多對多有多餘字段，實體框架

Question

如何映射自定義與添加字段的多對多關係？在這種情況下Schedule中的DateTime。

現在的問題是它創建了一個名爲StaffSchedules

public class Schedule 
{ 
    public int Id { get; set; } 
    public DateTime DateTime { get; set; } 

    public List<Staff> Staff { get; set; } 
    public int StaffId { get; set; } 

    public Patient Patient { get; set; } 
    public int PatientId { get; set; } 
} 

public class Staff 
{ 
    public int Id { get; set; } 
    public string FirstName { get; set; } 

    public List<Schedule> Schedules { get; set; } 
} 

新表...

public DbSet<Schedule> Schedules { get; set; } 
public DbSet<Staff> Staff { get; set; } 

期望的結果：

Answer 1

添加類，如下所示：

public class StaffSchedule 
{ 
    public int StaffId { get; set; } 
    public int ScheduleId { get; set; } 
    public virtual Staff Staff { get; set; } 
    public virtual Schedule Schedule { get; set; } 

    public DateTime Date { get; set; } 
} 

修改您的員工和安排課程：

public class Schedule 
{ 
    public int Id { get; set; } 
    //Other Fields 
    public ICollection<StaffSchedule> StaffSchedules { get; set; } 
} 

public class Staff 
{ 
    public int Id { get; set; } 
    //Other Fields 
    public ICollection<StaffSchedule> StaffSchedules { get; set; } 
} 

最後，在你的環境文件（OnModelCreating法）：

modelBuilder.Entity<Staff>().HasKey(x => x.Id); 
modelBuilder.Entity<Schedule>().HasKey(x => x.Id); 

modelBuilder.Entity<StaffSchedule>().HasKey(x => 
    new 
    { 
     x.StaffId, 
     x.ScheduleId 
    }); 

modelBuilder.Entity<StaffSchedule>() 
    .HasRequired(x => x.Staff) 
    .WithMany(x => x.StaffSchedules) 
    .HasForeignKey(x => x.StaffId); 

modelBuilder.Entity<StaffSchedule>() 
    .HasRequired(x => x.Schedule) 
    .WithMany(x => x.StaffSchedules) 
    .HasForeignKey(x => x.ScheduleId); 

UPDATE：

看起來你其實想要這個：

public class Patient 
{ 
    public int Id { get; set; } 
    public string Name { get; set; } 
} 

public class Staff 
{ 
    public int Id { get; set; } 
    public string Name { get; set; } 
} 

public class Schedule 
{ 
    public int Id { get; set; } 
    public DateTime Date { get; set; } 

    public int PatientId { get; set; } 
    public int StaffId { get; set; } 

    [ForeignKey("PatientId")] 
    public virtual Patient Patient { get; set; } 
    [ForeignKey("StaffId")] 
    public virtual Staff Staff { get; set; } 
}