如何更新實體框架中的鏈接表

Question

我使用EF代碼第一種方法，有一個領域模型類爲：

public class WindmillUser 
     { 
      public WindmillUser() 
      { 
      AssignedMsos = new Collection<Mso>(); 
      RepackerHeaders = new Collection<RepackerHeader>(); 
     } 
     public int WindmillUserId {get;set;} 
     public string Username { get; set; } 
     public RoleType Role { get; set; } 
     public string Email { get; set; } 
     public bool Active { get; set; } 
     public DateTime? LastInteraction { get; set; } 
     public string TelephoneNumber { get; set; } 
     public virtual ICollection<Mso> AssignedMsos { get; set; } 
     public virtual ICollection<RepackerHeader> RepackerHeaders { get; set; } 
     public virtual ICollection<WindmillUser> WindmillUserImpersonateParent { get; set; } 
     public virtual ICollection<WindmillUser> WindmillUsersImpersonateChild { get; set; } 
    } 
} 

我在DataContext類以下配置：

modelBuilder.Entity<WindmillUser>().HasMany(entity => entity.WindmillUsersImpersonateChild).WithMany(child => child.WindmillUserImpersonateParent) 
       .Map(map => 
        { 
         map.ToTable("WindmilUserImpersonate"); 
         map.MapLeftKey("WindmillUserImpersonateParentId"); 
         map.MapRightKey("WindmillUsersImpersonateChildId"); 
        }); 

這將在數據庫中創建一個表WindmillUserImpersonate，該數據庫存儲WindmillUser表與其自身的多對多關係。

我想在WindmillUserImpersonate表中插入記錄。我是否需要爲WindmillUserImpersonate創建一個域模型來執行操作，如果是，那麼以下域是否正確？

public class WindmillUserImpersonate 
    { 
     public int WindmillUserImpersonateParentId { get; set; } 
     public int WindmillUsersImpersonateChildId { get; set; } 
     public virtual WindmillUser WindmillUser { get; set; } 
    } 

如果沒有必要創建一個WindmillUserImpersonate類，那麼我怎麼才能插入/更新WindmillUserImpersonate表？

Answer 1

如果你有實體WindmillUser用戶，並希望添加新的父childUser，你應該做的：

user.WindmillUsersImpersonateChild.Add(childUser); 
context.SaveChanges();