Qiita Teams that are logged in
You are not logged in to any team

Log in to Qiita Team
Community
OrganizationAdvent CalendarQiitadon (β)
Service
Qiita JobsQiita ZineQiita Blog
112
Help us understand the problem. What is going on with this article?
@shu_0115

ActiveSupport Time拡張

More than 3 years have passed since last update.

all_〜

  • Rangeオブジェクトを返す
Time.now
 # => 2013-01-23 19:41:24 +0900
Time.now.all_day
 # => 2013-01-23 00:00:00 +0900..2013-01-23 23:59:59 +0900
Time.now.all_week
 # => 2013-01-21 00:00:00 +0900..2013-01-27 23:59:59 +0900
Time.now.all_month
 # => 2013-01-01 00:00:00 +0900..2013-01-31 23:59:59 +0900
Time.now.all_quarter
 # => 2013-01-01 00:00:00 +0900..2013-03-31 23:59:59 +0900
Time.now.all_year
 # => 2013-01-01 00:00:00 +0900..2013-12-31 23:59:59 +0900

〜_ago

  • 指定された過去の日時を返す
Time.now
 # => 2013-01-23 19:45:18 +0900
Time.now.weeks_ago(1)
 # => 2013-01-16 19:44:42 +0900
Time.now.months_ago(1)
 # => 2012-12-23 19:46:08 +0900
Time.now.years_ago(1)
 # => 2012-01-23 19:46:16 +0900
Time.now.ago(1.week)
 # => 2013-01-16 19:46:57 +0900

〜_since

  • 指定された未来の日時を返す
Time.now
 # => 2013-01-23 19:47:54 +0900
Time.now.months_since(1)
 # => 2013-02-23 19:48:19 +0900
Time.now.years_since(1)
 # => 2014-01-23 19:48:42 +0900
Time.now.since(1.month)
 # => 2013-02-23 19:49:08 +0900

beginning_of_〜

  • 指定された日時の始めの日時を返す
Time.now
 # => 2013-01-23 19:53:31 +0900
Time.now.beginning_of_hour
 # => 2013-01-23 19:00:00 +0900
Time.now.beginning_of_day
 # => 2013-01-23 00:00:00 +0900
Time.now.beginning_of_week
 # => 2013-01-21 00:00:00 +0900
Time.now.beginning_of_month
 # => 2013-01-01 00:00:00 +0900
Time.now.beginning_of_quarter
 # => 2013-01-01 00:00:00 +0900
Time.now.beginning_of_year
 # => 2013-01-01 00:00:00 +0900

end_of_〜

  • 指定された日時の終わりの日時を返す
Time.now
 # => 2013-01-01 00:00:00 +0900
Time.now.end_of_hour
 # => 2013-01-23 19:59:59 +0900
Time.now.end_of_day
 # => 2013-01-23 19:56:25 +0900
Time.now.end_of_week
 # => 2013-01-27 23:59:59 +0900
Time.now.end_of_month
 # => 2013-01-31 23:59:59 +0900
Time.now.end_of_quarter
 # => 2013-03-31 23:59:59 +0900
Time.now.end_of_year
 # => 2013-12-31 23:59:59 +0900

next_〜

  • 指定された日時の次の日時を返す
Time.now
 # => 2013-01-23 20:00:30 +0900
Time.now.next_week
 # => 2013-01-28 00:00:00 +0900
Time.now.next_month
 # => 2013-02-23 20:00:45 +0900
Time.now.next_year
 # => 2014-01-23 20:00:53 +0900

prev_〜

  • 指定された日時の前の日時を返す
Time.now
 # => 2013-01-23 20:02:05 +0900
Time.now.prev_week
 # => 2013-01-14 00:00:00 +0900
Time.now.prev_month
 # => 2012-12-23 20:02:59 +0900
Time.now.prev_year
 # => 2012-01-23 20:03:05 +0900

その他

  • 過去判定
Time.now.past?
 # => true
Time.now.since(1.day).past?
 # => false
Time.now.ago(1.day).past?
 # => true
  • 今日判定
Time.now.today?
 # => true
Time.now.ago(1.day).today?
 # => false
Time.now.since(1.day).today?
 # => false
  • 月の日数を返す

days_in_month

Time.days_in_month( 2, 2012 )
 # => 29
Time.days_in_month( 2, 2013 )
 # => 28

※yearは省略可能

Time.days_in_month( 2 )
 # => 28
112
Help us understand the problem. What is going on with this article?
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
shu_0115
Web Engineer

Comments

No comments
Sign up for free and join this conversation.
Sign Up
If you already have a Qiita account Login
112
Help us understand the problem. What is going on with this article?