[Catalyst] [PATCH] Catalyst::View::Mason : add render() method to use several templates

José AUGUSTE-ETIENNE jose.auguste-etienne at cgss-guyane.fr
Wed Jun 15 20:18:47 CEST 2005

Hello Catalysters,

First of all thanks for the great work.

I've discovered Catalyst a few days ago,
but as I could'nt find a solution to my problem using the released code,
I think that the attached patch may be useful to others.
I'm currently porting a Apache/HTML::Mason Webapp to Catalyst,
and I need to do something like this :

all pages share the same global page template,
let's call it 'page.mason',
and it looks like this

( snip HTML & CSS begin code  ... )
<div id="left_margin">
	<% $c->stash->{left_margin} %>

<div id="center">
	<% $c->stash->{center} %>

<div id="right_margin">
	<% $c->stash->{right_margin} %>
( snip HTML end code  ... )

$c->stash->{left_margin}, $c->stash->{center},
$c->stash->{right_margin}, etc 
are set via the page Controller,
by rendering specific templates

package MyApp::C::MyPage;

use strict;
use base 'Catalyst::Base';

sub begin : Private {
    my ( $self, $c ) = @_;
    unless ($c->stash->{my_app_config}) {
	$c->stash->{my_app_config} = MyApp::M::Config->getConfig;

sub center : Private {
    my ( $self, $c ) = @_;
    $c->stash->{template} = 'mypage_center.mason';
    $c->stash->{center} = $c->forward(qw/MyApp::V::Mason render/);

sub right_margin : Private {
    my ( $self, $c ) = @_;
    $c->stash->{template} = 'mypage_right.mason';
    $c->stash->{right_margin} = $c->forward(qw/MyApp::V::Mason render/);

sub left_margin : Private {
    my ( $self, $c ) = @_;
    $c->stash->{template} = 'mypage_left.mason';
    $c->stash->{left_margin} = $c->forward(qw/MyApp::V::Mason render/);

sub default : Private {
    my ( $self, $c ) = @_;
    $c->stash->{template} = 'page.mason';
    $c->stash->{title} = "My page";

I had to use a new method, because Catalyst::View::Mason::process()
defaults to render to $c->response->body, 
and I didn't find an alternate way to avoid it.

please let me know if there is an alternate solution.

with this patch, Catalyst::View::Mason::render()
returns the result of the template processing,
instead of Catalyst::View::Mason::process(),
and Catalyst::View::Mason::process(),
renders the return value of Catalyst::View::Mason::render()
to $c->response->body

patch is against Rev 835

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