Hello,

I get the following exception:

Consumer consumer = GetDaoConsumer (ID);

if (consumer.Type == EnumConsumer.Person)
Person person = (Person) consumer;

Cannot cast 'consumer' (which has an actual type of 'CProxyTypeMyNamespaceConsumerMyAssembly_NHibernate_ProxyINHibernateProxy_System_Runtime_SerializationISerializable2') to 'MyNamespace.Person'


Person, NonPerson are joined SubClasses of Consumer in the hbm.xml file

Person, NonPerson are also normal C# Classes based on the class Consumer

Person, NonPerson and Consumer are only connected via the hm.xml file with NHibernate

Is there any way to access the properties of a Person or NonPerson object?

The only thing that helps is to set lazy="false" for all 3 class definitions in the hbm.xml file. Then there are no proxy classes used...


Anyone out who can help me or has an idea?


Best regards
Pearli

NHibernate 1.2 und .NET 2.0

The proxies generated by NHibernate are sublcasses of your underlying objects, so this cast will not work. You either need to change your design or avoid lazy-loading in this case.

MIKE

Thanks Mike for the answer.

I have guess that, but I've hoped it is not that way...

Regards
Rolf

Hey Mike,

do you know it this bevavior was also in NHibernate 1.04 (lazy was false on default) or is it since 1.2 (lazy is true on default)?

Because we have this problem since we upgraded to Nhibernate 1.2.

Regards
Rolf

This is related to laziness. If you would have set lazy="true" for a class in NHibernate 1.0.4, you would see the same behavior as well.

And it's documented, see http://www.hibernate.org/hib_docs/nhibernate/html/performance.html#performance-proxies.

This is in Hibernate in Action too on page 235...

Thanks guy's

for the quick answers...

Best regards
Rolf