Module | ActiveRecord::Timestamp
In: | lib/active_record/timestamp.rb

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`. This behavior by default uses local time, but can use UTC by setting `ActiveRecord::Base.default_timezone = :utc`

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