I know exactly what you mean. It just feels wrong having to load the list to
get the count.Have you tried with HQL?

On Tue, Oct 13, 2009 at 12:43 PM, Schlaefisch <schlaefi...@googlemail.com>wrote:

>
> No, the posts are not a child collection of the topic to avoid
> performance issues. I don't want to load all posts of all topic just
> to get the post count.
>
>
> On Oct 12, 3:14 pm, Hudson Akridge <hudson.akri...@gmail.com> wrote:
> > Are posts a child collection on your object being mapped? I ask, because
> > there might be an alternative to getting you that number. If you map a
> > Posts.Count() to a property, then map that with a read only accessor, it
> > should give you a similar solution.
> >
> >
> >
> > On Mon, Oct 12, 2009 at 6:41 AM, Paul Batum <paul.ba...@gmail.com>
> wrote:
> > > Can you post your domain object and the mapping override for it?
> > > I figure something else has to be screwing up the result of the
> formula.
> >
> > > On Mon, Oct 12, 2009 at 4:06 PM, Schlaefisch <
> schlaefi...@googlemail.com>wrote:
> >
> > >> The exact query results in a syntax error, when I replace "this_.Id =
> > >> @p0;@p0 = 1" with "this_.Id = 1" the result is correct.
> >
> > >> But even when I use "SELECT 5" as formula, the PostCount is still 0.
> >
> > >> On Oct 6, 1:16 pm, Paul Batum <paul.ba...@gmail.com> wrote:
> > >> > Off the top of my head, I can't see anything wrong with your
> mapping.
> > >> I've
> > >> > used formula columns with automapping for similar purposes without
> > >> problems.
> > >> > Have you executed that generated query against the db and confirmed
> that
> > >> it
> > >> > returned the correct results?
> >
> > >> > On Fri, Oct 2, 2009 at 9:06 AM, Schlaefisch <
> schlaefi...@googlemail.com
> > >> >wrote:
> >
> > >> > > Update: The Console Output.
> >
> > >> > > Manual SQL:
> > >> > > NHibernate: (SELECT COUNT(*) FROM forumPosts p where p.TopicID =
> 1)
> > >> > > Mapping SQL:
> > >> > > NHibernate: SELECT top 2 this_.Id as Id0_0_, this_.Title as
> Title0_0_,
> > >> > > this_.Created as Created0_0_, this_.DisplayPriority as
> DisplayP4_0_0_,
> > >> > > this_.ForumID as ForumID0_0_, (SELECT COUNT(*) FROM forumPosts p
> where
> > >> > > p.TopicID = this_.Id) as formula0_0_ FROM forumTopics this_ WHERE
> > >> > > this_.Id = @p0;@p0 = 1
> >
> > --
> > - Hudsonhttp://www.bestguesstheory.comhttp://twitter.com/HudsonAkridge
> >
>

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