API ASP.NET 5“POST”成功，但出现错误“没有路由与提供的值匹配”

Posted 2023-04-13

【中文标题】API ASP.NET 5“POST”成功，但出现错误“没有路由与提供的值匹配”

【英文标题】：API ASP.NET 5 "POST" successfully, although with the error "No route matches the supplied values"

【发布时间】：2021-12-08 06:21:03

【问题描述】：

尽管它看起来像一个重复的问题，但 *** 的答案似乎都不适合或解决我的问题。

基本上，我正在使用 ASP.NET 5 制作一个 REST API，其中包含两个实体：“Server”和“Video”，实体“Video”依赖于实体“Server”。

GET、POST、PUT、DELETE...方法都与“服务器”实体一起工作；问题是当我尝试在“视频”实体上使用 POST 时。

System.InvalidOperationException: No route matches the supplied values.
   at Microsoft.AspNetCore.Mvc.CreatedAtActionResult.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]()
--- End of stack trace from previous location ---
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResultExecutedContextSealed context)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.ResultNext[TFilter,TFilterAsync](State& next, Scope& scope, Object& state, Boolean& isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeResultFilters()
--- End of stack trace from previous location ---
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeFilterPipelineAsync>g__Awaited|19_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
   at Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
   at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

有趣的是，即使它返回错误，当我使用 GET 进行检查时，JSON 也会成功发布。

这是一段 VideosController 的代码：

namespace SeventhApi.Controllers

    [Route("api/servers/serverId/videos")]
    [ApiController]
    public class VideosController : ControllerBase
    
        private readonly VideoContext _context;

        public VideosController(VideoContext context)
        
            _context = context;
        

        [HttpGet("id")]
        public async Task<ActionResult<Video>> GetVideo(Guid id)
        
            var video = await _context.Videos.FindAsync(id);

            if (video == null)
            
                return NotFound();
            

            return video;
        

        [HttpPost]
        public async Task<ActionResult<Video>> PostVideo(Video video)
        
            _context.Videos.Add(video);
            await _context.SaveChangesAsync();

            return CreatedAtAction("GetVideo", new  id = video.VideoId , video);
        

还有一大块启动：

        public void ConfigureServices(IServiceCollection services)
        

            services.AddControllers();
            services.AddDbContext<ServerContext>(opt => opt.UseInMemoryDatabase("Server"));
            services.AddDbContext<VideoContext>(opt => opt.UseInMemoryDatabase("Video"));
        

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        
            if (env.IsDevelopment())
            
                app.UseDeveloperExceptionPage();
            

            app.UseHttpsRedirection();

            app.UseRouting();

            app.UseAuthorization();

            app.UseEndpoints(endpoints =>
            
                endpoints.MapControllers();
            );

根据我在这里找到的答案，我倾向于认为这是一些路由错误，但没有一个答案能解决我的问题。

【问题讨论】：

你确定“GetVideo”方法存在吗？更喜欢使用nameof(GetVideo) 路由控制器是：“api/servers/serverId/videos”。你不应该提供 serverId 参数吗？

【参考方案1】：

url有两个参数，serverId id。

return CreatedAtAction("GetVideo", new  id = video.VideoId, serverId = 1 , video);

【参考方案2】：

正如 Hazrelle 所说，这实际上是使用 nameof(GetVideo) 的问题：

    [HttpPost]
    [ActionName(nameof(GetVideo))]
    public async Task<ActionResult<Video>> PostVideo(Video video)
    
        _context.Videos.Add(video);
        await _context.SaveChangesAsync();

        return CreatedAtAction(nameof(GetVideo), new  id = video.VideoId , video);