gistfile1

# To Audit Foo model, create a model called Foo::BarLog with a foreign key of bar_id and include this concern

module Auditable
  extend ActiveSupport::Concern

  included do
    after_save :audit
    has_many :audits, class_name: "#{self}Log"
  end

  module InstanceMethods
    def audit
      foreign_key = self.class.name.foreign_key
      "#{self.class.name}Log".constantize.create self.serializable_hash.except("id").merge({"#{foreign_key}" => self.id})
    end
  end
end