在ASP.NET Core的OData中,可以通过以下步骤实现从复杂类型到实体类型的导航:
public class Order
{
public int Id { get; set; }
public string OrderNumber { get; set; }
public Address ShippingAddress { get; set; }
}
public class Address
{
public string Street { get; set; }
public string City { get; set; }
public string State { get; set; }
public string ZipCode { get; set; }
}
ODataRoute
属性指定路由模板,并使用Expand
方法来加载导航属性的数据。[ODataRoutePrefix("Orders")]
public class OrdersController : ODataController
{
private readonly YourDbContext _context;
public OrdersController(YourDbContext context)
{
_context = context;
}
[HttpGet]
[EnableQuery]
[ODataRoute]
public IActionResult Get()
{
return Ok(_context.Orders);
}
[HttpGet]
[EnableQuery]
[ODataRoute("({id})")]
public IActionResult Get(int id)
{
var order = _context.Orders.FirstOrDefault(o => o.Id == id);
if (order == null)
{
return NotFound();
}
return Ok(order);
}
[HttpGet]
[EnableQuery]
[ODataRoute("({id})/ShippingAddress")]
public IActionResult GetShippingAddress(int id)
{
var order = _context.Orders.FirstOrDefault(o => o.Id == id);
if (order == null)
{
return NotFound();
}
return Ok(order.ShippingAddress);
}
}
GET /Orders(1)?$expand=ShippingAddress
这将返回一个包含订单和运送地址的JSON对象。
总结起来,通过在数据模型中定义导航属性,并在OData控制器中配置导航属性的路由,你可以在ASP.NET Core的OData中实现从复杂类型到实体类型的导航。
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