# App.pm:
$r->route('/page/:id')
  ->name('page_show')
  ->to( controller => 'page', action => 'show' );

# Page.pm:
sub show {
    my $c = shift;
    warn 'has_data: '. $c->validation->has_data . ' id: ' . $c->param('id');
    ...
}

Request to "/page/99" prints:
has_data:  id: 1 at /home/dan/uc2/script/../lib/App/Page.pm line 26.