module ActiveRecord # Active Records will automatically record creation and/or update timestamps of database objects # if fields of the names created_at/created_on or updated_at/updated_on are present. This module is # automatically included, so you don't need to do that manually. # # This behavior can be turned off by setting ActiveRecord::Base.record_timestamps = false. module Timestamp def self.append_features(base) # :nodoc: super base.class_eval do alias_method :create_without_timestamps, :create alias_method :create, :create_with_timestamps alias_method :update_without_timestamps, :update alias_method :update, :update_with_timestamps end end def create_with_timestamps write_attribute("created_at", Time.now) if record_timestamps && respond_to?(:created_at) && created_at.nil? write_attribute("created_on", Time.now) if record_timestamps && respond_to?(:created_on) && created_on.nil? write_attribute("updated_at", Time.now) if record_timestamps && respond_to?(:updated_at) write_attribute("updated_on", Time.now) if record_timestamps && respond_to?(:updated_on) create_without_timestamps end def update_with_timestamps write_attribute("updated_at", Time.now) if record_timestamps && respond_to?(:updated_at) write_attribute("updated_on", Time.now) if record_timestamps && respond_to?(:updated_on) update_without_timestamps end end class Base # Records the creation date and possibly time in created_on (date only) or created_at (date and time) and the update date and possibly # time in updated_on and updated_at. This only happens if the object responds to either of these messages, which they will do automatically # if the table has columns of either of these names. This feature is turned on by default. @@record_timestamps = true cattr_accessor :record_timestamps end end