[Dbix-class] using load_classes selectively

[Frazer Irving]

The business req

On Feb 8, 2008 7:59 AM, Matt S Trout <dbix-class at trout.me.uk> wrote:

> On Thu, Feb 07, 2008 at 04:39:05PM +0000, Frazer Irving wrote:
> > Hi everybody,
> >
> > I'm a first time poster to this list. I hope I have the right place to
> ask
> > this question.
> >
> > I am currently in the process of setting up DBIx::Class as the ORM for
> my
> > employer. I have setup the basic structure as so...
> >
> > package My::DB;
> > use base qw/DBIx::Class::Schema/;
> > __Package__->load_classes();
> >
> > package My::AbstractClass;
> > use base qw(DBIx::Class);
> >
> > package My::DB::Foo;
> > use base qw(My::AbstractClass);
> > ...
> > __PACKAGE__->belongs_to(bar =3D> 'My::DB::Bar');
> > __PACKAGE__->has_many(baz =3D> 'My::DB::Baz');
> >
> > That all works great, but the load_classes method is called for every
> class
> > whenever I 'use My::DB'. I would like the classes to only load when I am
> > going to use them. I have experimented with moving the load_classes
> > definitions into My::DB::Foo etc, and only specifying the current
> > __PACKAGE__ and it's relationships but this results in all relationships
> for
> > My::DB::Foo being loaded when that class is loaded even if they are not
> > going to be used.
> >
> > Is there some way I can load the relation classes only when a call is
> made
> > to the accessor for that relation? I have looked for an answer in the
> docs
> > and in the googles but to no avail.
>
> Not really. The loading time is fairly low if you either (a) have
> Class::C3::XS installed or (b) are on 5.10 (C3 built in)
>
> What business requirement is leading you to want on-demand loading?
>
> --
>      Matt S Trout       Need help with your Catalyst or DBIx::Class
> project?
>   Technical Director
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