You missed the problem, I think.
The problem is the different SQL semantics that are goin on there.
On Tue, Oct 21, 2008 at 8:47 PM, Tim Scott <[EMAIL PROTECTED]> wrote:
>
> In memory transform is not what I'm after. In fact that's what I am
> trying to remedy without a lot of code repetition. I am now heading
> in this direction:
>
> session.Linq<Foo>() .Select(Foo.GetDtoSelector()).ToList();
>
> public static Func<Foo, FooDto> GetDtoSelector()
> {
> return f => new FooDto
> {
> Id = f.Id,
> Bar= f.Bar
> };
> }
>
> This allows NHibernate.Linq to do the transform in SQL while also
> allowing reuse of the transformer.
>
> This leaves only one concern. What if I have FooDetailDto and
> FooListDto which inherit from FooDto? How do I avoid repetition? I
> have asked that here:
> http://stackoverflow.com/questions/222511/refactor-to-eliminate-repetition-in-lamba-expression
> .
>
>
>
> On Oct 20, 4:30 pm, "Ayende Rahien" <[EMAIL PROTECTED]> wrote:
> > The problem is that you would need some way of letting NH know that this
> is
> > a method that should run on the results, rather than transform them.The
> > first statement will generate
> > select id, bar from FooTbl
> >
> > The second will generate
> > select * from FooTbl
> >
> > And do the transform in memory, which might be expensive.
> >
> > On Mon, Oct 20, 2008 at 11:24 PM, Tim Scott <[EMAIL PROTECTED]> wrote:
> >
> > > Currently in NH.Linq we can do this:
> >
> > > (from f in session.Linq<Foo>() select new FooDto { Id = f.Id, Bar =
> > > f.Bar }).ToList();
> >
> > > Is it conceivable to extend NH.Linq to do the same thing like so?
> >
> > > (from f in session.Linq<Foo>() select f.TransFormToDto()).ToList();
> >
> > > That is...to factor out projection transform to a method (not
> > > necessarily on the Foo class). It seems this would have great DRYness
> > > value.
> >
>
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