ef-code-first - Entity Framework 表每个类型继承与鉴别器列

Question

我正在使用 EF5 TPT，因此不期望有鉴别器列。为什么要创建它？

(简化的)表类是；

[Table("SalesDocumentHeaders")]
public abstract class SalesDocumentHeader : LoggedEntity
{
    [ForeignKey("CreatedByUserId")]
    public virtual User CreatedBy { get; set; }

    [Required]
    public int CreatedByUserId { get; set; }

    [Required]
    public virtual DateTime? DocumentDate { get; set; }

    [Required]
    public String ReferenceNumber { get; set; }

  } 

[Table("SalesOrders")]
public class SalesOrder : SalesDocumentHeader
{
    [Required]
    public String CustomerOrderNumber { get; set; }

    public DateTime? DeliverBy { get; set; }

    public virtual SortableBindingList<SalesOrderLine> Lines { get; set; }

}

public abstract class LoggedEntity
{
    public int Id { get; set; }

    public Guid RowId { get; set; }

    [ConcurrencyCheck]
    public int RowVersionId { get; set; }

}

上下文包含

 public DbSet<SalesOrder> SalesOrders { get; set; }

 public DbSet<SalesDocumentHeader> SalesDocumentHeaders { get; set; }

SalesDocumentHeader 表创建了一个 Discriminator 列。我究竟做错了什么？

SalesDocumentHeader 是否声明为抽象没有区别

Answer 1

因为我有另一个从 SalesDocumentHeader 继承的类，我忘记用 table 属性标记