[Catalyst] calling detach within begin

[Jim Spath]

Kevin Old wrote:
> Hi Jim,
> 
> I'm running into the same situation and wonder if you could elaborate
> on what you are doing in your begin method and/or auto method.
> 
> Here's my begin:
> 
> sub begin : Private {
>     my ( $self, $c ) = @_;
> 
>     [...]
> 
>     if ( $c->stash->{errs} ) {
>         $c->stash->{content} = $c->stash->{errs};
>         $c->stash->{root_name} = 'errors';
>         $c->stash->{key_attr} = 'error';
>         $c->forward('V::XMLSimple');
>         #$c->detach('V::XMLSimple');
>     }
> 
> }
> 
> I'm doing some validation of parameters in my begin method and if
> there are errors I want to immediately break to my XMLSimple view and
> stop processing.
> 
> Thanks for any help with this,
> Kevin
> 
> On Jul 16, 2007 5:42 PM, Jim Spath <jspath at pangeamedia.com> wrote:
>> Jim Spath wrote:
>>> I can't seem to get a detach call within my application's Root begin to
>>> work.  While it does seem to stop processing with the begin method,
>>> Catalyst continues processing whatever action was specified by the request.
>>>
>>> I've looked through the docs and it seems like I might need to use auto()?
>>>
>>> "The auto action is also distinguished by the fact that you can break
>>> out of the processing chain by returning 0. If an auto action returns 0,
>>> any remaining actions will be skipped, except for end."
>>>
>>> Should I create an auto() action and forward to the action I was
>>> previously detaching to, and return 0?
>> I've gone ahead and started returning auto and it appears to work.
>>
>> It might be nice to make a note in the docs somewhere that calling
>> detach in begin might not do what you expect and that returning 0 from
>> auto is what you should be doing.
>>
>>
>> --
>> Jim Spath

Hi Kevin,

I think this should work for you:

sub auto : Private {
   my ($self, $c) = @_;

   [...]

   if ($c->stash->{errs}) {
     $c->stash->{content} = $c->stash->{errs};
     $c->stash->{root_name} = 'errors';
     $c->stash->{key_attr} = 'error';
     $c->forward('V::XMLSimple');
     return 0;
   }

}

- Jim