From: Chris Shea <cmshea@...>
Date: 2007-02-23T06:40:10+09:00
Subject: Re: Best way to get a class object from its name?

On Feb 22, 2:21 pm, Wes Gamble <w...@att.net> wrote:
> All,
>
> In my Rails app., I'm doing something like this:
>
> eval("#{requested_controller_class}.respond_to?('session_data_not_needed_by?')")
>
> where requested_controller_class is the name of an existing (controller)
> class.
>
> Is the above code the best of way of invoking respond_to? on the class
> in question, or is there some better way to get the actual class object
> based solely on it's name?
>
> Thanks,
> Wes
>
> --
> Posted viahttp://www.ruby-forum.com/.

Getting class objects was one of the problems in Ruby Quiz #113.  See:
http://www.ruby-forum.com/topic/97203 or
http://groups.google.com/group/comp.lang.ruby/browse_thread/thread/90223b4082d864fa/

There are a couple of solutions given.  Assuming your class name is in
the variable named 'quiz' this (from James II) does it:
quiz.split("::").inject(Object) { |par, const| par.const_get(const) }