OpenAPI analyzers for Problem Details

[sliekens]

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Is your feature request related to a problem? Please describe the problem.

Hello, I enabled the OpenAPI analyzers for my web API and it reports undocumented status codes when I use BadRequest().

using System.ComponentModel.DataAnnotations;
using Microsoft.AspNetCore.Mvc;

[ApiController]
[Route("things")]
public class ThingsController : ControllerBase
{
    [HttpPost("number-guess")]
    [ProducesResponseType(200)]
    public ActionResult<string> GuessNumber([Required] int number)
    {
        if (number != 4)
        {
            return BadRequest("that was not my number");
//          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Action method returns undeclared status code '400'.
        }

        return Ok("you guessed my number");
    }
}

Now I want to use standardized Problem Details responses in my API. However, the analyzers don't show a warning for the same action if I use ValidationProblem() or Problem().

Describe the solution you'd like

Add OpenAPI analyzers for Problem Details shorthand methods.

return ValidationProblem(title: "that was not my number";

return Problem(title: "that was not my number", statusCode: 400);

Additional context

No response

[pranavkm]

@captainsafia is this a dupe of #6061?

[captainsafia]

Yep! @StevenLiekens We resolved this issue in 7.0-preview1. You can try the nightly release via https://github.com/dotnet/installer or wait until the official release drops.