What is the hash key 'cb' in: $r->to->(cb=>sub{...})

[Randall Sindlinger]

Hi,

I'm working on code that I inherited, and I've hit something that is opaque to me.

What does this code snip in setup() intend to do, specifically regarding the hash key 'cb'?

      my $authed = $r->under("/$path_base")->to(cb => sub {
              my $c = shift;
              return $c->deny_auth unless $c->auth && $c->authz(role => 'update');
              return 1;
          })->name("authed_select_$name");
      $authed->post->to("$cname#create")->name("create_$name");

The documentation on to() doesn't seem to help here.

I see some references to a $cb value in the bowels of the mojilicious code base, so I'm guessing it's reaching inside to affect behavour somewhere; furthermore, I don't see the hash key cb being used anywhere in the code; only being set during the app setup().

The full code context is at https://github.com/USGCRP/gcis/blob/master/lib/Tuba.pm#L259 , if that's helpful.

Thanks in advance for any insights,
-Randall

[Dan Book]

https://metacpan.org/pod/Mojolicious::Guides::Routing#Route-to-callback

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