首選CTP中的MapHierarchy（）的替代方法5

Question

如何在新的CTP中設置以下內容？

modelBuilder.Entity<RequestBase>() 
       .MapHierarchy() 
       .Case<RequestBase>(b => new { b.Id, b.Comment, Discriminator = 0 }) 
       .Case<Request1>(s => new { request1_Id = Column.Id, Discriminator = 1 }) 
       .Case<Request2>(m => new { request2_Id = Mission.Id, m.Comment, m.Date, Discriminator = 2 }) 
       .ToTable("dbo.Requests"); 

Answer 1

像這樣將工作：

modelBuilder.Entity<RequestBase>() 
      .Map<RequestBase>(r => r.Requires("Discriminator").HasValue(0)) 
      .Map<Request1>(r1 => r1.Requires("Discriminator").HasValue(1)) 
      .Map<Request2>(r2 => r2.Requires("Discriminator").HasValue(2)) 
      .ToTable("dbo.Requests");