No data for table with 2 foreign keys to one table EF 6

Question

ASP.NET. EF 6.0.2, MVC 5.1.1. I have a table with 2 foreign keys to the same table.

public class order
{
public int orderID {get;set;}
public int deliveryplaceID {get;set;}
public int invoiceplaceID {get;set;}

public virtual Place Deliveryplace {get;set;}
public virtual Place Invoiceplace {get;set;}
}

Saving of the object works fine, and the deliverplaceID and invoiceplaceID in the database-table were filled. Now, when I try to show the data:

public ActionResult Index()
{
var orderdata = db.order.Include(d => d.Deliveryplace).Include(i => i.Invoiceplace);
return View(orderdata.ToList());
}

In the view:

@Html.DisplayFor(modelItem => item.Deliveryplace.Zip)
@Html.DisplayFor(modelItem => item.Invoiceplace.Zip)

It does not show any data for this two fields. Other fields are shown, also other fields of other foreign tables. Any ideas?

Answer 1

Solved. Thanks for your tip JC. You put me on the right way.

Solution was
1) Define the foreignkey in order table

public class order
{
public int orderID {get;set;}
public int deliveryplaceID {get;set;}
public int invoiceplaceID {get;set;}

[ForeignKey("deliveryplaceID")]
public virtual Place Deliveryplace {get;set;}
[ForeignKey("invoiceplaceID")]
public virtual Place Invoiceplace {get;set;}
}

2) Define in modelContext:

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Entity<order>()
.HasRequired(c => c.Deliveryplace)
.WithMany()
.WillCascadeOnDelete(false);

modelBuilder.Entity<order>()
.HasRequired(c => c.Invoiceplace)
.WithMany()
.WillCascadeOnDelete(false);
}