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module DateAndTime::Calculations

Constants

DAYS_INTO_WEEK

{
sunday: 0,
monday: 1,
tuesday: 2,
wednesday: 3,
thursday: 4,
friday: 5,
saturday: 6
}

WEEKEND_DAYS

[ 6, 0 ]

Public instance methods

after?(date_or_time)

Returns true if the date/time falls after date_or_time.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 72
def after?(date_or_time)
  self > date_or_time
end

all_day()

Returns a Range representing the whole day of the current date/time.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 310
def all_day
  beginning_of_day..end_of_day
end

all_month()

Returns a Range representing the whole month of the current date/time.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 321
def all_month
  beginning_of_month..end_of_month
end

all_quarter()

Returns a Range representing the whole quarter of the current date/time.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 326
def all_quarter
  beginning_of_quarter..end_of_quarter
end

all_week(start_day = Date.beginning_of_week)

Returns a Range representing the whole week of the current date/time. Week starts on start_day, default is Date.beginning_of_week or config.beginning_of_week when set.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 316
def all_week(start_day = Date.beginning_of_week)
  beginning_of_week(start_day)..end_of_week(start_day)
end

all_year()

Returns a Range representing the whole year of the current date/time.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 331
def all_year
  beginning_of_year..end_of_year
end

at_beginning_of_month()

Alias for: beginning_of_month.

at_beginning_of_quarter()

Alias for: beginning_of_quarter.

at_beginning_of_week(start_day = Date.beginning_of_week)

Alias for: beginning_of_week.

at_beginning_of_year()

Alias for: beginning_of_year.

at_end_of_month()

Alias for: end_of_month.

at_end_of_quarter()

Alias for: end_of_quarter.

at_end_of_week(start_day = Date.beginning_of_week)

Alias for: end_of_week.

at_end_of_year()

Alias for: end_of_year.

before?(date_or_time)

Returns true if the date/time falls before date_or_time.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 67
def before?(date_or_time)
  self < date_or_time
end

beginning_of_month()

Also aliased as: at_beginning_of_month.

Returns a new date/time at the start of the month.

today = Date.today # => Thu, 18 Jun 2015
today.beginning_of_month # => Mon, 01 Jun 2015

DateTime objects will have a time set to 0:00.

now = DateTime.current # => Thu, 18 Jun 2015 15:23:13 +0000
now.beginning_of_month # => Mon, 01 Jun 2015 00:00:00 +0000
Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 125
def beginning_of_month
  first_hour(change(day: 1))
end

beginning_of_quarter()

Also aliased as: at_beginning_of_quarter.

Returns a new date/time at the start of the quarter.

today = Date.today # => Fri, 10 Jul 2015
today.beginning_of_quarter # => Wed, 01 Jul 2015

DateTime objects will have a time set to 0:00.

now = DateTime.current # => Fri, 10 Jul 2015 18:41:29 +0000
now.beginning_of_quarter # => Wed, 01 Jul 2015 00:00:00 +0000
Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 139
def beginning_of_quarter
  first_quarter_month = month - (2 + month) % 3
  beginning_of_month.change(month: first_quarter_month)
end

beginning_of_week(start_day = Date.beginning_of_week)

Also aliased as: at_beginning_of_week.

Returns a new date/time representing the start of this week on the given day. Week is assumed to start on start_day, default is Date.beginning_of_week or config.beginning_of_week when set. DateTime objects have their time set to 0:00.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 267
def beginning_of_week(start_day = Date.beginning_of_week)
  result = days_ago(days_to_week_start(start_day))
  acts_like?(:time) ? result.midnight : result
end

beginning_of_year()

Also aliased as: at_beginning_of_year.

Returns a new date/time at the beginning of the year.

today = Date.today # => Fri, 10 Jul 2015
today.beginning_of_year # => Thu, 01 Jan 2015

DateTime objects will have a time set to 0:00.

now = DateTime.current # => Fri, 10 Jul 2015 18:41:29 +0000
now.beginning_of_year # => Thu, 01 Jan 2015 00:00:00 +0000
Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 179
def beginning_of_year
  change(month: 1).beginning_of_month
end

days_ago(days)

Returns a new date/time the specified number of days ago.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 77
def days_ago(days)
  advance(days: -days)
end

days_since(days)

Returns a new date/time the specified number of days in the future.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 82
def days_since(days)
  advance(days: days)
end

days_to_week_start(start_day = Date.beginning_of_week)

Returns the number of days to the start of the week on the given day. Week is assumed to start on start_day, default is Date.beginning_of_week or config.beginning_of_week when set.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 258
def days_to_week_start(start_day = Date.beginning_of_week)
  start_day_number = DAYS_INTO_WEEK.fetch(start_day)
  (wday - start_day_number) % 7
end

end_of_month()

Also aliased as: at_end_of_month.

Returns a new date/time representing the end of the month. DateTime objects will have a time set to 23:59:59.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 296
def end_of_month
  last_day = ::Time.days_in_month(month, year)
  last_hour(days_since(last_day - day))
end

end_of_quarter()

Also aliased as: at_end_of_quarter.

