Session.CreateQuery("select count(*) from Post p WHERE p.Topic.Id=" +
topic.Id)
works fine, but
mapping.Map(t => t.PostCount).Formula("(select count(*) from Post p
WHERE p.Topic.Id = Id)");
results in an SqlException (Invalid object name 'Post')
On Oct 13, 12:49 pm, Mikael Henriksson <mik...@zoolutions.se> wrote:
> 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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