From: kris <krisleech@...>
Date: 2006-04-10T22:29:38+09:00
Subject: Re: Adding in class attribute with a Module

Thanks very much for all the examples. I think I need to clarify, 
basically I have a base class called "System" from which all my models 
decend. This class has a class attribute called user_id which is set to 
the current_user every request by application.rb:

BASE MODEL CLASS
class System < ActiveRecord::Base
  cattr_accessor :user_id
end

MODEL
class Documents < System
  # this model know the current user's id
end

APPLICATION CONTROLLER
class ApplicationController < ActionController::Base
   before_filter :set_user

  # set class attribute for all models
  def set_user
    if logged_in?
      System.user_id = current_user.id
    end
  end
end


By using a class attribute instead of a instance attribute I can set the 
current user id for all models at once.

This works but I want to use a module/mixin instead of inheritance.

Many thanks again.

PS. I didnt write cattr_accessor. I'm using Rails but I dont think it is 
opart of that?

unknown wrote:
> Hi --
> 
> On Mon, 10 Apr 2006, kris wrote:
> 
>> Is it possible to add class attributes (cattr_accessor) using a module?
>> If so could you give an example?
> 
> There's no cattr_accessor method in Ruby.  If you've written one, or
> are using one written by someone else, you'll have to show us what it
> does before we can tell you how to use it :-)
> 
> 
> David
> 
> --
> David A. Black (dblack@wobblini.net)
> Ruby Power and Light, LLC (http://www.rubypowerandlight.com)
> 
> "Ruby for Rails" coming in PDF April 15, and in paper May 1!
> http://www.manning.com/black


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