Delegate Rerouting to Controller - mojolicious

Question

Mojolicious + Hypnotoad.
I want my controllers to reroute the remaining portion of the request, so that I don't have to declare all routes at the level of the main script.
So for example, '/foo/bar/baz' should route to Controller 'FOO', which will then decide routing for 'bar/baz', internal to itself.
Main script :
package MyApp;
use Mojo::Base 'Mojolicious';
use Mojolicious::Plugin::Config;
sub startup {
my $self = shift;
$self->moniker('MyApp');
$self->plugin('Config');
my $r = $self->routes;
$r->any('/foo/*remainder')->to('FOO#rerouter')->name('TEST_NAME');
}
I've tried one way, by dynamically adding routes, but running it many times shows inconsistency - probably caused by a race condition or something :
package MyApp::Controller::FOO;
use Mojo::Base 'Mojolicious::Controller';
sub rerouter {
my $self = shift;
my $r = Mojolicious::Routes->new;
$r->get('bar/:baz')->to('myInternalControllerAction');
my $current_route = $self->current_route; # 'TEST_NAME'
$self->app->routes->find($current_route)->add_child($r);
}
sub myInternalControllerAction { #stuff }
That seems consistent with this other answer that :
"The router is dynamic until the first request has been served, after
that, the router cannot change routes"
https://stackoverflow.com/a/22291864/2304437
Even if that did work though, the execution would exit the controller FOO before re-entering it on a different action via the dynamically added route(s).
The other way I can do it is just create a dispatch table in the "re-router" of the controller, since I have access to the remainder of the request anyway :
sub rerouter {
my $self = shift;
my $remainder = $self->stash->{remainder};
# ...
}
But then I lose benefits of Mojolicious' dispatcher - I would have to parse the remaining request URL / path myself. Feels dirty.
Hooks don't seem appropriate here either.
How can I elegantly let the controller route its own child portion ?

Answer 1

I solved this as follows :
use MyApp::Controller::FOO;
my $r = $self->routes;
my $r_root = $r->under('/' => sub { return 1; });
my $baz = $r_root->under('/baz' => sub { return 1; });
$baz->add_child($MyApp::Controller::FOO::routes);
Then in the module :
package MyApp::Controller::FOO;
use Mojo::Base 'Mojolicious::Controller';
our $routes = Mojolicious::Routes->new;
my $r = $routes->under('/')->to('FOO#bar');
sub bar { ... }
Maybe not as elegant as it could be, but it works very well for me.