moose::cookbook::extending::mooseish_moosesugar5.18(3) [mojave man page]

Moose::Cookbook::Extending::Mooseish_MooseSugar(3)	User Contributed Perl Documentation	Moose::Cookbook::Extending::Mooseish_MooseSugar(3)

NAME

       Moose::Cookbook::Extending::Mooseish_MooseSugar - Acting like Moose.pm and providing sugar Moose-style

VERSION

       version 2.1202

SYNOPSIS

	 package MyApp::Mooseish;

	 use Moose::Exporter;

	 Moose::Exporter->setup_import_methods(
	     with_meta	     => ['has_table'],
	     class_metaroles => {
		 class => ['MyApp::Meta::Class::Trait::HasTable'],
	     },
	 );

	 sub has_table {
	     my $meta = shift;
	     $meta->table(shift);
	 }

	 package MyApp::Meta::Class::Trait::HasTable;
	 use Moose::Role;

	 has table => (
	     is  => 'rw',
	     isa => 'Str',
	 );

DESCRIPTION

       This recipe expands on the use of Moose::Exporter we saw in Moose::Cookbook::Extending::ExtensionOverview and the class metaclass trait we
       saw in Moose::Cookbook::Meta::Table_MetaclassTrait. In this example we provide our own metaclass trait, and we also export a "has_table"
       sugar function.

       The "with_meta" parameter specifies a list of functions that should be wrapped before exporting. The wrapper simply ensures that the
       importing package's appropriate metaclass object is the first argument to the function, so we can do "my $meta = shift;".

       See the Moose::Exporter docs for more details on its API.

USING MyApp::Mooseish
       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 namespace::autoclean;

	 use Moose;
	 use MyApp::Mooseish;

	 has_table 'User';

	 has 'username' => ( is => 'ro' );
	 has 'password' => ( is => 'ro' );

	 sub login { ... }

CONCLUSION

       Providing sugar functions can make your extension look much more Moose-ish. See Fey::ORM for a more extensive example.

AUTHORS

       o   Stevan Little <stevan.little@iinteractive.com>

       o   Dave Rolsky <autarch@urth.org>

       o   Jesse Luehrs <doy@tozt.net>

       o   Shawn M Moore <code@sartak.org>

       o   XXXX XXX'XX (Yuval Kogman) <nothingmuch@woobling.org>

       o   Karen Etheridge <ether@cpan.org>

       o   Florian Ragwitz <rafl@debian.org>

       o   Hans Dieter Pearcey <hdp@weftsoar.net>

       o   Chris Prather <chris@prather.org>

       o   Matt S Trout <mst@shadowcat.co.uk>

COPYRIGHT AND LICENSE

       This software is copyright (c) 2006 by Infinity Interactive, Inc..

       This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

perl v5.18.2							    2014-01-19			Moose::Cookbook::Extending::Mooseish_MooseSugar(3)

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Moose::Cookbook::Meta::Recipe4(3)			User Contributed Perl Documentation			 Moose::Cookbook::Meta::Recipe4(3)

NAME

       Moose::Cookbook::Meta::Recipe4 - Adding a "table" attribute to the metaclass

VERSION

       version 2.0205

SYNOPSIS

	 package MyApp::Meta::Class;
	 use Moose;
	 extends 'Moose::Meta::Class';

	 has table => (
	     is  => 'rw',
	     isa => 'Str',
	 );

DESCRIPTION

       In this recipe, we'll create a new metaclass which has a "table" attribute. This metaclass is for classes associated with a DBMS table, as
       one might do for an ORM.

       In this example, the table name is just a string, but in a real ORM the table might be an object describing the table.

THE METACLASS

       This really is as simple as the recipe "SYNOPSIS" shows. The trick is getting your classes to use this metaclass, and providing some sort
       of sugar for declaring the table. This is covered in Moose::Cookbook::Extending::Recipe2, which shows how to make a module like "Moose.pm"
       itself, with sugar like "has_table()".

   Using this Metaclass in Practice
       Accessing this new "table" attribute is quite simple. Given a class named "MyApp::User", we could simply write the following:

	 my $table = MyApp::User->meta->table;

       As long as "MyApp::User" has arranged to use "MyApp::Meta::Class" as its metaclass, this method call just works. If we want to be more
       careful, we can check the metaclass's class:

	 $table = MyApp::User->meta->table
	     if MyApp::User->meta->isa('MyApp::Meta::Class');

CONCLUSION

       Creating custom metaclass is trivial. Using it is a little harder, and is covered in other recipes. We will also talk about applying traits
       to a class metaclass, which is a more flexible and cooperative implementation.

SEE ALSO

       Moose::Cookbook::Meta::Recipe5 - The "table" attribute implemented as a metaclass trait

       Moose::Cookbook::Extending::Recipe2 - Acting like Moose.pm and providing sugar Moose-style

AUTHOR

       Stevan Little <stevan@iinteractive.com>

COPYRIGHT AND LICENSE

       This software is copyright (c) 2011 by Infinity Interactive, Inc..

       This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

perl v5.12.5							    2011-09-06					 Moose::Cookbook::Meta::Recipe4(3)

Linux and UNIX Man Pages

moose::cookbook::extending::mooseish_moosesugar5.18(3) [mojave man page]

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