71 lines
2.6 KiB
Ruby
71 lines
2.6 KiB
Ruby
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module ActiveRecord
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# Active Record automatically timestamps create and update operations if the table has fields
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# named created_at/created_on or updated_at/updated_on.
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#
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# Timestamping can be turned off by setting
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# <tt>ActiveRecord::Base.record_timestamps = false</tt>
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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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# <tt>ActiveRecord::Base.default_timezone = :utc</tt>
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module Timestamp
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def self.included(base) #:nodoc:
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base.alias_method_chain :create, :timestamps
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base.alias_method_chain :update, :timestamps
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base.class_inheritable_accessor :record_timestamps, :instance_writer => false
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base.record_timestamps = true
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end
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# Saves the record with the updated_at/on attributes set to the current time.
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# If the save fails because of validation errors, an ActiveRecord::RecordInvalid exception is raised.
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# If an attribute name is passed, that attribute is used for the touch instead of the updated_at/on attributes.
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#
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# Examples:
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#
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# product.touch # updates updated_at
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# product.touch(:designed_at) # updates the designed_at attribute
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def touch(attribute = nil)
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current_time = current_time_from_proper_timezone
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if attribute
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write_attribute(attribute, current_time)
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else
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write_attribute('updated_at', current_time) if respond_to?(:updated_at)
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write_attribute('updated_on', current_time) if respond_to?(:updated_on)
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end
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save!
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end
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private
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def create_with_timestamps #:nodoc:
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if record_timestamps
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current_time = current_time_from_proper_timezone
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write_attribute('created_at', current_time) if respond_to?(:created_at) && created_at.nil?
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write_attribute('created_on', current_time) if respond_to?(:created_on) && created_on.nil?
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write_attribute('updated_at', current_time) if respond_to?(:updated_at) && updated_at.nil?
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write_attribute('updated_on', current_time) if respond_to?(:updated_on) && updated_on.nil?
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end
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create_without_timestamps
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end
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def update_with_timestamps(*args) #:nodoc:
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if record_timestamps && (!partial_updates? || changed?)
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current_time = current_time_from_proper_timezone
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write_attribute('updated_at', current_time) if respond_to?(:updated_at)
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write_attribute('updated_on', current_time) if respond_to?(:updated_on)
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end
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update_without_timestamps(*args)
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end
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def current_time_from_proper_timezone
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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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