[Catalyst-dev] Re: [Catalyst] Re: Bug in Catalyst::Model::DBI .15

[Jonathan Rockway]

On Sunday 06 May 2007 04:29:48 am A. Pagaltzis wrote:
> * Evan Carroll <lists at evancarroll.com> [2007-05-06 10:55]:
> > With that said, the patch provided has no drawbacks, and even
> > if you only use the most minimal functionality of M::DBI, with
> > the current code, you don't have a connection until the first
> > ->dbh is called, which is no bueno. (work that is better
> > handled at compile-time)
>
> That is precisely the patch’s drawback. Connecting lazily rather
> than eagerly is a feature.
>
> However, that’s not hard to correct, although the patch would be
> larger: rather than squirreling away a connection in `new`,
> squirrel away a reference to an undef scalar. Then you can assign
> the handle to that scalar, and it will be shared among everyone
> who kept a copy of the same reference.

There's also Scalar::Defer:

   my $connection = defer { DBI->connect ... } ;
   # not connected yet;
   $connection->prepare(...); # bang! connected.

-- 
package JAPH;use Catalyst qw/-Debug/;($;=JAPH)->config(name => do {
$,.=reverse qw[Jonathan tsu rehton lre rekca Rockway][$_].[split //,
";$;"]->[$_].q; ;for 1..4;$,=~s;^.;;;$,});$;->setup;
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