正如这篇文章中提到的，我在序列化实体框架代理时遇到 Json 序列化错误：
序列化“System.Data.Entity.DynamicProxies.PurchaseOrder_446B939192F161CDBC740067F174F7A6059B0F9C0EEE68CD3EBBD63CF9AF5BD0”类型的对象时检测到循环引用。
但不同的是，我的实体中没有循环引用，它只发生在我们的生产环境中。本地一切正常...
我的实体：
public interface IEntity
{
Guid UniqueId { get; }
int Id { get; }
}
public class Entity : IEntity
{
public int Id { get; set; }
public Guid UniqueId { get; set; }
}
public class PurchaseOrder : Entity
{
public string Username { get; set; }
public string Company { get; set; }
public string SupplierId { get; set; }
public string SupplierName { get; set; }
public virtual ICollection<PurchaseOrderLine> Lines { get; set; }
}
public class PurchaseOrderLine : Entity
{
public string Code { get; set; }
public string Name { get; set; }
public decimal Quantity { get; set; }
}
我的 PurchaseOrderController 上的 GetCurrent 操作引发异常：
public class PurchaseOrderController : Controller
{
private readonly IUnitOfWork _unitOfWork;
public PurchaseOrderController(IUnitOfWork unitOfWork)
{
_unitOfWork = unitOfWork;
}
public JsonResult GetCurrent()
{
return Json(EnsurePurchaseOrder(), JsonRequestBehavior.AllowGet);
}
private PurchaseOrder EnsurePurchaseOrder()
{
var company = RouteData.GetRequiredString("company");
var repository = _unitOfWork.GetRepository<PurchaseOrder>();
var purchaseOrder = repository
.Include(p => p.Lines)
.FirstOrDefault
(
p => p.Company == company &&
p.Username == User.Identity.Name
);
if (purchaseOrder == null)
{
purchaseOrder = repository.Create();
purchaseOrder.UniqueId = Guid.NewGuid();
purchaseOrder.Company = company;
purchaseOrder.Username = User.Identity.Name;
_unitOfWork.SaveChanges();
}
return purchaseOrder;
}
}
