[Catalyst] Forwarding to chained Path fails

[John Napiorkowski]

--- Bernhard Graf <catalyst at augensalat.de> wrote:

> I'm trying Cat's chained paths and I like it quite
> much.
> 
> One thing I recognized is that you can't forward to
> a chained path.
> 
> Take the Hello-World example in
> Catalyst::DispatchType::Chained.
> When I add
> 
>   sub index : Private {
>     my ( $self, $c ) = @_;
>     $c->forward('/hello/47/world/11');
> }

I find it works like this:

Assume that the '/hello/47/world/11' is referring to
an action called 'world' in the current package.

$c->forward(
$c->uri_for($c->controller->action_for('world'),
[47,11] );

But if it's in a different controller you need to
specify the controller name:

$c->forward(
$c->uri_for($c->controller('mycontroller')->action_for('world'),
[47,11] );

I'm pretty sure you can only forward to an endpoint in
the chain (something with 'Args(...)' not
"CaptureArgs(...)".

If the args are already captured in the current action
you can do like:

$c->forward(
$c->uri_for($c->controller->action_for('world'),
$c->captures );

But you need to pass the exactly needed number of
args, if "$c->captures" is an arrayref to three things
you'll need to shorten it with, $c->captures->[0,1] or
whichever are the correct captures.

Check out the docs for $c->uri_for in the main
catalyst docs:

http://search.cpan.org/~mramberg/Catalyst-Runtime-5.7003/lib/Catalyst.pm#%24c-%3Euri_for(_%24path%2C_%40args%3F%2C_%5C%25query_values%3F_)

This is one of the more handy things that showed up
with 5.7 (I think :) ).

--john

> 
> then for http://my.host/greeting I get
> Couldn't forward to command "/hello/47/world/11":
> Invalid action or component.
> 
> Is this a bug or is there a reason why this cannot
> work?
> -- 
> Bernhard Graf
> 
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