Fabio, Graham, and John, thank you for your help. From your posts, I
now understand how the proxies work a little better -- I don't usually
need to worry about replacing them with the proper objects, I just
need to make sure I've accessed all the data I need before the session
is closed.
However, I think there's also a more subtle issue I'm facing. I get
an error with this code:
----------
IList<Instrument> instrumentList;
using (ISession ses = NHibernateHelper.OpenSession())
using (ses.BeginTransaction())
{
instrumentList = ses.CreateQuery(@"FROM
Instrument").List<Instrument>();
string WontLoad =
instrumentList[0].Location.Institution.ToString();
ses.Transaction.Commit();
}
----------
What Happens: NullException, because I call ToString() on Institution,
which is null.
What I Expect: Location.Institution is initially null -- because its a
lazy loaded reference stored in a LocationProxy. But I would expect
Institution to be lazily loaded when I cann ToString() on it -- and
yet that's not what I'm observing.
I've checked the database thoroughly and am very confident that the
data is saved properly.
My main question: Am I using the NHibernate data retrieval API
improperly, or is there something else going on behind the scenes
(like an error in my XML mapping) that's preventing lazy loading from
operating correctly?
On Mar 15, 6:42 pm, John Davidson <[email protected]> wrote:
> I have found the best performance is to create a separate object for the
> grid and move data from the NHibernate object to the grid object. Instead of
> using a grid hierarchy I put a second grid on the page to manage the child
> data and only get the child data after the user makes a selection of the
> parent. Of course the second grid also has its own data object.
>
> Doing it like this there is no issue with proxies or sending too much
> unnecessary data to the web page. It keeps the web page leaner and more
> responsive.
>
> John Davidson
>
> On Mon, Mar 15, 2010 at 4:27 PM, Graham Bunce <[email protected]>wrote:
>
>
>
> > Sorry, too tired to read the full post and work out what's going on
> > for you but look at this thread that I raised with similar questions:
>
> >http://groups.google.com/group/nhusers/browse_thread/thread/fce0810be...
>
> > A proxy will always be a proxy unless you force replace it (I think)
>
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