You can also define your constants in "YourApp/Constants.pl", and "use"
YourApp::Constants wherever you need them.
YourApp/Constants.pm:
use constant { FOO => 1 };
1;
Controller.pm:
use YourApp::Constants;
# and in some method
...
my $global_foo = FOO;
There might be a better way, but this works...
For handling dates, I recommend "DateTime", available on cpan:
Another reason to use DBIC:
DBIx::Class::Inflatecolumn::DateTime automatically transforms dates
stored in a database into a DateTime object, which can be used like this:
my $uk_string = $datetime->dmy('/');
my $us_string = $datetime->ymd('-');
But DateTime is not related to DBIC, DBIC just makes using it easy.
Use it if you have to work with dates a lot. It has lots of methods for
outputting dates, times or both in different formats, and it allows
datetime-math...
On 10/30/2012 03:39 PM, Craig Chant wrote:
> 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/*
>>
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> viruses, any attachments to this e-mail may nevertheless contain viruses,
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> carry out your own anti-virus checks before opening any documents. HomeLoan
> Partnership will not accept any liability for damage caused by computer
> viruses emanating from any attachment or other document supplied with this
> e-mail. HomeLoan Partnership reserves the right to monitor and archive all
> e-mail communications through its network. No representative or employee of
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s the authority to enter into any contract on behalf of HomeLoan Partnership by
email. HomeLoan Partnership is a trading name of H L Partnership Limited,
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