Thanks for answers and for interesting article.


On 19 Mar, 01:19, Andy Hitchman <[email protected]> wrote:
> I recently blogged
> (http://andyhitchman.wordpress.com/2009/03/13/specification-pattern-li...)
> about this. My example regards the specification pattern rather than a
> method call on the entity, but you may be able to take something away
> from the post.
>
> Hope it helps.
>
> On Thu, Mar 19, 2009 at 12:57 AM, Alessandro C.
>
> <[email protected]> wrote:
>
> > I found this workaround:
>
> >                .Where(
> >                    ddt => // don't work with Linq2NHibernate
> > (ddt.IsClose() == false) &&
> >                    (ddt.NotReadyToUse == false)  &&
> >                    (customer == null || ddt.Ddt.Customer == customer)
> > &&
> >                    (article == null || ddt.Article == article))
> >                .OrderBy(ddt => ddt.Ddt.Dateddt)
> >                .ToList()
> >                .Where(ddt => ddt.IsClose() == false );
>
> > Is that the right way?
>
> > Thanks,
>
> > On 18 Mar, 11:35, "Alessandro C." <[email protected]>
> > wrote:
> >> I'm using Linq to NHibernate and I have problem using a query like the
> >> following (fragment):
>
> >>  .Where(
> >>     ddt => (ddt.IsClose() == false) &&
> >>               (ddt.NotReadyToUse == false)  &&
> >>               (customer == null || ddt.Ddt.Customer == customer) &&
> >>               (article == null || ddt.Article == article))
> >>   .OrderBy(ddt => ddt.Ddt.Dateddt).ToList();
>
> >> The problem is "ddt.IsClose() == false" because it generates the
> >> following Sql statement (fragment):
>
> >> .....WHERE (((not ((this_.NotReadyToUse = @p0)) and not (1=1))
> >> and ......etc. etc.
>
> >> As you can see it generates "and not (1=1)" that is always false and
> >> therefore the query doesn't return any rows. More the function IsClose
> >> () id never executed.
>
> >> My question is: Can I use methods inside the Where, if yes, what is
> >> wrong in my Where clause.
>
> >> Thanks,
> >> Alessandro Cavalieri
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