关系约束中的从属角色和主要角色中的属性数必须相同。 [英] The number of properties in the Dependent and Principal Roles in a relationship constraint must be identical.

问题描述

我有两个实体

1.Status

2.ActionProgress



在状态实体中，我想要成为复合键/

I have two entities
1.Status
2.ActionProgress

In status entity,i want to become composite keys/

public class Status
 {
     [Key, Column(Order = 0)]       
     public int Id { get; set; }
     public string Name { get; set; }   
     [Key, Column(Order = 1)]
     public int LanguageId { get; set; }    
     [ForeignKey("LanguageId")]
     public virtual Language Language { get; set; }
 }

和其他实体是

and other entity is

public class ActionProgress
   {
       [Key,Column(Order=0)]
       [DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
       public int ActionProgressID { get; set; }     
    
       public int? StatusID { get; set; }    
      
       [ForeignKey("StatusID")]
       public virtual Status ActionProgressStatus { get; set; }
   }

i我正在使用代码第一种方法。当我运行我的应用程序时，

抛出错误，

关系约束中的从属角色和主要角色中的属性数量必须相同。





i不知道我做错了什么。请帮助

i am using code first approach.when i run my application,
the error is throwing,
"The number of properties in the Dependent and Principal Roles in a relationship constraint must be identical."


i don't know what i am doing wrong.please help

推荐答案

我用我的所有实体配置流利的API

（我可以写

I do all my entity configuration with the fluent API
(where I could write

...HasForeignKey(e => new { e.ID, e.LanguageID })

我认为与dataanotations相当的是：

I think the equivalent with dataanotations would be:

public class ActionProgress
   {
       [Key,Column(Order=0)]
       [DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
       public int ActionProgressID { get; set; }

       [ForeignKey("ActionProgressStatus", Column(Order = 0)]
       public int? StatusID { get; set; }
       [ForeignKey("ActionProgressStatus", Column(Order = 1))]
       public int? StatusLanguageID { get; set; }

       public virtual Status ActionProgressStatus { get; set; }
   }

请自己试试......会的好的，如果你留下一个便条，如果它有用......

Please try for yourself... Would be nice if you leave a note if it worked...

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