c# - CreatedAtAction 结果为 "No route matches the supplied values"

Question

关于“No route matches the supplied values”错误的问题有很多，但我还没有在答案中找到任何解决方案:(

这是我的 Controller :

[ApiVersion("0.0")]
[Route("api/v{version:apiVersion}/[controller]")]
[ApiController]
public class WidgetsController : ControllerBase
{
    private readonly IRepository _repository;

    public WidgetsController(IRepository repository)
    {
        _repository = repository;
    }

    [HttpPost]
    [ProducesResponseType(StatusCodes.Status201Created)]
    [ProducesResponseType(StatusCodes.Status400BadRequest)]
    public IActionResult Add([FromBody] AddWidgetRequest request)
    {
        WidgetDetails details;
        try
        {
            details = request.ToWidgetDetails();
        }
        catch (AddWidgetRequest.BadRequest e)
        {
            return BadRequest(e.Message);
        }

        var id = _repository.AddWidget(details);

        return CreatedAtAction(nameof(GetById), new {id = id}, details.WithId(id));
    }

    [HttpGet("{id}")]
    [ProducesResponseType(StatusCodes.Status200OK)]
    [ProducesResponseType(StatusCodes.Status404NotFound)]
    public IActionResult GetById(int id)
    {
        if (_repository.TryGetWidget(id, out var details))
        {
            return Ok(details.WithId(id));
        }
        else
        {
            return NotFound();
        }
    }
}

当 POST 到/api/v0/Widgets 时，新条目被添加到数据库，但返回 HTTP 500，并带有消息“System.InvalidOperationException:没有路由匹配提供的值。”。我的代码与 https://learn.microsoft.com/en-us/aspnet/core/web-api/action-return-types?view=aspnetcore-3.1 中的示例几乎相同，我不知道问题出在哪里。

Answer 1

您需要在 CreatedAtAction 方法中指定 api 版本，如下所示:

public IActionResult Add([FromBody] AddWidgetRequest request,ApiVersion version)
{
    return CreatedAtAction(nameof(GetById), new { id = 1, version = version.ToString() }, details.WithId(id));
}