Moose::Cookbook::Extending::Recipe4 - Acting like Moose.pm and providing sugar Moose-style
package MyApp::Mooseish; use strict; use warnings; use Moose (); use Moose::Exporter; Moose::Exporter->setup_import_methods( with_caller => ['has_table'], also => 'Moose', ); sub init_meta { shift; Moose->init_meta( @_, metaclass => 'MyApp::Meta::Class' ); } sub has_table { my $caller = shift; $caller->meta()->table(shift); }
This recipe expands on the use of Moose::Exporter we saw in Moose::Cookbook::Extending::Recipe1. Instead of providing our own object base class, we provide our own metaclass class, and we also export a sugar subroutine has_table().
has_table()
Given the above code, you can now replace all instances of use Moose with use MyApp::Mooseish. Similarly, no Moose is now replaced with no MyApp::Mooseish.
use Moose
use MyApp::Mooseish
no Moose
no MyApp::Mooseish
The with_caller parameter specifies a list of functions that should be wrapped before exporting. The wrapper simply ensures that the importing package name is the first argument to the function, so we can do my $caller = shift;.
with_caller
my $caller = shift;
See the Moose::Exporter docs for more details on its API.
The purpose of all this code is to provide a Moose-like interface. Here's what it would look like in actual use:
package MyApp::User; use MyApp::Mooseish; has_table 'User'; has 'username' => ( is => 'ro' ); has 'password' => ( is => 'ro' ); sub login { ... } no MyApp::Mooseish;
All of the normal Moose sugar (has(), with(), etc) is available when you use MyApp::Mooseish.
has()
with()
Dave Rolsky <autarch@urth.org>
Copyright 2006-2008 by Infinity Interactive, Inc.
http://www.iinteractive.com
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
To install Moose, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Moose
CPAN shell
perl -MCPAN -e shell install Moose
For more information on module installation, please visit the detailed CPAN module installation guide.