The number of properties in the Dependent and Principal Roles in a relationship constraint must be identical.

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I have two entities
1.Status
2.ActionProgress

In status entity,i want to become composite keys/

C#

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; }
 }

and other entity is

SQL

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 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

Posted 21-Apr-15 0:49am

RahulRana723

Updated 21-Apr-15 0:54am

v4

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johannesnestler 30-Apr-15 8:40am

did you solve it?

1 solution

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johannesnestler · Answer 1 · 2015-04-21T01:39:00

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

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

I think the equivalent with dataanotations would be:

C#

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; }
   }

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