[Catalyst] Elegant way to check action presence?

[J. Shirley]

2010/1/9 Alex Povolotsky <tarkhil at over.ru>:
> Hello!
>
> I'm working on a (more or less) flexible system with plugins should be
> installed just like controllers; some basic information about them
> (particulary, numerical id) must be kept in database.
>
> Plugins should be handle some queries in /admin/service/$servicename
>
> I'd like to put 'smart links' in plugin information table - i.e. if
> something handles /admin/service/$servicename/control, link exists; if no -
> instead of link text in different style is presented, telling that plugin
> has not been installed.
>
> construction like
>
> [% SET path=stype.path %]
> [% IF c.can('/admin/service/$path/control') %]
> <a href ... >
> [% ELSE %]
> message here
> [% END %]
>
> is ugly; maybe someone points me to some nicer idea? I was thinking of some
> function in Schema/Result/Servicetype.pm returning link or warning, but how
> do I access the Catalyst object from it? Or I just have to pass it as
> argument?
>
> Alex.
>


The way I did this is using the namespace and action, since the
namespace is configurable.

http://search.cpan.org/~bobtfish/Catalyst-Runtime-5.80016/lib/Catalyst.pm#$c->get_action(_$action,_$namespace_)

If it returns undef, the action doesn't exist in the defined namespace.

-J