what you mean with "empty collection" ?The collection is proxy and empty (all collections) when the collection owner is created by NH. If you want a very special behaviour you can use ICollectionTypeFactory, of NH2.1.0, and override the behaviour of all collections generated by NH (to be clear you can have your own implementation for each collection type as default for NH).
2009/7/21 desfen <[email protected]> > > I posted a message on the old forums (which still seem quite active) > but > got no reply there so I'll try here. > > We've been digging into the very rich possibilties that NHibernate > provides > for efficient querying and eager fetching and we *lurve* it BUT we > seem to > have hit a bit of a snag: > > When a parent object's child collection is empty, NHibernate neglects > to properly init the collection. As far as we can see from looking at > the > source, this is by design. If there's no data for the collection, > NHibernate > doesn't get around to initing the collection. We have been trying to > change > this behaviour because we don't want lazy init exceptions thrown when > we > access an empty collection. However we can't seem to get our head > around > this problem and we can't seem to find a way to fix this. > > We do have a ridiculous workaround, in which we loop over our objects > (and their > children's children's children, it's a deep query) and "touch" every > child collection > before closing the session. In the case of many empty child > collections this > will degenerate into the SELECT N + 1 anti-pattern, which we wanted to > avoid > in the first place by using multi-queries for our deep object queries. > > I have found an old but relevant bug in JIRA that seems to getting > pushed forward with > every release. > > http://nhjira.koah.net/browse/NH-1211 > > We get the impression that there's a (better) trick for working around > this problem > because nobody seems to be overly concerned about fixing this. > > Can anbody please give us some more info on this ? > > Thank you so much ! > > > > > -- Fabio Maulo --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "nhusers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nhusers?hl=en -~----------~----~----~----~------~----~------~--~---
