From: Daniel N <has.sox@...>
Date: 2006-06-08T11:38:42+09:00
Subject: Re: Using a string to find a class

Hi Pat

This ones come up a few times on the list

http://www.ruby-forum.com/topic/66482#80672

is one that I remember particulalry.

Although in some methods that I have seen in the rails source there has been

string_name.camelize.constantize

This will return a class object specified by name.
eg

def do_somthing( class_name )
  obj = class_name.to_s.camelize.constantize
  obj.new
end

Hope this works for you

On 6/8/06, Pat Maddox <pergesu@gmail.com> wrote:
> I've got a string, and I want to find out if there's a class with that
> name.  So something like
>
> class_exists? "Foo"
>
> and then I can eval it if it does, I guess.  Or is there a better way
> than eval in that case?  At any rate, I just want to be able to take a
> string and find out if there's a class with that name or not.
>
> Thanks,
> Pat
>
>