Help us understand the problem. What is going on with this article?

#Rails ( or #Ruby + ActiveSupport ) : Time.zone.now VS Time.current what is difference? when specify Time.zone then used ActiveSupport::TimeWithZone class else use Time class

require 'active_support/core_ext'


# No Time.zone setting

Time.use_zone(nil) { Time.current }
# => 2019-11-29 07:38:04 +0900

Time.use_zone(nil) { Time.current.class }
# => Time



# with Time.zone setting
# Time.current class changed Time to ActiveSupport::TimeWithZone

Time.use_zone('UTC') { Time.current }
# => Thu, 28 Nov 2019 22:38:20 UTC +00:00

Time.use_zone('UTC') { Time.current.class }
# => ActiveSupport::TimeWithZone

Time.use_zone('UTC') { Time.zone.now }
# => Thu, 28 Nov 2019 22:38:26 UTC +00:00

Time.use_zone('UTC') { Time.zone.now.class }
# => ActiveSupport::TimeWithZone



require 'active_support/testing/time_helpers'
include ActiveSupport::Testing::TimeHelpers

# Freeze time
Time.use_zone('UTC') { travel_to Time.parse('2020-01-01 00:00') }

Time.use_zone('UTC') { Time.current == Time.zone.now }
# => true


# NOTE
# Time.parse class not changed to ActiveSupport::TimeWithZone

Time.parse('2020-01-01 00:00')
# => 2020-01-01 00:00:00 +0900

Time.parse('2020-01-01 00:00').class
# => Time

Time.use_zone('UTC') { Time.zone.parse('2020-01-01 00:00') }
# => Wed, 01 Jan 2020 00:00:00 UTC +00:00

Time.use_zone('UTC') { Time.zone.parse('2020-01-01 00:00').class }
# => ActiveSupport::TimeWithZone

Original by Github issue

https://github.com/YumaInaura/YumaInaura/issues/2778

Why not register and get more from Qiita?
  1. We will deliver articles that match you
    By following users and tags, you can catch up information on technical fields that you are interested in as a whole
  2. you can read useful information later efficiently
    By "stocking" the articles you like, you can search right away
Comments
No comments
Sign up for free and join this conversation.
If you already have a Qiita account
Why do not you register as a user and use Qiita more conveniently?
You need to log in to use this function. Qiita can be used more conveniently after logging in.
You seem to be reading articles frequently this month. Qiita can be used more conveniently after logging in.
  1. We will deliver articles that match you
    By following users and tags, you can catch up information on technical fields that you are interested in as a whole
  2. you can read useful information later efficiently
    By "stocking" the articles you like, you can search right away
ユーザーは見つかりませんでした