Well I opted for putting my globals (methods and constants) in MyApp.pm It's working grand with $c->myMethod or $c->MY_CONSTANT
I use to have them working as a bareword within my application , but $c->MY_CONSTANT is just as easy! Many thanks for all the input and help, it really is appreciated. -----Original Message----- From: Lukas Thiemeier [mailto:spamcatc...@thiemeier.net] Sent: 30 October 2012 13:56 To: catalyst@lists.scsys.co.uk Subject: Re: [Catalyst] Global 'helper' methods Hi Craig, Writing helpers in your main App.pm and using roles is not either-or. Roles are one possibility to modify your classes in a reusable way. If your helpers are really global, which means that they are used by all, or almost all your controllers, I would put them into your main application class. If you have more than one application which make use of the same helpers: Put them into a role: YourHelperRole.pm: package YourHelperRole; use Moose::Role; has "some_attribute" => ( ... ); # if you need attributes sub helpermethod1{ my ($self, $other, $args) = @_; do_something(); } sub helpermethod2{ my ($self, $other, $args) = @_; do_something_different(); } no Moose::Role; # or use namespace::autoclean or MooseX::MarkAsMethod 1; App.pm: use Catalyst qw( ... ); extends "Catalyst"; with qw/YourHelperRole/; ... In my opinion, extending your main App.pm with roles is only useful if you need the same helpers in different locations, too. If you only need them for that single application, avoid the overhead related to using roles. If you have helpers which are only needed by some controllers, create a role for your controllers. You can not only implement helpers in you roles, you can also create method-modifiers, which change the way your methods behave. Here is an example, which writes sth to the log, after the "delete" method was called: YourLogRole.pm: package YourLogRole; use Moose::Role; requires qw/delete/; #die if the consuming class has no "delete" after "delete" => sub{ my ($self, $c) = @_; $c->log->debug("DELETE called"); }; no Moose::Role; 1; Controller1.pm: (has the helpers, but no logging) package Controller1; use Moose; extends "Catalyst::Controller"; with qw/ YourHelperRole /; sub someaction :Local { my ($self, $c) =@_; $self->helpermethod1(); } ... Controller2.pm: (has helpers AND logging) package Controller2; use Moose; extends "Catalyst::Controller"; with qw/ YourLogRole YourHelperRole /; sub delete :Local :Args(1) { ... } Controller3.pm (has logging, but no helpers) package Controller3; use Moose; extends "Catalyst::Controller"; with qw/ YourLogRole /; sub delete :Local :Args(1) { ... } Roles are very powerful tools. I use them a lot. Read the Moose docs for more information. If you don't want to learn Moose, roles and so on now, just remember: 1. write sth in a role 2. consume the role in a moose class, using "with" 3. your roles methods and attributes will be available in the consuming class Lukas On 10/30/2012 02:03 PM, Craig Chant wrote: > Hi, > > > > Please could you advise the best way of having a global 'helper' class > that has all commonly used methods in it accessible for any part of > the catalyst app. > > > > I found this thread > http://stackoverflow.com/questions/11941836/catalyst-global-subroutine > s > > > > With one indicating it's ok to put them in the main MyApp.pm and > another saying to use Moose & Roles. > > > > What is considered the correct way and could you provide an example of > how I create this helper class and bolt it to the Catalyst application. > > > > Many thanks, > > > > */Craig Chant/* > > I.T. 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