gistfile1.pl

use CatalystX::Declare;
namespace MyApp::Web::Controller;
controller ::API::Photos {
    extends 'Catalyst::Controller::DBIC::API::REST';
    $CLASS->config(
        default => 'text/xml',
        class => 'Schema::Photo',
        page_arg => 'page',
        count_arg => 'count',
        ordered_by_arg => 'sort',
        search_arg => 'search',
        prefetch_arg => 'prefetch',
        ordered_by => {-asc=>'title'},
        prefetch_allows => [qw/keywords_photo_rs/],
        page => 1,
        count => 25,
        'map' => {
            'text/xml' => 'XML::Simple',
        },
    );

    action setup
    under '/api/api_base' 
    as 'photos';

    around item($ctx) {
        $self->$orig($ctx);
        my $url = $ctx->uri_for_action(
            '/api/keywords/list_objects', {
                'search.keyword_photos_rs.fk_photo_id' => $ctx->stash->{response}->{data}->{photo_id},
        });
        $ctx->stash->{response}->{keywords} = {href=>"$url"};
    }
}