is not able to process the request. However, when I add the ApiController attribute it works perfectly fine.

My code is correct but only works when I add this attribute. How is that so?

For reference, here's my code

API

[ApiController] //Remove this and the code breaks

[Route(api/SomeApi)]

public class ApiController : Controller {



    private readonly IService service;



    public ApiController(IService service)

    {

        this.service = service;

    }



    [HttpPost]

    [Route(Add)]

    public SomeClass Add(SomeClass foo)

    {

        var userId = service.GetCurrentUserId(User);

        foo.Id = Guid.NewGuid();

        foo.UserId = userId;

        service.Add(foo);

        return foo;

    }

}

JS

axios.post('/api/SomeApi/Add', {

   foo: this.foo,



}).then(function (response: any) {

   this.Id = response.Id;

});

FYI, I have other methods on my ApiController using GET/POST. The GET ones work perfectly fine but the POST methods only work when I use query parameters. In this case, I didn't use query parameters because I have more data to send to my Api than actually given in the example.

I've already tried to get my response using [FromBody]. It did not work. I instead got null. foo was not even instantiated.