1MooseX::Param(3)      User Contributed Perl Documentation     MooseX::Param(3)
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NAME

6       MooseX::Param - Simple role to provide a standard param method
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SYNOPSIS

9         package My::Template::System;
10         use Moose;
11
12         with 'MooseX::Param';
13
14         # ...
15
16         my $template = My::Template::System->new(
17             params => {
18                 foo => 10,
19                 bar => 20,
20                 baz => 30,
21             }
22         );
23
24         # fetching params
25         $template->param('foo'); # 10
26
27         # getting list of params
28         $template->param(); # foo, bar, baz
29
30         # setting params
31         $template->param(foo => 30, bar => 100);
32

DESCRIPTION

34       This is a very simple Moose role which provides a CGI like "param"
35       method.
36
37       I found that I had written this code over and over and over and over
38       again, and each time it was the same. So I thought, why not put it in a
39       role?
40

ATTRIBUTES

42       params
43           This role provides a "params" attribute which has a read-only
44           accessor, and a HashRef type constraint. It also adds a builder
45           method (see "init_params" method below) to properly initalize it.
46

METHODS

48       params
49           Return the HASH ref in which the parameters are stored.
50
51       param
52           This is your standard CGI style "param" method. If passed no
53           arguments, it will return a list of param names. If passed a single
54           name argument it will return the param associated with that name.
55           If passed a key value pair (or set of key value pairs) it will
56           assign them into the params.
57
58       init_params
59           This is the params attribute "builder" option, so it is called the
60           params are initialized.
61
62           NOTE: You can override this by defining your own version in your
63           class, because local class methods beat role methods in
64           composition.
65
66       meta
67           Returns the role metaclass.
68

SIMILAR MODULES

70       The "param" method can be found in several other modules, such as CGI,
71       CGI::Application and HTML::Template to name a few. This is such a
72       common Perl idiom that I felt it really deserved it's own role (if for
73       nothing more than I was sick of re-writing and copy-pasting it all the
74       time).
75
76       There are also a few modules which attempt to solve the same problem as
77       this module. Those are:
78
79       Class::Param
80           This module is much more ambitious than mine, and provides much
81           deeper functionality. For most of my purposes, this module would
82           have been overkill, but if you need really sophisticated param
83           handling and the ability to provide several different APIs (tied,
84           etc), this module is probably the way to go.
85
86       Mixin::ExtraFields::Param
87           This module is very similar to mine, but for a different framework.
88           It works with the Mixin::ExtraFields framework.
89

BUGS

91       All complex software has bugs lurking in it, and this module is no
92       exception. If you find a bug please either email me, or add the bug to
93       cpan-RT.
94

AUTHOR

96       Stevan Little <stevan@iinteractive.com>
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99       Copyright 2007 by Infinity Interactive, Inc.
100
101       <http://www.iinteractive.com>
102
103       This library is free software; you can redistribute it and/or modify it
104       under the same terms as Perl itself.
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108perl v5.36.0                      2023-01-20                  MooseX::Param(3)
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