Hey there. I have been trying to figure out how to configure the mapping with both NH and FluentNH for days, and I think I'm almost there, but not quite. I have the following problem.

What I need to do is basically map these two entities, which are simplified versions of the actual ones.

Airlines
varchar2(3) airlineCode //PK
varchar2(50)

Aircraft
varchar2(3) aircraftCode //composite PK
varchar2(3) airlineCode //composite PK, FK referencing PK in Airlines
varchar2(50) aircraftName

My classes look like

class Airline
{
    string AirlineCode;
    string AirlineName;
    IList<Aircraft> Fleet;
}

class Aircraft
{
    Airline Airline;
    string AircraftCode;
    string AircraftName;
}

Using FluentNH, I mapped it like so

AirlineMap
    Table("Airlines");
    Id(x => x.AirlineCode);
    Map(x => x.AirlineName);
    HasMany<Aircraft>(x => x.Fleet)
    	.KeyColumn("Airline");

AircraftMap
    Table("Aircraft");
    CompositeId()
    	.KeyProperty(x => x.AircraftCode)
    	.KeyReference(x => x.Airline);
    Map(x => x.AircraftName);
    References(x => x.Airline)
    	.Column("Airline");

Using Nunit, I'm testing the addition of another aircraft, but upon calling transaction.Commit after session.Save(aircraft), I get an exception: "System.IndexOutOfRangeException : Invalid index 22 for this OracleParameterCollection with Count=22." The Aircraft class (and the table) has 22 properties.

Anyone have any ideas?