Ruby 2.5 series Ruby on Rails 5.2 series
In Rails, the timezone of the time stamp issued by ActiveRecord is defined in config/application.rb.
# config/application.rb Rails.application.configure do config.active_record.default_timezone = :local # (ActiveRecord::Base.default_timezone = :Synonymous with local) Omission end
What this: local refers to is the ruby process timezone.
The ruby process timezone looks at the environment variable
TZ defined in the OS.
In other words, if you don't set this environment variable, ActiveRecord will issue a timestamp with the default UTC.
For example, if you define as follows, created_at and updated_at will be the time in Tokyo.
Speaking of time zones set in Rails, I think that there are also the following people.
Rails.application.configure do config.time_zone = 'Tokyo' end
This is a setting that allows you to set the time zone acquired by
Time.zone to Tokyo.
You can get the current time in Tokyo by hitting
Time.zone.now on the application.