c# - OData 返回 'Cannot find the services container for route ' odata-Unversioned'

Question

我正在尝试使用 OData 设置新的 .NET Core 3.1 API。

我在 2.2 中有一个可以使用 OData 的 .NET Core API，所以我要放弃那个。

我正在使用三个特定于 OData 的 nuget 包:Microsoft.AspNetCore.OData v7.3.0、Microsoft.AspNetCore.OData.Versioning v4.1.1 和 Microsoft .AspNetCore.OData.Versioning.ApiExplorer v4.1.1。

当我向我的 Controller 发送 GET 请求时，我不断收到以下响应:

System.InvalidOperationException: Cannot find the services container for route 'odata-Unversioned'. This should not happen and represents a bug.
  at Microsoft.AspNet.OData.PerRouteContainerBase.GetODataRootContainer(String routeName)
  at Microsoft.AspNet.OData.Extensions.HttpRequestExtensions.CreateRequestScope(HttpRequest request, String routeName)
  at Microsoft.AspNet.OData.Extensions.HttpRequestExtensions.CreateRequestContainer(HttpRequest request, String routeName)
  at Microsoft.AspNet.OData.Routing.ODataPathRouteConstraint.<>c__DisplayClass0_0.<Match>b__0()
  at Microsoft.AspNet.OData.Routing.ODataPathRouteConstraint.GetODataPath(String oDataPathString, String uriPathString, String queryString, Func`1 requestContainerFactory)
  at Microsoft.AspNet.OData.Routing.ODataPathRouteConstraint.Match(HttpContext httpContext, IRouter route, String routeKey, RouteValueDictionary values, RouteDirection routeDirection)
  at Microsoft.AspNet.OData.Routing.UnversionedODataPathRouteConstraint.Match(HttpContext httpContext, IRouter route, String routeKey, RouteValueDictionary values, RouteDirection routeDirection)
  at Microsoft.AspNetCore.Routing.RouteConstraintMatcher.Match(IDictionary`2 constraints, RouteValueDictionary routeValues, HttpContext httpContext, IRouter route, RouteDirection routeDirection, ILogger logger)
  at Microsoft.AspNetCore.Routing.RouteBase.RouteAsync(RouteContext context)
  at Microsoft.AspNetCore.Routing.RouteCollection.RouteAsync(RouteContext context)
  at Microsoft.AspNetCore.Builder.RouterMiddleware.Invoke(HttpContext httpContext)
  at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
  at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
  at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

请注意，我要求 API 需要进行版本控制。我不确定版本控制是否与此错误有关，但我拥有的旧 .NET Core 2.2 API 也使用 OData 版本控制。有谁知道路线的服务容器是什么？

我设置我的项目类似于 https://devblogs.microsoft.com/odata/experimenting-with-odata-in-asp-net-core-3-1/ .我什至还尝试完全按照博客文章中的设置进行设置，但是如果没有版本控制，我什至无法让 OData 工作。当我尝试删除版本控制时，我一直收到 404 并且它无法到达路线。我的路由设置是否正确？

这是ConfigureServices

public void ConfigureServices(IServiceCollection services)
{
    // Add API versioning
    services.AddApiVersioning(options => options.ReportApiVersions = true);

    // Add OData
    services.AddOData().EnableApiVersioning();
    services.AddODataApiExplorer(options =>
    {
        options.GroupNameFormat = "'v'VVV";
        options.SubstituteApiVersionInUrl = true;
    });

    // Add support for controllers and API-related features
    services.AddControllers(mvcOptions => mvcOptions.EnableEndpointRouting = false);
}

这里是配置

// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    if (env.IsDevelopment())
    {
        app.UseDeveloperExceptionPage();
    }

    app.UseHttpsRedirection();
    app.UseRouting();
    app.UseAuthorization();

    var apiVersion = new ApiVersion(1, 0);
    app.UseMvc(routeBuilder =>
    {
        routeBuilder.Count().Filter().OrderBy().Expand().Select().MaxTop(null);
        app.UseMvc(routes =>
            routes.MapVersionedODataRoute("odata", "api/v{version:apiVersion}", app.GetEdmModel(), apiVersion));
    });
}

这是我在上面使用的扩展方法GetEdmModel()

public static class ODataExtensions
{
    public static IEdmModel GetEdmModel(this IApplicationBuilder app)
    {
        var model = GetEdmModel(app.ApplicationServices);
        return model;
    }

    private static IEdmModel GetEdmModel(IServiceProvider serviceProvider)
    {
        var builder = new ODataConventionModelBuilder(serviceProvider);

        // Entities
        builder.EntityType<Object>().HasKey(x => x.Id);

        // Controllers
        builder.EntitySet<Object>("Object");

        return builder.GetEdmModel();
    }
}

这是 Controller

[Route("odata")]
[ApiVersion("1")] 
public class ObjectsController : ODataController
{
    private readonly ILogicService _logicService;

    public AlternateIdsController(ILogicService logicService)
    {
        _logicService = logicService;
    }

    [HttpGet]
    [EnableQuery]
    public IActionResult Get()
    {
        return Ok(_logicService.Browse());
    }
}

Answer 1

GetEdmModel() 方法中的 Controller 名称与 Controller 类的实际名称相差一个“s”。