MVC 4外键属性

我有一个模型有两个字段有一个外键连接到不同的表。他们有不同的名字，我无法弄清楚如何让这种关系发挥作用。MVC 4外键属性

这是我的两个对象。 Visitor和Home Teams是我在设置关系时遇到的问题。

我得到的错误是：

“无法检索“Models.Game的元数据的 ForeignKeyAttribute财产VisitorID上键入‘Models.Game’不是有效的导航。属性'Team'在依赖类型'Models.Game'上找不到。名称值应该是有效的导航属性 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; } 
}

来源

2015-04-20 Jesse Jaime

什么是错误？＆为什么你的主键是32位整数和64位的混合？ – BenjaminPaul

如果您删除所有不需要的额外代码和数据注释将会很有帮助，因此我们更容易阅读（比如'required'和'display'） –

更改您的FK属性。它必须包含导航属性名称，而不是类型

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

来源

2015-04-20 14:23:33

经过几天的研究，我发现我在做什么错误的游戏模型。马丁说，我需要使用导航属性是正确的。我还需要将[ForeignKey]属性放在引用属性上，而不是ID。我列出了访问者和家庭团队下面的更正代码

[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; }

来源

2015-04-22 15:13:30

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