From: Nanfang Zhao <zhao@...>
Date: 2009-03-07T00:55:00+09:00
Subject: Re: Proper way to include module methods with dynamic code?

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Methods in module will become the instance methods of the class which
includes this module.
make sure your  before_filter is running properly, and @klass is defined.


On Fri, Mar 6, 2009 at 9:25 AM, Web Manager <webmanager@aibs.org> wrote:

> Hi,
>
> (This is in a Rails context, but I believe is much more of a Ruby
> question so is posted here.)
>
> I've got an index method with some dynamic bits I'd like to place into a
> module and include in several controllers:
>
> module MyApp::ListsControllerIndex
>  def index
>    self.instance_variable_set( "@#{@models_str}", @klass.find(:all) )
>
>    respond_to do |format|
>      format.html do
>        render 'shared/lists_index'
>      end
>    end
>  end # End index
> end # End module
>
> (The instance variables @models_str and @klass are set by a
> before_filter in the controller.)
>
> When I try to include this module into controllers via any combination
> of include or extend, I either get:
>
> 1) a nil.find error as Ruby seems to try and execute/resolve @klass in
> @klass.find when included rather than after the filters have run (seen
> with include)
> 2) the included method is not found (seen with extend)
>
> What I'd like is the method to be added to my controller class and be
> sitting ready and waiting to evaluate the dynamic bits when called.  (Or
> said another way, for the included method to work successfully the same
> way it does when it's defined directly in the controller or a superclass
> of the controller.)
>
> I've read through include/extend docs but clearly need some additional
> help.  Any is much appreciated and thanks for your time!
>
> Cheers.
> --
> Posted via http://www.ruby-forum.com/.
>
>

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