Hibernate version:1.2.0Beta

I cannot serialize objects that have children with lazy loading enabled. Here is the error I get:

System.InvalidOperationException: There was an error generating the XML document. ---> System.InvalidOperationException: CProxyTypePaymentTypeDomains_INHibernateProxy_ISerializable2 cannot be serialized because it does not have a parameterless constructor.

When I turn lazy loading off in the child objects the error goes away. Is there a way to do this?

I have seen a Spring filter which cleans out any references to non-initialized proxies (which are causing your error). If you can live without serializing the actual proxy (i.e. that property would be null), then have a look at this:

http://blog.murf.org/2005/04/06/lazy-lo ... -cleanser/

I believe this is for Java, but you can look at the source code and adopt to your needs in .NET.

-Sasha Borodin

The cleanser looks like it was created to fix a 'similar' problem but what I really need is something that does the exact opposite. I want objects that have lazy="true" and have not yet been loaded to be serialzed as well. Thus far we have just been touching a property in each object which will cause it to be loaded, but it is a far-from-ideal solution for sure.

I can write my own little method to go through and cause a property to become lazy loaded. Does anyone know of a way to cause something to be lazy loaded without having to attempt to read a value?

Yes, use:

NHibernateUtil.Initialize( lazyObject );