Catalyst

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Catalyst is a web application framework. I do all of my web stuff using it nowadays. --Jhannah 11:37, 1 April 2008 (CDT)

Catalyst Workshop

Contents

How to call Actions

(Actions are Perl subs (methods) with special Catalyst magic on top.)

These do the same thing, for the most part? Best practice / recommendations, anyone? 

$c->forward('MyController', 'MyMethod');          forward()    
$c->forward('/MyController/MyMethod');

$c->controller('MyController')->MyMethod($c);     controller()
                                        ^^^^  Don't forget to pass $c!

$c->controller('MyController')->action_for('MyMethod');
$c->forward($c->controller('MyController')->action_for('MyMethod'));

If you're feeling really saucy, an alternate bleeding edge thing is Catalyst::Component::ACCEPT_CONTEXT

Returning multiple values

From: Sean Baker
Date: Tue, 1 Apr 2008 15:26:42 -0500
Subject: returning multiple values when using Catalyst forward or controller

In Catalyst land, when calling a method that returns multiple values:
 
This works:
 
($response,$success) = $c->controller("OWS")->UpdateQuestion($c);
 
This does not:
 
($response, $success) = $c->forward(“OWS”,”UpdateQuestion”);

Everything is an Action?

12:10 < rdj> jhannah: I'm not sure "everything-is-an-action" is common or
             recommended.
12:14 < jhannah> rdj: I'm not sure what the alternative to
                 "everything-is-an-action" is. All our subs are Actions, but maybe
                 that's Bad(tm).
12:20 < rdj> jhannah: I'm fairly new, so probably not the best to expound on it, I
             did everything-as-an-action at first as well. But two things dissuaded
             me:
12:20 < rdj> jhannah: (1) $c->forward swallows exceptions
12:21 < rdj> jhannah: (2) The action table when starting the dev server just gets
             huge.
12:22 < Caelum> there's a MortalForward plugin if you don't like the exception
                swallowing :)
12:22 < rdj> yeah, it's very new

Patching Catalyst

# Grab the thing you want to patch
$ svn co http://dev.catalyst.perl.org/repos/Catalyst/trunk/Catalyst-Plugin-FillInForm
# And an example that actually has some tests...
$ svn co http://dev.catalyst.perl.org/repos/Catalyst/trunk/Catalyst-Plugin-SubRequest

Then bug marcus in irc.perl.org #catalyst. He'll commit and release.

As far as the CPAN overhead goes, Module::Install is the place to start learning the standard CPAN toolchain.

The wiki is: http://catwiki.toeat.com/, not Trac apparently.

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