.Net Core 3.1 API 在使用 Asp.NetCore.Odata for REST API 时遇到问题

Question

我想做的主要事情是我希望我的 AspNet.Core 3.1 API 支持 Odata。最主要的是 WebApi 暴露了内部映射到实体对象的 Dto 对象。我已经实施了更改，但不断收到 404 错误。我所做的更改是：

• 安装AspNetCore.OData7.3.

• 对 Startup.cs

添加了更改

public class 启动 { public void ConfigureServices(IServiceCollection 服务) services.AddOData(); services.AddMvc(选项 => options.EnableEndpointRouting = 假);

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
   IEdmModel model = GetEdmModel();
   app.UseMvc(builder =>
   {
            builder.Select().Expand().Filter().OrderBy().MaxTop(100).Count();
            builder.MapODataServiceRoute("odata", "odata", model);
   });

public static IEdmModel GetEdmModel()
    {
        if (_edmModel == null)
        {
            var builder = new ODataConventionModelBuilder();
            builder.EntitySet<CustomerDto>("CustomerDtos");                
            _edmModel = builder.GetEdmModel();
        }
        return _edmModel;
    }

} - 客户控制器更改

public class CustomersController : ControllerBase 
{
    public ICustomerRepository _customers;
    public CustomersController(DbContext context)/
    {
        _customers = new CustomerRepository(context);
    }

    [HttpGet]        
    [EnableQuery]
    public async Task<ActionResult<IEnumerable<CustomerDto>>> Get()
    {
        return Ok((await _customers.GetCustomers()).Select(c=>CustomerDto.MapToCustomerDto(c)));
    }
}

但是这会不断出现 404 错误 odata/customers

Answer 1

如果你使用url/odata/customers，customers指的是一个名为Customers的实体集。控制器名称始终派生自 OData 路径根目录下的实体集。

参考https://docs.microsoft.com/en-us/odata/webapi/built-in-routing-conventions#built-in-routing-conventions-1

解决方案:

一种方法是保留 EntitySet 名称但修改控制器名称

(CustomersController->CustomerDtosController):

public class CustomerDtosController : ControllerBase

Url: /odata/customerDtos

另一种方法是保留控制器名称但修改 EntitySet 名称：

builder.EntitySet<CustomerDto>("Customers");

Url: odata/customers