From: Brian Candler <B.Candler@...>
Date: 2007-03-26T03:49:37+09:00
Subject: Re: class methods and instance variables in ActiveRecord::Base

On Mon, Mar 26, 2007 at 03:45:10AM +0900, zig wrote:
> OK, I think I've got it now.  Class methods of the class have access
> to class variables, class instance variables, but not instance
> variables.  Instance methods of the class have access to class
> variables, instance variables, but not class instance variables.
> Class variables are accessible to both, but neither class instance
> variables nor instance variables are.  Therefore class instance
> variables are not the same thing as class variables.

Also: class variables are also accessible to subclasses.

Class instance variables belong only to one class. For them, a subclass is a
completely different class object.

Regards,

Brian.