It seems that NH 1.2.0 beta does not function so well with caching one-to-one relationships using either the constrained=true semantics or the property-ref fk type.

In both cases I get lots of excess queries to read this data redundantly, even though the query cache and 2nd level cache is working fine for all other objects and relationships.

Any word on a fix for this?

NHibernate does not (currently) cache property-ref-ed objects because the cache only supports storage and retrieval by id and NHibernate doesn't know the id.

Can't tell anything about constrained though, I believe it should work.

OK thanks. I'll check into the constrained more and post a reproducible case if I still see a problem. Thanks!