NHibernate Collection Sub Query

Question

Is there a way to add criteria to a mapping for NHibernate?

public class Course {
   public IList Participants { get; set; }
   public IList&l         


        

Answer 1

If you have subclasses of Participant with the status being the DiscriminatorValue, I think you can have them as separate lists since this way nHibernate knows how to differentiate them.

public class ParticipantMap : ClassMap
{
    public ParticipantMap()
    {
        DiscriminateSubClassesOnColumn("Status");
    }
}
public class ActiveParticipantMap : SubclassMap
{
    public ActiveParticipantMap ()
    {
        DiscriminatorValue("Active");
    }
}
// other subclasses of participant e.g. NonActive, etc.

public class Course {
    public IList Participants {get;set;}
    public IList ActiveParticipants {get;set;}
    // any other lists of participant subclasses that you may have
}