Fluent NHibernate Mapping for Table in multiple HasMany Relationships - nhibernate

Question

What is wrong with my class mappings below?
public class Foo
{
public Foo()
{
ActualCurve = new List<Point>();
TargetCurve = new List<Point>();
}
public virtual int Id { get; set; }
public virtual string Name { get; set; }
public virtual IList<Point> ActualCurve { get; set; }
public virtual IList<Point> TargetCurve { get; set; }
}
public class Point
{
public virtual int Id { get; set; }
public virtual double X { get; set; }
public virtual double Y { get; set; }
}
public class FooMapping() : ClassMap<Foo>
{
Table("Foos");
Id(x => x.Id).GeneratedBy.Identity();
Map(x => x.Name).Not.Nullable();
HasMany(x => x.ActualCurve ).Cascade.All();
HasMany(x => x.TargetCurve ).Cascade.All();
}
public class PointMapping() : ClassMap<Point>
{
Table("Points");
Not.LazyLoad();
Id(x => x.Id).GeneratedBy.Identity();
Map(x => x.X).Not.Nullable();
Map(x => x.Y).Not.Nullable();
}
These mappings produce
CREATE TABLE [dbo].[Foos](
[Id] [int] IDENTITY(1,1) NOT NULL,
[Name] [nvarchar] NOT NULL,
[RecipeRevisionId] [int] NOT NULL
CREATE TABLE [dbo].[Points](
[Id] [int] IDENTITY(1,1) NOT NULL,
[X] [float] NOT NULL,
[Y] [float] NOT NULL,
[FooId] [int] NOT NULL
Essentially, the problem is that when I am pulling a persisted Foo object back out of the database, the Foo.ActualCurve and Foo.TargetCurve lists both get populated with the combined contents of both lists. There clearly isn't a column that keys which set of points belong to the correct curve within Foo, but I am not sure how to change the mapping to maintain the two distinct sets of Points.

Answer 1

I think you will need to specify a separate column for the references:
HasMany(x => x.ActualCurve ).Cascade.All().KeyColumn("ActualCurveId");
HasMany(x => x.TargetCurve ).Cascade.All().KeyColumn("TargetCurveId");
EDIT: Column->KeyColumn