ASP.NET MVC3 EF代碼第一次 - 許多一對多的關係

我試圖創建第一個使用EF代碼在我的MVC項目多到多的關係。我有一個場景，我有一個服務可以有許多類別可能有很多子類別。這一點似乎工作正常。ASP.NET MVC3 EF代碼第一次 - 許多一對多的關係

每個服務類別和子類別也可以有許多與其相關的HelpDeskMembers。這是我在創建關聯時遇到的問題。通過下面的課程，我期待EF創建Service_HelpDeskMembers，Category_HelpDeskMembers和Subcategory_HelpDeskMembers表。請有人引導我在正確的方向嗎？

P.S.在導航屬性中，我沒有使用虛擬的，因爲我使用AJAX和JSON創建服務/類別/子類別之間的級聯下拉列表，並通過使用「虛擬」，我得到一個循環引用錯誤。

這裏是我的班。

public class Service 
{ 
    [Key] 
    public int ServiceID { get; set; } 

    public string Title { get; set; } 
    public DateTime CreatedDate { get; set; } 
    public HelpDeskMember CreatedBy { get; set; } 
    public DateTime? DeletedDate { get; set; } 
    public HelpDeskMember DeletedBy { get; set; } 

    public ICollection<Category> Categories { get; set; } 
    public ICollection<HelpDeskMember> LinesOfSupport { get; set; } 
} 

public class Category 
{ 
    [Key] 
    public int CategoryID { get; set; } 
    [ForeignKey("Service")] 
    public int ServiceID { get; set; } 

    public string Title { get; set; } 
    public DateTime CreatedDate { get; set; } 
    public HelpDeskMember CreatedBy { get; set; } 
    public DateTime? DeletedDate { get; set; } 
    public HelpDeskMember DeletedBy { get; set; } 

    public Service Service { get; set; } 
    public ICollection<Subcategory> Subcategories { get; set; } 
    public ICollection<HelpDeskMember> LinesOfSupport { get; set; } 
} 

public class Subcategory 
{ 
    [Key] 
    public int SubcategoryID { get; set; } 
    [ForeignKey("Category")] 
    public int CategoryID { get; set; } 

    public string Title { get; set; } 
    public DateTime CreatedDate { get; set; } 
    public HelpDeskMember CreatedBy { get; set; } 
    public DateTime? DeletedDate { get; set; } 
    public HelpDeskMember DeletedBy { get; set; } 

    public Category Category { get; set; } 
    public ICollection<HelpDeskMember> LinesOfSupport { get; set; }  
} 

public class HelpDeskMember 
{ 
    public int HelpDeskMemberID { get; set; } 
    public string Name { get; set; } 
    public bool Admin { get; set; } 
    public bool Available { get; set; } 
    public DateTime? CreatedDate { get; set; } 
    public DateTime? LastLogin { get; set; } 
    public DateTime? DeletedDate { get; set; } 
    public DateTime? DeletedBy { get; set; } 

    public ICollection<Service> Services { get; set; } 
    public ICollection<Category> Categories { get; set; } 
    public ICollection<Subcategory> Subcategories { get; set; } 
}

在此先感謝。

來源

2012-01-23 Gareth Lewis