CreatedAtRoute 生成一个异常：“没有路由与提供的值匹配。”

Question

使用我的 Post 函数在表中创建行会生成 500 响应并写入数据。 响应正文是一个html，错误似乎如下：

<h1>An unhandled exception occurred while processing the request.</h1>
            <div class="titleerror">InvalidOperationException: No route matches the supplied values.</div>
                <p class="location">Microsoft.AspNetCore.Mvc.CreatedAtRouteResult.OnFormatting(ActionContext context)</p>

显然，我的错误发生在我的CreatedAtRoute 响应中。

我很难准确理解帖子的作用以及应该如何为表格中的新条目生成链接。

我正在使用 swagger 来调用我的端点。

我尝试阅读有关如何生成链接的信息，但这些概念淹没了我。 我尝试弄乱CreatedAtRoute 响应，但我似乎无法弄清楚我需要发送的正确参数，或者它到底做了什么。

控制器：

[ProducesResponseType(typeof(Location),200)]
        [HttpGet("locations/{locationId}", Name = "LocationById")]
        public IActionResult GetLocation(int locationId)

[HttpPost("locations")]
        public IActionResult CreateLocation([FromBody] CreateLocationRequest createLocationRequest)
        {
            try
            {
                if (createLocationRequest == null)
                {
                    return NotFound();
                }

                return CreatedAtRoute("LocationById",_repository.Location.CreateLocation(createLocationRequest),createLocationRequest);
            }
            catch (Exception e)
            {
                return StatusCode(500, e.InnerException);
            }
        }

存储库：

public int CreateCompany(string name, int countryId, int? parentId)//string name, int countryId, int? parentId
        {
            Company company = new Company()
            {
                CountryId = countryId,
                Name = name,
                ParentId = parentId
            };
            _context.Companies.Add(company);
            _context.SaveChanges();
            return company.Id;
        }

启动路由配置：

app.UseHttpsRedirection();
            app.UseMvc(routes =>
            {
                routes.MapRoute(
                    name: "default",
                    template: "{controller=Home}/{action=Index}/{id?}");
            });

我需要一条通往我新创建的表格条目的正确路线。任何有关如何获得此文件的建议将不胜感激。

在阅读了一些关于 CreatedAtRoute 的内容后，我尝试调整我的函数以尝试查看在调用 CreatedAtRoute 时传递实体本身而不是模型是否会对我的事业有所帮助。它没有。

新方法： 存储库：

public LocationReturns CreateLocation(CreateLocationRequest createLocationRequest)
        {
            if (_context.Companies.FirstOrDefault(c => c.Id == createLocationRequest.CompanyId) != null)
            {
                LocationReturns locationReturns=new LocationReturns();
                Location location = new Location()
                {
                    Address = createLocationRequest.Address,
                    AllowedAsSource = createLocationRequest.AllowedAsSource,
                    City = createLocationRequest.City,
                    CompanyId = createLocationRequest.CompanyId,
                    Name = createLocationRequest.Name,
                    Picture = createLocationRequest.Picture,
                    PostCode = createLocationRequest.Postcode,
                    Region = createLocationRequest.Region
                };
                _context.Locations.Add(location);
                _context.SaveChanges();
                locationReturns.id = location.Id;
                locationReturns.loc = location;
                return locationReturns;
            }
            LocationReturns loc = new LocationReturns();
            return loc;
        }

控制器：

[HttpPost("locations")]
        public IActionResult CreateLocation([FromBody] CreateLocationRequest createLocationRequest)
        {
            try
            {
                if (createLocationRequest == null)
                {
                    return NotFound();
                }
                LocationRepository.LocationReturns locationReturns=new LocationRepository.LocationReturns();
                locationReturns = _repository.Location.CreateLocation(createLocationRequest);

                return CreatedAtRoute("DefaultApi",new {id=locationReturns.id}, locationReturns.loc);
            }
            catch (Exception e)
            {
                return StatusCode(500, e.InnerException);
            }
        }

LocationReturns 是一个结构体。

Answer 1

CreateAtRoute() 中生成的匿名对象必须有一个与路由中声明的参数同名的 int 属性。前任： [HttpGet("/locations/{locationId}, Name="LocationCreated" 需要 CreatedAtRoute("LocationCreated", new {locationId=id}, locationObject); 而不是CreatedAtRoute("LocationCreated", new {id=_id}, locationObject);