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Railsのタイムゾーンを日本時間にする

Posted at

##はじめに
RailsではデフォルトのタイムゾーンはUTC(協定時)となっています。
そのため、created_atメソッドupdated_atメソッドを使って時間を表示させてみると、
現日本時刻の9時間前になっており2019-01-13 11:28:49 UTCといったようなUTCの表記があるかと思います。

この表記を、日本時間に合わせたいと思います。
##手順
config/application.rbファイルの、Applicationクラスにのなかにタイムゾーンの設定を追加する。
設定はconfig.time_zone = 'Tokyo'

config/application.rb
require_relative 'boot'

require 'rails/all'

# Require the gems listed in Gemfile, including any gems
# you've limited to :test, :development, or :production.
Bundler.require(*Rails.groups)

module App
  class Application < Rails::Application
    # Settings in config/environments/* take precedence over those specified here.
    # Application configuration should go into files in config/initializers
    # -- all .rb files in that directory are automatically loaded.
  end
end
config/application.rb
module App
  class Application < Rails::Application
    # Settings in config/environments/* take precedence over those specified here.
    # Application configuration should go into files in config/initializers
    # -- all .rb files in that directory are automatically loaded.
    config.time_zone = 'Tokyo'
  end
end

上記の設定が完了したら、一度アプリケーションを落とし再起動させます。

以上で時間表示が、2019-01-13 20:28:49 +0900といったような+0900が表示されれば完了です。

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