Adding custom validations to active record

[Mauricio_Linhares1 (Maurício Linhares)]

It isn`t include in your case, it`s extend:

include 'custom_validations' class ActiveRecord::Base extend CustomValidations end

Here's a better explanation why -> http://blog.codevader.com/2008/09/27/including-and-extending-modules-in-ruby/