From: dblack@...
Date: 2006-10-26T11:01:56+09:00
Subject: Re: Calling functions in a child class

Hi --

On Thu, 26 Oct 2006, Brian Schlect wrote:

> I have a class:
>
> class alpha
> def test_method
>  puts "test method"
> end
>
> def get_methods
>  puts alpha.methods
> end
> end

It's a little unclear what you're doing here.  "class alpha" won't
parse (alpha isn't a constant), and since test_method is not defined
as a class method, it won't appear when you do alpha.methods.

> running "get_methods" here will return a long list of methods including
> test_method. But, I also have this class:
>
> class bravo < alpha
> def another_test_method
> end
> end
>
> i want to be able to call get_methods in the parent class and have it
> return the functions of the child class as well. so in this example:
>
> test_obj = bravo.new
> bravo.get_methods
>
> would return all methods including
>
> test_method
> another_test_method

See if this does what you need:

   class Alpha
     def test_method
     end

     def get_methods
       p self.class.instance_methods.sort  # for easy viewing :-)
     end
   end

   Alpha.new.get_methods

   class Bravo < Alpha
     def another_test_method
     end
   end

   Bravo.new.get_methods


David

-- 
                   David A. Black | dblack@wobblini.net
Author of "Ruby for Rails"   [1] | Ruby/Rails training & consultancy [3]
DABlog (DAB's Weblog)        [2] | Co-director, Ruby Central, Inc.   [4]
[1] http://www.manning.com/black | [3] http://www.rubypowerandlight.com
[2] http://dablog.rubypal.com    | [4] http://www.rubycentral.org