X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?p=catagits%2FCatalyst-Manual.git;a=blobdiff_plain;f=lib%2FCatalyst%2FManual%2FActions.pod;h=41247c8e2c80961a32dc6a82e67333e2e100d64e;hp=461945e263efb665cc7aaa53c9e9f327f7fee577;hb=09455dbadf8e85c4d3499986575b2733d2cf1204;hpb=e91e320be26db95fc1bfdee31436cdbc09899cf7 diff --git a/lib/Catalyst/Manual/Actions.pod b/lib/Catalyst/Manual/Actions.pod index 461945e..41247c8 100644 --- a/lib/Catalyst/Manual/Actions.pod +++ b/lib/Catalyst/Manual/Actions.pod @@ -5,16 +5,17 @@ Catalyst::Manual::Actions - Catalyst Reusable Actions =head1 DESCRIPTION This section of the manual describes the reusable action system in -Catalyst, how they work, descriptions of some existing ones, and how to -write your own. Reusable actions are attributes on Catalyst methods -that allow you to decorate your method with functions running before or -after the method call. This can be used to implement commonly used -action patterns, while still leaving you full freedom to customize them. +Catalyst, how such actions work, descriptions of some existing ones, and +how to write your own. Reusable actions are attributes on Catalyst +methods that allow you to decorate your method with functions running +before or after the method call. This can be used to implement commonly +used action patterns, while still leaving you full freedom to customize +them. =head1 USING ACTIONS -This is pretty simple. It works just like the normal dispatch attributes -you are used to, like Local or Private: +This is pretty simple. Actions work just like the normal dispatch +attributes you are used to, like Local or Private: sub Hello :Local :ActionClass('SayBefore') { $c->res->output( 'Hello '.$c->stash->{what} ); @@ -22,10 +23,11 @@ you are used to, like Local or Private: In this example, we expect the SayBefore action to magically populate stash with something relevant before C is run. In the next -section we'll show you how to implement it. If you want it in another -namespace than Catalyst::Action you can prefix the action name with a -'+', for instance '+Foo::SayBefore', or if you just want it under your -application namespace instead, use MyAction, like MyAction('SayBefore'). +section we'll show you how to implement it. If you want it in a +namespace other than Catalyst::Action you can prefix the action name +with a '+', for instance '+Foo::SayBefore', or if you just want it under +your application namespace instead, use MyAction, like +MyAction('SayBefore'). =head1 WRITING YOUR OWN ACTIONS @@ -33,23 +35,63 @@ Implementing the action itself is almost as easy. Just use L as a base class and decorate the C call in the Action class: - package Catalyst::Action::SayBefore; + package Catalyst::Action::MyAction; + use Moose; + use namespace::autoclean; + + extends 'Catalyst::Action'; - use base 'Catalyst::Action'; + before 'execute' => sub { + my ( $self, $controller, $c, $test ) = @_; + $c->stash->{what} = 'world'; + }; + + after 'execute' => sub { + my ( $self, $controller, $c, $test ) = @_; + $c->stash->{foo} = 'bar'; + }; + + __PACKAGE__->meta->make_immutable; + +Pretty simple, huh? - sub execute { - my $self = shift; - my ( $controller, $c, $test ) = @_; +=head1 ACTION ROLES + +You can only have one action class per action, which can be somewhat +inflexible. + +The solution to this is to use L, which +would make the example above look like this: + + package Catalyst::ActionRole::MyActionRole; + use Moose::Role; + + before 'execute' => sub { + my ( $self, $controller, $c, $test ) = @_; $c->stash->{what} = 'world'; - $self->next::method( @_ ); }; + after 'execute' => sub { + my ( $self, $controller, $c, $test ) = @_; + $c->stash->{foo} = 'bar'; + }; + 1; -If you want to do something after the action, just put it after the -C call. Pretty simple, huh? +and this would be used in a controller like this: -=head1 ACTIONS + package MyApp::Controller::Foo; + use Moose; + use namespace::autoclean; + BEGIN { extends 'Catalyst::Controller::ActionRole'; } + + sub foo : Does('MyActionRole') { + my ($self, $c) = @_; + } + + 1; + +=head1 EXAMPLE ACTIONS =head2 Catalyst::Action::RenderView @@ -57,11 +99,24 @@ This is meant to decorate end actions. It's similar in operation to L, but allows you to decide on an action level rather than on an application level where it should be run. -=head1 AUTHOR +=head2 Catalyst::Action::REST + +Provides additional syntax for dispatching based upon the HTTP method +of the request. -The Catalyst Core Team - see http://catalyst.perl.org/ +=head1 EXAMPLE ACTIONROLES + +=head2 Catalyst::ActionRole::ACL + +Provides ACLs for role membership by decorating your actions. + +=head1 AUTHORS + +Catalyst Contributors, see Catalyst.pm =head1 COPYRIGHT -This program is free software. You can redistribute it and/or modify it -under the same terms as Perl itself. +This library is free software. You can redistribute it and/or modify it under +the same terms as Perl itself. + +=cut