Rails - Apr 2006 - Mixin variables

I''ve created an access control module that I''m including in
several
different controllers.  Everything works fine, but I want to allow each 
controller to override the default login page with something like this:

set_login_pages :secure => ''my_login''

In my module, I''ve set up the set_login_pages method like this:

  def self.included(base)
    base.extend(ClassMethods)
  end

  module ClassMethods
    def set_login_pages(*login_page_list)
      @login_pages = login_page_list
    end
  end

But then when I try to access @login pages in the require_user method, 
it''s blank.

What am I doing wrong?

-- 
Posted via http://www.ruby-forum.com/.

Hi --

On Wed, 19 Apr 2006, Will Emigh wrote:
> I''ve created an access control module that I''m including
in several
> different controllers.  Everything works fine, but I want to allow each
> controller to override the default login page with something like this:
>
> set_login_pages :secure => ''my_login''
>
> In my module, I''ve set up the set_login_pages method like this:
>
>  def self.included(base)
>    base.extend(ClassMethods)
>  end
>
>  module ClassMethods
>    def set_login_pages(*login_page_list)
>      @login_pages = login_page_list
>    end
>  end
>
> But then when I try to access @login pages in the require_user method,
> it''s blank.
>
> What am I doing wrong?
The @login_pages instance variable you''re creating belongs to the
class object that''s getting extended.  That has no effect on the
@login_pages belonging to any *instance* of that class.

Here''s a little demo that shows you the difference:

module M
   def self.included(base)
     base.extend(ClassMethods)
   end

   module ClassMethods
     def m
       puts "I am #{self}"
       @var = 1
     end
   end
end

class C
   include M
   m
   puts "I too am #{self}"
   puts "My @var is #{@var}"

   def inst
     puts "I am an instance of C"
     puts "My @var is #{@var}"
   end
end

C.new.inst


David

-- 
David A. Black (dblack@wobblini.net)
Ruby Power and Light, LLC (http://www.rubypowerandlight.com)

"Ruby for Rails" PDF now on sale!  http://www.manning.com/black
Paper version coming in early May!

I tried the same thing with a class variable instead and had the same
problem.  Is there a better way to do this?

-- Will

unknown wrote:
> The @login_pages instance variable you''re creating belongs to the
> class object that''s getting extended.  That has no effect on the
> @login_pages belonging to any *instance* of that class.
-- 
Posted via http://www.ruby-forum.com/.

Hi --

On Wed, 19 Apr 2006, Will Emigh wrote:
> I tried the same thing with a class variable instead and had the same
> problem.  Is there a better way to do this?
Can you post a mock-up of how you''d like to use it in application
code?


David
>
> -- Will
>
> unknown wrote:
>
>> The @login_pages instance variable you''re creating belongs to
the
>> class object that''s getting extended.  That has no effect on
the
>> @login_pages belonging to any *instance* of that class.
>
> -- 
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>
-- 
David A. Black (dblack@wobblini.net)
Ruby Power and Light, LLC (http://www.rubypowerandlight.com)

"Ruby for Rails" PDF now on sale!  http://www.manning.com/black
Paper version coming in early May!

I want my controller to look like this:

class MyController < ApplicationController
  include AccessControl

  before_filter :require_login
  set_login_pages :index => ''my_login''

  def index
  end

  def normal
  end

end

require_login and set_login pages are defined in AccessControl. 
require_login checks to see if they''re logged in and redirects to a 
login page if not.  When redirecting, it checks @@login_pages to see if 
the requested page has an alternate login.  However, @@login_pages is 
blank when require_login checks it (even if set_login_pages has stored 
something in it).

-- Will

unknown wrote:
> On Wed, 19 Apr 2006, Will Emigh wrote:
> 
>> I tried the same thing with a class variable instead and had the same
>> problem.  Is there a better way to do this?
> 
> Can you post a mock-up of how you''d like to use it in application
> code?
> 
> 
> David
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