[Catalyst] Why is $c undefined?

[Lukas Thiemeier]

Hi again,

$c is automatically passed to Catalyst-actions  (not methods), but only
if you use Catalyst to do so.

If you call

 $self->someaction;

or

  $c->controller('SomeController')->someaction();

it is not passed. How can catalyst know if you are calling a catalyst
action, or any method on any object? And even if the object is a
catalyst controller, how can catalyst know if it is a action, which
requires the context, or just a helper, which doesn't use the context?

If you want catalyst to pass $c, use $c->forward, $c->detach, $c->visit
and $c->go instead:

  $c->forward("/someaction");

or

  $c->forward($c->controller('MyController')->action_for("someaction"));

or

  $c->forward("/somecontroller/someaction");

Read the main catalyst docs for details. (perldoc Catalyst)

Lukas

On 10/29/2012 08:07 PM, Craig Chant wrote:
> Hi,
> 
>  
> 
> I seem to be unable to work out why $c is never automatically passed to
> any of my models or methods?
> 
>  
> 
> I have in root.pm
> 
>  
> 
> # always runs first!
> 
> sub begin :Private {
> 
>    
> 
>     my ( $self, $c ) = @_;
> 
>  
> 
>     # Authenticate
> 
>     $self->AuthenticateUser();   
> 
>     return 1;
> 
>    
> 
> }
> 
>  
> 
> I then have...
> 
>  
> 
> sub AuthenticateUser {
> 
>    
> 
>     my ( $self, $c ) = @_;   
> 
>     
> 
>     $c->session;
> 
>     if(!$c->model('Members')->LogCheck($c)){
> 
>         $c->uri_for_action('/login/login');
> 
>     }   
> 
>     
> 
> }
> 
>  
> 
> However, $c is undefined and errors, it only works if I pass it $c from
> 'begin'..
> 
>  
> 
>     $self->AuthenticateUser($c);   
> 
>  
> 
>  
> 
> I was under the impression that $c was the context (Catalyst) default
> variable and was always passed to every method / subroutine.
> 
>  
> 
> is this not the case?
> 
>  
> 
> Thanks,
> 
>  
> 
> Craig .
> 
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