NHibernate mapping with a class hierarchy whose base class is abstract and the discriminator is not a string

Question

Here are the domain model classes:

public abstract class BaseClass
{
...
}

public class ChildClass : BaseClass
{
...
}

Note that the parent cl

Answer 1

I have found a workaround but this seems so like a patch... I added the following to the mapping file:

SetAttribute("discriminator-value", "-1");

It seems to instruct FNH not to use a string (I think it uses the class name) for the abstract base class. To make it work with the -1 value, I also changed my discriminator type from byte to sbyte.

Edit: I missed that: this is the second parameter to DiscriminateSubClassesOnColumn that takes the default value. So the correct answer to my question is:

DiscriminateSubClassesOnColumn<sbyte>("Type", (sbyte)-1)