Fluent Nhibernate: ignore interfaces/abstract classes during BuildSchema or UpdateSchema - fluent-nhibernate

Question

Edit
I've got an interface that I'd like to base some classes on. When I go to BuildSchema (or UpdateSchema), Nhibernate creates a table for the interface. I thought I found a work-around as follows:
The Interface and Classes:
public interface ILevel
{
int Id { get; set; }
string Name { get; set; }
}
public abstract class Level : ILevel
{
public virtual int Id { get; set; }
public virtual string Name { get; set; }
}
public class LevelOne : Level { }
public class LevelTwo : Level { }
The Mappings:
public class LevelMap : ClassMap<ILevel>
{
public LevelMap()
{
Id(x => x.Id);
Map(x => x.Name);
}
}
public class LevelOneMap : SubclassMap<LevelOne>
{
}
public class LevelTwoMap : SubclassMap<LevelTwo>
{
}
This doesn't work (I did another UpdateSchema and the pesky ILevel table appeared).
Is there a configuration I'm unaware of to ignore interfaces/abstract classes altogether?

Answer 1

For seperate tables LevelOne and LevelTwo, that both have the properties of Level/ILevel, use a generic mapping for Level:
public abstract class LevelMap<T> : ClassMap<T>
where T : Level // ILevel should work, too
{
protected LevelMap()
{
Id(x => x.Id);
Map(x => x.Name);
}
}
public class LevelOneMap : LevelMap<LevelOne>
{
}
public class LevelTwoMap : LevelMap<LevelTwo>
{
}
You provide two separate class mappings without telling Fluent the real class hierarchy.