Include Foreign Key Properties in DataObjects.Net

Question

I'm recently concerned in the problems we have with Entity Framework and we may need to find a replacement. According to ORMBattle, the best candidate is DataObjects.Net, the result of my initial investigations are very promising, except one feature that we need in our structure:

Consider two classes: Order and Customer, in class "Order" I have a "Customer" navigation property (and probably an "Orders" navigation property in the Customer class). I also need a property CustomerID in class Order. this is totally possible in lowly EF4.

How can I achieve this goal?

Answer 1

you can add non-persistent property with special getter that does the job:

public long CustomerId
{
  get
  {
    return GetReferenceKey(TypeInfo.Fields["Customer"]).Value.GetValue<long>(0);
  }
}

The setter can be added in the same manner.

Hope that helps.

P.S.
This is a copy of the original answer that can be found on the official DataObjects.Net support site.