[Catalyst] Can't seem to use forward or detach. Any special requirements?

[Tomas Doran]

kakimoto at tpg.com.au wrote:
>   The app works fine except that I have set up an eval block within my
> controller.
>   My detach call comes right after the redirect call.
> 
>   It looks like this:
> 
>             $c->res->redirect($c->uri_for('/users/subscriptions/added '));
>             $c->detach ();
> 
>    What's weird is that on my terminal, the catalyst debug messages
> extract reads:
> 
> [debug] User subscription (id, 1278) updated in database.
> [debug]  update: trapped exception - catalyst_detach
>  
>    Any idea as to what this means?

$c->detach works by throwing an exception, whos contents are 
$Catalyst::DETACH (which is the string 'catalyst_detach').

Therefore, if you call $c->detach inside an eval block of your own, then 
you'll end up catching the exception, which is, I guess, what is 
happening here.

Don't do that :)

Call $c->detach outside of your eval block and Catalyst will catch the 
exception, and everything will be fine.

Another thought - what does $c->detach() do / what do you expect it to 
do? If you aren't detaching _to somewhere_, then why not just return?

Cheers
t0m