Argh!  It looks promising, but now I'm being bit by a bug in NH3.2GA:
2819 (https://nhibernate.jira.com/browse/NH-2819?
focusedCommentId=21954#comment-21954):

"System.InvalidOperationException: Late bound operations cannot be
performed on types or methods for which ContainsGenericParameters is
true."

I can't win.

On Oct 27, 2:11 pm, Anne Epstein <[email protected]> wrote:
> I believe this issue was fixed in the recently-released NH 3.2, please
> give that version a try if you're on an earlier version.  If you're
> still seeing this problem on 3.2, please file a bug 
> here:https://nhibernate.jira.com/and note that it's probably related to
> this issue:https://nhibernate.jira.com/browse/NH-1747.
>
> Good luck!
>
> Anne
>
>
>
>
>
>
>
> On Thu, Oct 27, 2011 at 12:58 PM, Trinition <[email protected]> wrote:
> > I have a hierarchial set of parent Foos and child Bars, both of which
> > extend from the same base type.  In my code, I invoke
> > "myBase.Children":
>
> >    foreach (BaseType base in myBase.Children) // <-- this line throws
> > the error
> >    {
> >        Activate(base, owner);
> >    }
>
> > This code gets an error.  The error indicates that the NHibernate 3.1
> > generated SQL is wrong (yes, BaseID does appear twice in a row!):
>
> >    SELECT BaseType.FooID,
> >       BaseType.BaseID,
> >       BaseType.BaseID,
> >       BaseType.Name,
> >       Bar.FooID,
> >    FROM dbo.Bases BaseType
> >       inner join dbo.Bars Bar
> >         on BaseType.BaseID = Bar.BarID
> >    WHERE BaseType.FooID = 136 /* @p0 */
>
> > But "FooID" doesn't exist in BaseType.  It *does* exist in Bars.  Why
> > does NHibernate expect the column on the base class' table instead of
> > the parent classes table?  For what its worth, "Base" is abstract.
>
> > Here's my FluentNHibernate mapping:
>
> >    public class FooMap : SubclassMap<Foo>
> >    {
> >        public FooMap()
> >        {
> >            DiscriminatorValue(3);
> >            Join("Foos", m =>
> >            {
> >                m.KeyColumn("FooID");
> >                ...
> >                m.HasMany(x => x.Bars)
> >                    .KeyColumn("FooID")
> >                    .AsSet()
> >                    .Cascade.All()
> >                    .LazyLoad();
> >                ...
> >            });
> >        }
> >    }
>
> > I've reproduced this in a tinym sloppy integration test where I do
> > "myBase.Children.Count()" instead, but it fails with the same error.
>
> > --
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