101 lines
3.0 KiB
Ruby
101 lines
3.0 KiB
Ruby
require 'active_support/core_ext/class/attribute'
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module ActiveRecord
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# = Active Record Timestamp
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#
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# Active Record automatically timestamps create and update operations if the
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# table has fields named <tt>created_at/created_on</tt> or
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# <tt>updated_at/updated_on</tt>.
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#
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# Timestamping can be turned off by setting:
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#
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# config.active_record.record_timestamps = false
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#
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# Timestamps are in the local timezone by default but you can use UTC by setting:
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#
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# config.active_record.default_timezone = :utc
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#
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# == Time Zone aware attributes
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#
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# By default, ActiveRecord::Base keeps all the datetime columns time zone aware by executing following code.
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#
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# config.active_record.time_zone_aware_attributes = true
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#
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# This feature can easily be turned off by assigning value <tt>false</tt> .
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#
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# If your attributes are time zone aware and you desire to skip time zone conversion to the current Time.zone
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# when reading certain attributes then you can do following:
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#
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# class Topic < ActiveRecord::Base
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# self.skip_time_zone_conversion_for_attributes = [:written_on]
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# end
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module Timestamp
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extend ActiveSupport::Concern
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included do
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class_attribute :record_timestamps, :instance_writer => false
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self.record_timestamps = true
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end
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private
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def create #:nodoc:
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if self.record_timestamps
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current_time = current_time_from_proper_timezone
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all_timestamp_attributes.each do |column|
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write_attribute(column.to_s, current_time) if respond_to?(column) && self.send(column).nil?
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end
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end
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super
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end
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def update(*args) #:nodoc:
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if should_record_timestamps?
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current_time = current_time_from_proper_timezone
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timestamp_attributes_for_update_in_model.each do |column|
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column = column.to_s
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next if attribute_changed?(column)
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write_attribute(column, current_time)
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end
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end
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super
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end
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def should_record_timestamps?
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self.record_timestamps && (!partial_updates? || changed? || (attributes.keys & self.class.serialized_attributes.keys).present?)
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end
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def timestamp_attributes_for_create_in_model
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timestamp_attributes_for_create.select { |c| self.class.column_names.include?(c.to_s) }
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end
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def timestamp_attributes_for_update_in_model
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timestamp_attributes_for_update.select { |c| self.class.column_names.include?(c.to_s) }
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end
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def all_timestamp_attributes_in_model
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timestamp_attributes_for_create_in_model + timestamp_attributes_for_update_in_model
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end
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def timestamp_attributes_for_update #:nodoc:
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[:updated_at, :updated_on]
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end
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def timestamp_attributes_for_create #:nodoc:
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[:created_at, :created_on]
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end
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def all_timestamp_attributes #:nodoc:
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timestamp_attributes_for_create + timestamp_attributes_for_update
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end
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def current_time_from_proper_timezone #:nodoc:
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self.class.default_timezone == :utc ? Time.now.utc : Time.now
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end
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end
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end
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