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1 | |
2 | =pod |
3 | |
4 | =head1 NAME |
5 | |
6 | Moose::Cookbook::Meta::Recipe4 - Adding a "table" attribute to the metaclass |
7 | |
8 | =head1 SYNOPSIS |
9 | |
10 | package MyApp::Meta::Class; |
11 | use Moose; |
12 | extends 'Moose::Meta::Class'; |
13 | |
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14 | has table => ( |
15 | is => 'rw', |
16 | isa => 'Str', |
17 | ); |
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18 | |
19 | =head1 DESCRIPTION |
20 | |
21 | In this recipe, we'll create a new metaclass which has a "table" |
22 | attribute. This metaclass is for classes associated with a DBMS table, |
23 | as one might do for an ORM. |
24 | |
25 | In this example, the table name is just a string, but in a real ORM |
26 | the table might be an object describing the table. |
27 | |
28 | =head1 THE METACLASS |
29 | |
30 | The metaclass example really is as simple as the one in the |
31 | synopsis. The trick is getting your classes to use this metaclass, and |
32 | providing some sort of sugar for declaring the table. This is covered |
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33 | in L<Moose::Cookbook::Extending::Recipe2>, which shows how to make a |
34 | module like C<Moose.pm> itself, with sugar like C<has_table()>. |
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35 | |
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36 | =head2 Using this Metaclass in Practice |
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37 | |
38 | Using this new "table" attribute is quite simple. Let's say we have a |
39 | class named C<MyApp::User>, we could simply write the following: |
40 | |
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41 | my $table = MyApp::User->meta->table; |
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42 | |
43 | As long as MyApp::User has arranged to use C<MyApp::Meta::Class> as |
44 | its metaclass, this method call just works. |
45 | |
46 | =head1 SEE ALSO |
47 | |
48 | L<Moose::Cookbook::Meta::Recipe5> - The "table" attribute implemented |
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49 | as a metaclass trait |
50 | |
51 | L<Moose::Cookbook::Extending::Recipe2> - Acting like Moose.pm and |
52 | providing sugar Moose-style |
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53 | |
54 | =head1 AUTHOR |
55 | |
56 | Dave Rolsky E<lt>autarch@urth.orgE<gt> |
57 | |
58 | =head1 COPYRIGHT AND LICENSE |
59 | |
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60 | Copyright 2006-2009 by Infinity Interactive, Inc. |
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61 | |
62 | L<http://www.iinteractive.com> |
63 | |
64 | This library is free software; you can redistribute it and/or modify |
65 | it under the same terms as Perl itself. |
66 | |
67 | =pod |