MVC 4外鍵屬性

我有一個模型有兩個字段有一個外鍵連接到不同的表。他們有不同的名字，我無法弄清楚如何讓這種關係發揮作用。MVC 4外鍵屬性

這是我的兩個對象。 Visitor和Home Teams是我在設置關係時遇到的問題。

我得到的錯誤是：

「無法檢索「Models.Game的元數據的 ForeignKeyAttribute財產VisitorID上鍵入‘Models.Game’不是有效的導航。屬性'Team'在依賴類型'Models.Game'上找不到。名稱值應該是有效的導航屬性 name。「

public class Team 
{ 
    public Int64 TeamID { get; set; } 

    [Required(ErrorMessage = "{0} is required")] 
    [Display(Name = "Team Name")] 
    public string Name { get; set; } 

    [Required(ErrorMessage = "{0} is required")] 
    [Display(Name = "League Name")] 
    [ForeignKey("League")] 
    public Int64 LeagueID { get; set; } 

    public virtual League League { get; set; } 
} 

public class Game 
{ 
    public Int64 GameID { get; set; } 

    [Required(ErrorMessage = "{0} is required")] 
    [Display(Name = "Season Name")] 
    [ForeignKey("Season")] 
    public Int64 SeasonID { get; set; } 

    public virtual Season Season { get; set; } 

    [Required(ErrorMessage = "{0} is required")] 
    [DataType(DataType.DateTime)] 
    [Display(Name = "Game Time")] 
    public DateTime Time { get; set; } 

    [Required(ErrorMessage = "{0} is required")] 
    [Display(Name = "Visitor Team")] 
    [ForeignKey("Team")] 
    public Int64 VisitorID { get; set; } 

    public virtual Team Visitor { get; set; } 

    [Required(ErrorMessage = "{0} is required")] 
    [Display(Name = "Home Team")] 
    [ForeignKey("Team")] 
    public Int64 HomeID { get; set; } 

    public virtual Team Home { get; set; } 

    [Required(ErrorMessage = "{0} is required")] 
    [Display(Name = "Rink")] 
    [ForeignKey("Location")] 
    public Int64 LocationID { get; set; } 

    public virtual Location Location { get; set; } 

    public virtual List<GameEvent> GameEvents { get; set; } 
}

來源

2015-04-20 Jesse Jaime

什麼是錯誤？＆爲什麼你的主鍵是32位整數和64位的混合？ – BenjaminPaul

如果您刪除所有不需要的額外代碼和數據註釋將會很有幫助，因此我們更容易閱讀（比如'required'和'display'） –

更改您的FK屬性。它必須包含導航屬性名稱，而不是類型

[Required(ErrorMessage = "{0} is required")] 
    [Display(Name = "Visitor Team")] 
    [ForeignKey("Visitor")] 
    public Int64 VisitorID { get; set; }

來源

2015-04-20 14:23:33

經過幾天的研究，我發現我在做什麼錯誤的遊戲模型。馬丁說，我需要使用導航屬性是正確的。我還需要將[ForeignKey]屬性放在引用屬性上，而不是ID。我列出了訪問者和家庭團隊下面的更正代碼

[Required(ErrorMessage = "{0} is required")] 
    [Display(Name = "Visitor Team")]    
    public Int64 VisitorID { get; set; } 

    [ForeignKey("VisitorID")] 
    public virtual Team Visitor { get; set; } 

    [Required(ErrorMessage = "{0} is required")] 
    [Display(Name = "Home Team")]   
    public Int64 HomeID { get; set; } 

    [ForeignKey("HomeID")] 
    public virtual Team Home { get; set; }

來源

2015-04-22 15:13:30

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