# Include this in your classes to get ActiveRecord::Errors functionality.
module Errorable
  
  # Setting errors on attributes will call ActiveRecord::Base.human_attribute_name,
  # so we need to mimic that method on the class that's including this module.
  def self.included(base)
    base.class_eval <<-END
      def self.human_attribute_name(attribute_key_name)
        attribute_key_name.humanize
      end
    END
  end
  
  def errors
    @errors ||= ActiveRecord::Errors.new(self)
  end
  
  def valid?
    errors.length == 0
  end
end