rails--rails/activerecord/lib/active_record/timestamp.rb

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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.
module Timestamp
def self.append_features(base) # :nodoc:
super
base.before_create :timestamp_before_create
base.before_update :timestamp_before_update
end
def timestamp_before_create
write_attribute("created_at", Time.now) if respond_to?(:created_at) && created_at.nil?
write_attribute("created_on", Time.now) if respond_to?(:created_on) && created_on.nil?
timestamp_before_update
end
def timestamp_before_update
write_attribute("updated_at", Time.now) if respond_to?(:updated_at)
write_attribute("updated_on", Time.now) if respond_to?(:updated_on)
end
end
end