Rails - Jul 2006 - Injecting actions into controllers

Hi,

I''m trying to write a plugin that should inject an action into the
controller.
Please note, not just an instance method, but also an _action_, one of those
that are listable by running ControllerClassName.action_methods.

I wrote the following code:

def render_field_search(name, object, controller, options = {})
  controller.class.class_eval do
    define_method("#{name}_flt") {
      raise ''Here iam!''
    }
  end

  # this should define the new method as an action too
  controller.class.action_methods << "#{name}_flt"
  [..]
end

It works if I try to call the method from inside render_field_search() itself,
it fails if I call it as normal HTTP request:

ActionController::UnknownAction
  (No action responded to reservation_customer_id_flt):

/actionpack-1.12.3/lib/action_controller/filters.rb:368:
  in `perform_action_without_benchmark''


Does anyone know why this happens?

Thanks.

Cheers,
Marco

Keywords for future searches:
inject action method controller plugin class_eval eval

On 24/07/06, Marco Lazzeri <marco.lazzeri@gmail.com>
wrote:
> I''m trying to write a plugin that should inject an action into the
controller.
> Please note, not just an instance method, but also an _action_, one of
those
> that are listable by running ControllerClassName.action_methods.
>
[..]
>
> It works if I try to call the method from inside render_field_search()
itself,
> it fails if I call it as normal HTTP request:
The problem should be that for every requests a new instance of the
controller is created. So the changes made by class_eval and
define_method are lost. I''m trying to workaround the issue defining a
class method, but now the question is:

  Can I call a Controller class method from an HTTP request?

and

  How can I call a Controller class method from an HTTP request?

Marco