IPreUpdate is intended to be used for entity-state checking (veto) not to
change the state.
What is happening is that NH found a strange operation in a collection
(something like "somebody have changed it outside my control or I have a
bug").
For what you need you have to use ISaveOrUpdateEventListener
public void OnSaveOrUpdate(SaveOrUpdateEvent @event)
{
var trackable = @event.Entity as ITrackModificationDate;
if (trackable != null)
{
trackable.LastModified = CurrentDateTimeProvider();
}
}
and IFlushEntityEventListener
public void OnFlushEntity(FlushEntityEvent @event)
{
if(@event.EntityEntry.Status == Status.Deleted)
{
return;
}
var trackable = @event.Entity as ITrackModificationDate;
if (trackable != null)
{
trackable.LastModified = CurrentDateTimeProvider();
}
}
As you can see, using right events you don't need to use NH internals state.
For collection you have another set of events. In general *you shouldn't
initialize a collection* in an NH's event.
2011/5/6 Krzysztof Koźmic <[email protected]>
> I'm using Oracle database.
> I have a IPreUpdateEventListener and IPreInsertEventListener which set
> CreatedBy and UpdatedBy properties on some of the entities.
>
> Those properties point to another entity Person which is assigned in the
> listeners via Session.Load<>
>
> this all used to work quite nice when I had my POID generator specified as
> "sequence-identity" (we use sequences in Oracle)
>
> today I tried to switch POID generator to "sequence" which would allow me
> to utilize batching which I also enabled.
>
>
> Here's where I started getting this exception:
>
> collection: [Person.FooBars] was not processed by flush()
>
>
> the exception happens only when the Session.Load<> in my event listeners
> doesn't already have the Person I'm requested accessible (that is only when
> Load<Person> returns a proxy). If I load the person beforehand (and not in
> the listener) the exception does not occur.
>
>
> Any ideas what the reason for that is and how do I fix it?
>
> Krzysztof
>
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--
Fabio Maulo
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