EF 4.1 POCO 中递归加载中的 stackoverflow

Question

我有一个包含 Vehicle 和 VehicleOwner 的 EF 4.1 POCO 类。

当我加载急切加载包含车辆的VehicleOwner时，车辆仍然加载VehicleOwner，当您使用Mapper时，它最终会出现stackoverflow异常。

这是代码示例

public class VehicleOwner : IVehicleOwner
    {

    [Key,DatabaseGenerated(DatabaseGeneratedOption.Identity),ScaffoldColumn(false)]
    public int VehicleOwnerId { get; set; }
    [Required,DisplayName("First Name")]
    public string FirstName{ get; set; }
    [Required,DisplayName("Last Name")]
    public string LastName { get; set; }

    public virtual ICollection<Vehicle> Vehicles { get; set; }

}

public class Vehicle
{
    public Vehicle()
    {
        this.RecoveredVehicles = new HashSet<RecoveredVehicles>();
    }

    [Key,DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public int VehicleId { get; set; }
    [DisplayName("Identification Number")]
    public string IdentificationNumber { get; set; }
    [Required]
    [DisplayName("Owner ID")]
    public int VehicleOwnerId { get; set; }
    [Required]
    [ScaffoldColumn(false)]
    public byte[] RowVersion { get; set; }


    public virtual VehicleOwner VehicleOwner { get; set; }
    public virtual ICollection<RecoveredVehicle> RecoveredVehicles { get; set; }
}

//当我这样做时，车辆会被填充，当您展开车辆时，VehicleOwner 会再次被填充。

public VehicleOwner GetVehicleOwner(int vehicleOwnerID)
{
   objDataContext.Configuration.ProxyCreationEnabled = false;
   return (from p in objDataContext.VehicleOwners.Include("Vehicles") where p.VehicleOwnerId == vehicleOwnerID select p).FirstOrDefault<VehicleOwner>();        
}

有没有办法可以防止这种递归循环。

谢谢

Answer 1

不存在递归循环。 Vehicle 指向原始的VehicleOwner。它只是反向引用，无法避免（仅当您删除反向引用导航属性时）。