[Catalyst] Regex dispatch type is deprecated

[Dmitry Karasik]

John,

Thank you very much! That was exactly what I needed

On Tue, Jul 07, 2015 at 06:51:08PM +0000, John Napiorkowski wrote:
> Dmitry,
> 
> You can use the Regexp Dispatcher on CPAN, for legacy code.  There is no plan to stop supporting it, unless we hit a point where we can't support it when making required fixes to Catalyst.  I just wanted to remove it from Catalyst core such as to emphasis its no longer the approved approach and prevent people from writing new code with it.
> 
> If you are using the newest Catalyst, we added Type Constraint matching to Args and this should let you dispatch on regexp types in a very similar manner.  Take a look at 
> 
> 
> https://metacpan.org/pod/distribution/Catalyst-Runtime/lib/Catalyst/RouteMatching.pod#Using-type-constraints-in-a-controller
> which has an example of using a regular expression type constraint generator is a way that functions similarly to how the old regexp worked.  For example:
> 
> 
> package MyApp::Controller::User;
> 
> use Moose;
> use MooseX::MethodAttributes;
> use Types::Standard qw/StrMatch/;
> 
> extends 'Catalyst::Controller';
> 
> sub looks_like_a_date :Path('') Args(StrMatch[qr{\d\d-\d\d-\d\d\d\d}]) {
>   my ($self, $c, $date) = @_;
> }
> 
> __PACKAGE__->meta->make_immutable;
> 
> 
> requires a URL like /user/11-11-2222
> That is one approach, or you can create custom ActionRoles for special dispatch rule needs.  In general I think the new feature to add type constraint checks on Args and CaptureArgs gives you everything you had with regexp and more.  Feedback, and bug fix patches welcomed!
> 
> Jnap
> 
> 
> 
> On Tuesday, July 7, 2015 10:42 AM, Dmitry Karasik <dmitry at karasik.eu.org> wrote:
> 
> 
> 
> Hello all,
> 
> I'm upgrading an older Catalyst installation, and re-writing code that uses
> Regex/LocalRegex dispatchers. The rewriting is mostly for routes such as
> Regex('a-(\d+)-(\d+).png'), and I'm writing new code which basically does the
> same, but using :Args(1), manually matching the last part of url, and detaching
> to new route with matched parameters. This is not a problem, but I'm thinking
> that I must be not the only one having the same problem, and there must be a
> module on CPAN that dispatches execution using regexes, as a replacement. But
> Catalyst::DispatchType::Regex that seems to be the offical replacement, warns about the
> Regex/LocalRegex attributes are deprecated, which is confusing to me -- the
> feature was removed from the core, okay, but I still want to use it through a
> separate module, why then warn about deprecation again?
> 
> So basically my question is, what's the best recommended way to rewrite
> requests such as a-2-3.png, for example? Or, how could I rewrite these requests
> with chaining? 
> 
> -- 
> Thank you,
>     Dmitry Karasik
> 
> 
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-- 
Sincerely,
	Dmitry Karasik