c# - 如何使用方法 CreatedAtRoute() 响应发布请求

Question

我在使用以下代码时遇到问题，现在我明白问题出在哪里了，但我没有解决方案来让代码执行我想要的操作。

// POST: api/Airports
    [HttpPost]
    public async Task<ActionResult<Airport>> CreateAirport(AirportCreateDto airportCreateDto)
    {
        var airportModel = _mapper.Map<Airport>(airportCreateDto);
        _repository.CreateAirport(airportModel);
        await _repository.SaveChanges();

        var airportReadDto = _mapper.Map<AirportReadDto>(airportModel);

        return CreatedAtRoute(nameof(GetAirport), new { airportReadDto.ID }, airportReadDto);
    }

CreatedAtRoute() 方法是问题所在。现在，GetAirport 是 Task 类型，这可能是问题的原因。

这里是错误

System.InvalidOperationException: No route matches the supplied values.
 at Microsoft.AspNetCore.Mvc.CreatedAtRouteResult.OnFormatting(ActionContext context)
 at Microsoft.AspNetCore.Mvc.Infrastructure.ObjectResultExecutor.ExecuteAsyncCore(ActionContext 
 context, ObjectResult result, Type objectType, Object value)
at Microsoft.AspNetCore.Mvc.Infrastructure.ObjectResultExecutor.ExecuteAsync(ActionContext context, 
ObjectResult result)
at Microsoft.AspNetCore.Mvc.ObjectResult.ExecuteResultAsync(ActionContext context)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeResultAsync(IActionResult result)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.ResultNext[TFilter,TFilterAsync](State& 
next, Scope& scope, Object& state, Boolean& isCompleted)
at 
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeNextResultFilterAsync[TFilter,
TFilterAsync 
]()

是否有一种解决方案可以让我继续使用类型为 Task 的 CreatedAtRoute() 和 GetAirport？

这是获取机场的代码

// GET: api/Airports/5
    [HttpGet("{id}")]
    public async Task<ActionResult<Airport>> GetAirport(int id)
    {
        var airport = await _repository.GetAirportById(id);

        if (airport == null)
        {
            return NotFound();
        }

        return Ok(_mapper.Map<AirportReadDto>(airport.Value));
    }

Answer 1

System.InvalidOperationException: No route matches the supplied values.

您可以尝试如下显式设置路由名称，这对我有用。

[HttpGet("{id}", Name = "GetAirport")]
public async Task<ActionResult> GetAirport()
{
    //...

Action 方法CreateAirport

[HttpPost]
public async Task<ActionResult<Airport>> CreateAirport(AirportCreateDto airportCreateDto)
{
    //...

    return CreatedAtRoute(nameof(GetAirport), new { id = airportReadDto.ID }, airportReadDto);
}

测试结果