From: Ryan Davis Date: 2008-12-29T16:52:46+09:00 Subject: Re: how to declare model classes in Application.rb On Dec 28, 2008, at 22:20 , Vikas Gholap wrote: > Hello all, > I am new to ruby development. > I created a simple online book store Application. > but when i select book & click on 'add to cart' it gives me error please ask these questions on the ruby on rails mailing list.