當主鍵包含2個鍵與實體框架時創建1對1關係

Question

我在3個表之間有1對1的關係。

父表有2個主鍵（複合鍵）。讓我們將它們命名爲StudentId1和StudentId2。

什麼是相關的表，我會把

[Key, ForeignKey("Student")] 
    public int StudentId { get; set; } 

我不只有一個屬性！

我應該這樣做嗎？將StudentId1StudentId2寫爲相關表的關鍵屬性沒有任何意義。

RelatedTable：

[Key, ForeignKey("Student")] 
public int StudentId1 { get; set; } 

[Key, ForeignKey("Student")] 
public int StudentId2 { get; set; } 

傳統的樣本：

public class Student 
{ 
    public Student() { } 

    public int StudentId { get; set; } 
    public string StudentName { get; set; } 

    public virtual StudentAddress StudentAddress { get; set; } 

} 



public class StudentAddress 
{ 
    [Key, ForeignKey("Student")] 
    public int StudentId { get; set; } 

    public virtual Student Student { get; set; } 
} 

Answer 1

不應該Column(Order = X)工作？

public class Student 
{ 
    [Key, Column(Order = 0)] 
    public int StudentId1 { get; set; } 

    [Key, Column(Order = 1)] 
    public int StudentId2 { get; set; } 

    public virtual StudentAddress StudentAddress { get; set; } 
} 


public class StudentAddress 
{ 
    [Key, ForeignKey("Student"), Column(Order = 0)] 
    public int StudentId1 { get; set; } 

    [Key, ForeignKey("Student"), Column(Order = 1)] 
    public int StudentId2 { get; set; } 

    public virtual Student Student { get; set; } 
} 

見

• https://msdn.microsoft.com/en-us/data/jj591583.aspx
• Foreign Key mapping to composite keys in entity framework