From: Gregory Seidman <gsslist+ruby@...>
Date: 2006-06-08T22:40:36+09:00
Subject: Re: Using a string to find a class

On Thu, Jun 08, 2006 at 11:38:42AM +0900, Daniel N wrote:
[...]
} 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

Both #camelize and #constantize are Rails extensions.

} Hope this works for you
--Greg

} 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
} >
} >
} 
}