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I have a problem. I have one to many relation in a database and I want to use interfaces.

How I can realize this?

[Table("CashRegister")]
public class CashRegister : ICashRegister
{
    [DataMember]
    [Key]
    public Guid Id { get; set; }
    [DataMember]
    public double Sum { get; set; }
    [DataMember]
    public string Name { get; set; }
    [DataMember]
    public Guid CurrencyId { get; set; }

    [DataMember]
    [ForeignKey("CurrencyId")]
    public ICurrency Currency { get; set; }       
}
public interface ICashRegister 
{
    [Key]
    Guid Id { get; set; }
    string Name { get; set; }
    Guid CurrencyId { get; set; }
    [ForeignKey("CurrencyId")]
    ICurrency Currency { get;set; }
    double Sum { get; set; }

}
Improve this question
2
  • possible duplicate of error when using interfaces for Entity Framework (4.2) entities (Still applies) Commented Jul 10, 2014 at 22:28
  • Unforutnately, @GertArnold is right. I believe that EF7 will support Dependency Injection, however and will allow you to do define concrete mappings to interfaces... But that's a ways out yet. Commented Jul 10, 2014 at 22:58
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