the owner is a good thing to use, but it doesn't contain the previous
state.
I created some code to get the previous state with reflection.
If you know where to get it without reflection, your code is always
welcome :)
public void OnPostUpdate(PostUpdateEvent evt)
{
object[] old = evt.OldState;
DataObject dataObject = evt.Entity as DataObject;
if (dataObject != null)
{
#region get dirty collections (previous state)
IList collUpdates =
evt.Session.ActionQueue.GetFieldValue("collectionUpdates") as IList;
foreach (CollectionUpdateAction item in collUpdates)
{
FieldInfo fi =
item.GetType().BaseType.GetField("persister", BindingFlags.Instance |
BindingFlags.NonPublic | BindingFlags.IgnoreCase);
ICollectionPersister persister = fi.GetValue(item)
as ICollectionPersister;
string propertyName =
persister.Role.Split('.').Last();
fi =
item.GetType().BaseType.GetField("collection", BindingFlags.Instance |
BindingFlags.NonPublic | BindingFlags.IgnoreCase);
IPersistentCollection coll = fi.GetValue(item) as
IPersistentCollection;
if (coll.Owner != evt.Entity) continue;
if (coll.IsDirty)
{
if (Array.IndexOf(evt.Persister.PropertyNames,
propertyName) != -1)
{
if (coll.StoredSnapshot != null &&
(coll.StoredSnapshot as IList).Count > 0)
{
old[Array.IndexOf(evt.Persister.PropertyNames, propertyName)] =
coll.StoredSnapshot;
}
else
{
old[Array.IndexOf(evt.Persister.PropertyNames, propertyName)] = new
List<object>();
}
}
}
}
#endregion
CreateChangelog(dataObject, old,
evt.Persister.PropertyNames, evt.Session);
}
}
On 25 mei, 12:58, John Davidson <[email protected]> wrote:
> I have not used this myself. It may be that there is an incomplete
> implementation or an error in the collection.
>
> What happens when you access the the collection from the
> PostCollectionUpdateEvent.AffectedOwnerOrNull property? What about the
> MemberwiseClone property?
>
> John Davidson
>
>
>
> On Tue, May 25, 2010 at 3:40 AM, Peter Derwa <[email protected]> wrote:
> > Hi John,
> > I looked at it but I didn't really see where i can find the changes.
> > Did you ever look at it yourself? Do you have any Idea where to find
> > it?
>
> > PS: I'm using the SaveOrUpdateCopy since I'm running a WCF service
> > which is closing the session every call, since there are too many
> > users to keep sessions open.
> > the SaveOrUpdate doesn't work, because then the old state does not
> > appear in the PostUpdate EventListener.
>
> > someone also mentioned he was using the session.Refresh, is that also
> > an option?
>
> > grt
>
> > On 21 mei, 12:38, John Davidson <[email protected]> wrote:
> > > I suggest you look at IPostCollectionUpdateEventListener
>
> > > John Davidson
>
> > > On Fri, May 21, 2010 at 4:22 AM, Peter Derwa <[email protected]> wrote:
> > > > Hi,
>
> > > > I'm inspecting the IPostUpdateEventListener and I notice that the
> > > > Oldstate of the Collection of an many to many property isn't correct.
> > > > the Oldstate also contains the current version, not the previous
> > > > version.
>
> > > > Is there a way to find out what the changes are through another
> > > > eventlistener (or if possible of course, i'd like to have it in the
> > > > same one).
>
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