EF代码首先向模型和实体添加0到1的关系

Question

I'm trying to define the model

 public class Refund
{
    [Key]   
    public int RefundID { get; set; }

    public int Order { get; set; }
    public int? TicketID { get; set; }
    public decimal? RefundTotal { get; set; }   
    public string RefundType { get; set; }
    public DateTime? RefundDate { get; set; }

    [ForeignKey("TicketID")]
    public virtual Ticket Ticket { get; set; }

}

My problem is that I would like to have access to the refund from the Ticket object, but the FK is on the refund Table. Something like this :

Public class Ticket
{
    [Key]
    public int TicketID { get; set; }


    public virtual Refund Refund { get; set; }

}

I tried to define it with the .HasOptional() command from EF but can't make it work.

I don't really know if that is possible, any ideas?

Answer 1

达到这种效果的方法将起作用：

Refund foundRefund = Refunds.SingleOrDefault(r => r.Ticket.Id == passedInTicketId);

Answer 2

I actually found the solution :

Public class Ticket
{
    [Key]
    public int TicketID { get; set; }


    public virtual ICollection<Refund> Refund { get; set; }

}

As It is actually 0 to many relationship.

Sorry about that.