I have entities, where Entity is a standard base class with .IgnoreBase<Entity>()
public class Order : Entity { public virtual string Name { get; set; } } public class CollectiveOrder : Order { public virtual string OrdersList { get; set; } } Their successfully discriminated with custom overriding public override bool IsDiscriminated(Type type) { return type.In(typeof (Order)); } but when I try to override default discriminator type or set value, I don't see any changes: public class OrderMappingOverride : IAutoMappingOverride<Order> { public void Override(AutoMapping<Order> mapping) { mapping.DiscriminateSubClassesOnColumn<int>("Discriminator", 0); mapping.SubClass<CollectiveOrder>(1); } } resulting mapping is <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" default- access="property" auto-import="true" default-cascade="none" default- lazy="true"> <class xmlns="urn:nhibernate-mapping-2.2" mutable="true" name="Dto.Entities.Order, Dto, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" table="Orders"> <id name="Id" type="System.Int32, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"> <column name="Id" /> <generator class="identity" /> </id> <discriminator type="String"> <column name="Discriminator" /> </discriminator> <property name="Name" type="System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"> <column name="Name" /> </property> <subclass name="Dto.Entities.CollectiveOrder, Dto, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null"> <property name="OrdersList" type="System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"> <column name="OrdersList" /> </property> </subclass> </class> </hibernate-mapping> Technical info Fluent NHibernate was taken from NuGet package: Version:1.1.0.0 MsSql2008 NHibernate 3.0.0.4000 FW 4 -- You received this message because you are subscribed to the Google Groups "Fluent NHibernate" group. To post to this group, send email to fluent-nhibernate@googlegroups.com. To unsubscribe from this group, send email to fluent-nhibernate+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/fluent-nhibernate?hl=en.