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Moose::Cookbook::Meta::Recipe4.3pm
Langue: en
Version: 2008-08-29 (ubuntu - 08/07/09)
Section: 3 (Bibliothèques de fonctions)
Sommaire
NAME
Moose::Cookbook::Meta::Recipe4 - Adding a "table" attribute to the metaclassSYNOPSIS
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
The metaclass example really is as simple as the one in the synopsis. 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
Using this new ``table'' attribute is quite simple. Let's say we have 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.
SEE ALSO
Moose::Cookbook::Meta::Recipe5 - The ``table'' attribute implemented as a metaclass traitMoose::Cookbook::Extending::Recipe2 - Acting like Moose.pm and providing sugar Moose-style
AUTHOR
Dave Rolsky <autarch@urth.org>COPYRIGHT AND LICENSE
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.
Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre