From: Stefano Crocco <stefano.crocco@...>
Date: 2008-04-14T21:37:44+09:00
Subject: Re: Dynamically referring to a Class

On Monday 14 April 2008, Gaudi Mi wrote:
> I have several classes in my application, e.g. Person, Employer, Office.
> And obviously I have some Class methods for each, e.g. Person.find.
>
> At one point in my application I will be referencing the Class name
> dynamically, I will have it in a String.  So e.g. class = "Person".  I
> want to send the Person class the 'find' message (call Person.find).
> How do I do this in Ruby.  I've scoured the API and Google but it's a
> hard thing to search for.
>
> Thanks.

Object.const_get(cls).find

If the class is defined in a module, replace Object with the name of the 
module. For example:

module M
  class C
    def self.find
    end
  end
end

M.const_get('C').find

I hope this helps

Stefano