Stuart, are you working with EntityMode.Map and WCF ?
2009/5/13 Stuart <[email protected]>
>
> Hello All --
>
> I believe I may have discovered a bug in the Session.Merge() method,
> specifically in the overload that takes string 'entityName' and object
> 'obj'. This overload pertains to entity mode of dynamic-map, rather
> than POCO. I'm posting here because I'd like some feedback as to
> whether what I'm seeing is in fact a bug or just my misunderstanding.
>
> The behavior I'm observing goes like this... I have an entity
> persisted to the database. Let's say it's defined as follows:
>
> entity["Id"] = 1
> entity["Name"] = "foo"
> entity["Inserted"] = "2005/05/05"
>
> Next I create a non-persisted entity that represents an updated
> version of the aforementioned entity.
>
> editedEntity["Id"] = 1
> editedEntity["Name"] = "bar"
>
> Notice that Id is set to 1, signifying that we are dealing with an
> updated version of our persisted entity. Notice also that we have no
> Inserted field on our edited entity. This is because we don't need to
> update that field, for obvious reasons. So now I want to persist the
> edited entity, and here's where the alleged bug is manifesting. If I
> call...
>
> session.Save("Widget", editedEntity);
>
> ...the record in the database gets updated ('foo' becomes 'bar'), but
> Inserted gets updated to NULL. Perhaps this could be considered a bug,
> but in a way it makes sense -- I didn't supply a value, so NH provides
> a null for that field. So I try being more explicit...
>
> var merged = session.Merge("Widget", editedEntity);
> session.Save("Widget", merged);
>
> But here again, Inserted gets updated to NULL. When I call Merge() I
> want the persisted values to take precedence for unset values in my
> editedEntity, but clearly that doesn't happen. Any values unset in
> editedEntity get set to NULL in the merged entity.
>
> Is this a bug? I have a failing test that I'm happy to upload
> somewhere, if that's useful. If this is a bug, I'd be happy to have a
> go at creating a patch.
>
>
> Thanks in advance,
>
> --Stuart
> >
>
--
Fabio Maulo
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