There is a special property class that accesses the discriminator value of an instance in the case of polymorphic persistence.

In HQL: from Eg.Cat cat where cat.class = Eg.DomesticCat

In IQuery: "and product.class = :productType "

In ICriteria:?
This does not work --> cProduct.Add(Expression.Eq("class", true))

You example should work, if you know the discriminatorvalue in your code.

For instance if one of the subclasses of Foo har discriminator "BAR" the following code would work:



Perhabs take a look at the generateded SQL to see what goes wrong.

I wish I could see the sql but I get an error on the ICriteria.List<T>() method "Can not reslove property: class of: ..."

However I just rebuilt and it seems to be working. Wierd - maybe the web application needed to be stopped and started for the SessionFactory to be reconstructed?

Out of interest do you know what would have caused the error above?

thx!

I have no idea, it sounds a little bit strange. My best guess would be that you spelled class in wrong casing.