An NHibernate audit trail that doesn't cause “collection was not processed by flush” errors

Question

Ayende has an article about how to implement a simple audit trail for NHibernate (here) using event handlers.

Unfortunately, as can be seen in the comments, his impl

Answer 1

I was able to solve the same problem using following workaround: set the processed flag to true on all collections in the current persistence context within the listener

public void OnPostUpdate(PostUpdateEvent postEvent)
{
    if (IsAuditable(postEvent.Entity))
    {
       //skip application specific code

        foreach (var collection in postEvent.Session.PersistenceContext.CollectionEntries.Values)
        {
            var collectionEntry = collection as CollectionEntry;
            collectionEntry.IsProcessed = true;
        }

        //var session = postEvent.Session.GetSession(EntityMode.Poco);
        //session.Save(auditTrailEntry);
        //session.Flush();
    }
}

Hope this helps.