Hi all,
I am experimenting with abstract domain classes which I instantiate
with Castle Dynamic Proxy. This is the error I am getting when asking
Fluent NHibernate to create my session factory:
---> System.NotSupportedException: Attempting to parse a null value
into an sql string (column:two0_.type).
at NHibernate.SqlCommand.InFragment.ToFragmentString()
Here is a reduced version of my domain, note both are abstract:
public abstract class One
{
public virtual int Id { get; set; }
}
public abstract class Two : One
{
public virtual string Name { get; set; }
}
And the table-per-hierachy mapping classes that go with it:
public class OneMap : ClassMap<One>
{
public OneMap()
{
Table("ones");
Id(x => x.Id);
DiscriminateSubClassesOnColumn("type");
}
}
public class TwoMap : SubclassMap<Two>
{
public TwoMap()
{
DiscriminatorValue(123);
Map(x => x.Name);
}
}
Is there something I can add to make it accept my abstract sub class?
As it is proxied at runtime I do not know what the type will be, I
just want anything derived from TwoMap to use 123 as it's
discriminator.
Any suggestions?
Thanks
Barry
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