Remove bits about go/visit as they are in 5.71, clean up / rewrite some of the points

[catagits/Catalyst-Runtime.git] / lib / Catalyst / Delta.pod

=head1 Deltachanges from 5.7 to 5.8

This is an overview of the user visible changes in 5.8

=head2 Deprecations

::[MVC]:: style naming scheme has been deprecated and will warn


 - Use Class::C3::Adopt::NEXT (rafl)

Catalyst 5.80 uses L<Algorithm::C3> method dispatch order. This is built into
perl 5.10 (new pragma mro), and comes via L<Class::C3> for perl 5.8. This
replaces L<NEXT> with L<Class::C3::Adopt::NEXT>, forcing all components to
resolve methods using C3, rather than the unpredictable dispatch order of
L<NEXT>. Please "use MRO::Compat" in both perl 5.8 and perl 5.10 to activate
this feature.
- Disallow writing to config after setup and disallow calling setup more 
than once (rafl)

=head2 Dispatcher

Fix forwarding to Catalyst::Action objects (Rafael Kitover).

=head2 Restarter

The development server restarter has been improved to be compatible with
immutable Moose classes, and also to optionally use 
L<B::Hooks::OP::Check::StashChange> to handle more complex application layouts
correctly.

=head2 $c->uri_for_action method. (hdp)

A private path to the Catalyst action you want to create a URI for.
This is a shortcut for calling C<< $c->dispatcher->get_action_by_path($path) >>
and passing the resulting C<$action> and the remaining arguments to 
C<< $c->uri_for >>.

=head2 Logging

Log levels have been madeadditive, and add documentation to the setup_log 
method.

=head2 Consequences of the Moose backend

        - Use MooseX::MethodAttributes::Inheritable to contain action
          attributes. This means that attributes are now represented in the MOP,
          allowing method modifiers on actions to work as expected. (rafl)
        - Provide a reasonable API in Catalyst::Controller for working with
          and registering actions, allowing a controller sub-class to replace
          subroutine attributes for action declerations with an alternate
          syntax. (rafl/hdp)
        - Refactor capturing of $app from Catalyst::Controller into
          Catalyst::Component::ApplicationAttribute for easier reuse in other
          components (Florian Ragwitz)
        - Make MyApp immutable at the end of the scope after the setup
          method is called, fixing issues with plugins which have their 
          own new methods by inlining a constructor on MyApp (t0m)        
        - Instantiate correct sub-class of Moose::Meta::Class for non-Moose
          components where Catalyst forces the creation of a metaclass instance.
 
=head2 Test Suite

        - Change Catalyst::Test to use Sub::Exporter (Florian Ragwitz).
        - Port to Moose
        - Support mocking virtualhosts in test suite ()
        - Add methods like action_ok and action_redirect to write
          more compact tests

=head2 Catalyst::Response->print()

Prints @data to the output stream, separated by $,.  This lets you pass
the response object to functions that want to write to an L<IO::Handle>.