Fluent NHibernate Mapping a column against one of two columns

Question

I\'m dealing with some legacy vendor code that I can\'t modify. I\'d like to wrap the database with an abstraction layer that is easier to use.

Given the following two

Answer 1

It's not elegant, but I finally came up with the following:

public class Process
{
    public virtual IList SourceRoutes { get; set; }
    public virtual IList DestinationRoutes { get; set; }
}

public class ProcessOverride : IAutoMappingOverride
{
    public void Override(AutoMapping mapping)
    {
        mapping.HasMany(proc => proc.SourceRoutes).Table("Routes").KeyColumn("SourceID");
        mapping.HasMany(proc => proc.DestinationRoutes).Table("Routes").KeyColumn("DestID");
    }
}