module ActiveRecord # = Active Record \Timestamp # # Active Record automatically timestamps create and update operations if the # table has fields named created_at/created_on or # updated_at/updated_on. # # Timestamping can be turned off by setting: # # config.active_record.record_timestamps = false # # Timestamps are in UTC by default but you can use the local timezone by setting: # # config.active_record.default_timezone = :local # # == Time Zone aware attributes # # Active Record keeps all the datetime and time columns # timezone aware. By default, these values are stored in the database as UTC # and converted back to the current Time.zone when pulled from the database. # # This feature can be turned off completely by setting: # # config.active_record.time_zone_aware_attributes = false # # You can also specify that only datetime columns should be time-zone # aware (while time should not) by setting: # # ActiveRecord::Base.time_zone_aware_types = [:datetime] # # You can also add database specific timezone aware types. For example, for PostgreSQL: # # ActiveRecord::Base.time_zone_aware_types += [:tsrange, :tstzrange] # # Finally, you can indicate specific attributes of a model for which time zone # conversion should not applied, for instance by setting: # # class Topic < ActiveRecord::Base # self.skip_time_zone_conversion_for_attributes = [:written_on] # end module Timestamp extend ActiveSupport::Concern included do class_attribute :record_timestamps self.record_timestamps = true end def initialize_dup(other) # :nodoc: super clear_timestamp_attributes end private def _create_record if self.record_timestamps current_time = current_time_from_proper_timezone all_timestamp_attributes.each do |column| column = column.to_s if has_attribute?(column) && !attribute_present?(column) write_attribute(column, current_time) end end end super end def _update_record(*args, touch: true, **options) if touch && should_record_timestamps? current_time = current_time_from_proper_timezone timestamp_attributes_for_update_in_model.each do |column| column = column.to_s next if attribute_changed?(column) write_attribute(column, current_time) end end super(*args) end def should_record_timestamps? self.record_timestamps && (!partial_writes? || changed?) end def timestamp_attributes_for_create_in_model timestamp_attributes_for_create.select { |c| self.class.column_names.include?(c.to_s) } end def timestamp_attributes_for_update_in_model timestamp_attributes_for_update.select { |c| self.class.column_names.include?(c.to_s) } end def all_timestamp_attributes_in_model timestamp_attributes_for_create_in_model + timestamp_attributes_for_update_in_model end def timestamp_attributes_for_update [:updated_at, :updated_on] end def timestamp_attributes_for_create [:created_at, :created_on] end def all_timestamp_attributes timestamp_attributes_for_create + timestamp_attributes_for_update end def max_updated_column_timestamp(timestamp_names = timestamp_attributes_for_update) timestamp_names .map { |attr| self[attr] } .compact .map(&:to_time) .max end def current_time_from_proper_timezone self.class.default_timezone == :utc ? Time.now.utc : Time.now end # Clear attributes and changed_attributes def clear_timestamp_attributes all_timestamp_attributes_in_model.each do |attribute_name| self[attribute_name] = nil clear_attribute_changes([attribute_name]) end end end end