Returns a new date/time at the end of the quarter.

today = Date.today # => Fri, 10 Jul 2015
today.end_of_quarter # => Wed, 30 Sep 2015

DateTime objects will have a time set to 23:59:59.

now = DateTime.current # => Fri, 10 Jul 2015 18:41:29 +0000
now.end_of_quarter # => Wed, 30 Sep 2015 23:59:59 +0000
Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 154
def end_of_quarter
  last_quarter_month = month + (12 - month) % 3
  beginning_of_month.change(month: last_quarter_month).end_of_month
end

end_of_week(start_day = Date.beginning_of_week)

Also aliased as: at_end_of_week.

Returns a new date/time representing the end of this week on the given day. Week is assumed to start on start_day, default is Date.beginning_of_week or config.beginning_of_week when set. DateTime objects have their time set to 23:59:59.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 283
def end_of_week(start_day = Date.beginning_of_week)
  last_hour(days_since(6 - days_to_week_start(start_day)))
end

end_of_year()

Also aliased as: at_end_of_year.

Returns a new date/time representing the end of the year. DateTime objects will have a time set to 23:59:59.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 304
def end_of_year
  change(month: 12).end_of_month
end

future?()

Returns true if the date/time is in the future.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 52
def future?
  self > self.class.current
end

last_month()

Short-hand for months_ago(1).

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 240
def last_month
  months_ago(1)
end

last_quarter()

Alias for: prev_quarter.

last_week(start_day = Date.beginning_of_week, same_time: false)

Alias for: prev_week.

last_weekday()

Alias for: prev_weekday.

last_year()

Short-hand for years_ago(1).

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 251
def last_year
  years_ago(1)
end

monday()

Returns Monday of this week assuming that week starts on Monday. DateTime objects have their time set to 0:00.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 275
def monday
  beginning_of_week(:monday)
end

months_ago(months)

Returns a new date/time the specified number of months ago.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 97
def months_ago(months)
  advance(months: -months)
end

months_since(months)

Returns a new date/time the specified number of months in the future.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 102
def months_since(months)
  advance(months: months)
end

next_day?()

Alias for: tomorrow?.

next_occurring(day_of_week)

Returns a new date/time representing the next occurrence of the specified day of week.

today = Date.today               # => Thu, 14 Dec 2017
today.next_occurring(:monday)    # => Mon, 18 Dec 2017
today.next_occurring(:thursday)  # => Thu, 21 Dec 2017
Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 340
def next_occurring(day_of_week)
  from_now = DAYS_INTO_WEEK.fetch(day_of_week) - wday
  from_now += 7 unless from_now > 0
  advance(days: from_now)
end

next_quarter()

Short-hand for months_since(3).

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 215
def next_quarter
  months_since(3)
end

next_week(given_day_in_next_week = Date.beginning_of_week, same_time: false)

Returns a new date/time representing the given day in the next week.

today = Date.today # => Thu, 07 May 2015
today.next_week    # => Mon, 11 May 2015

The given_day_in_next_week defaults to the beginning of the week which is determined by Date.beginning_of_week or config.beginning_of_week when set.

today = Date.today       # => Thu, 07 May 2015
today.next_week(:friday) # => Fri, 15 May 2015

DateTime objects have their time set to 0:00 unless same_time is true.

now = DateTime.current # => Thu, 07 May 2015 13:31:16 +0000
now.next_week      # => Mon, 11 May 2015 00:00:00 +0000
Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 200
def next_week(given_day_in_next_week = Date.beginning_of_week, same_time: false)
  result = first_hour(weeks_since(1).beginning_of_week.days_since(days_span(given_day_in_next_week)))
  same_time ? copy_time_to(result) : result
end

next_weekday()

Returns a new date/time representing the next weekday.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 206
def next_weekday
  if next_day.on_weekend?
    next_week(:monday, same_time: true)
  else
    next_day
  end
end

on_weekday?()

Returns true if the date/time does not fall on a Saturday or Sunday.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 62
def on_weekday?
  !WEEKEND_DAYS.include?(wday)
end

on_weekend?()

Returns true if the date/time falls on a Saturday or Sunday.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 57
def on_weekend?
  WEEKEND_DAYS.include?(wday)
end

past?()

Returns true if the date/time is in the past.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 47
def past?
  self < self.class.current
end

prev_day?()

Alias for: yesterday?.

prev_occurring(day_of_week)

Returns a new date/time representing the previous occurrence of the specified day of week.

today = Date.today               # => Thu, 14 Dec 2017
today.prev_occurring(:monday)    # => Mon, 11 Dec 2017
today.prev_occurring(:thursday)  # => Thu, 07 Dec 2017
Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 351
def prev_occurring(day_of_week)
  ago = wday - DAYS_INTO_WEEK.fetch(day_of_week)
  ago += 7 unless ago > 0
  advance(days: -ago)
end

prev_quarter()

Also aliased as: last_quarter.

Short-hand for months_ago(3).

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 245
def prev_quarter
  months_ago(3)
end

prev_week(start_day = Date.beginning_of_week, same_time: false)

Also aliased as: last_week.

Returns a new date/time representing the given day in the previous week. Week is assumed to start on start_day, default is Date.beginning_of_week or config.beginning_of_week when set. DateTime objects have their time set to 0:00 unless same_time is true.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 223
def prev_week(start_day = Date.beginning_of_week, same_time: false)
  result = first_hour(weeks_ago(1).beginning_of_week.days_since(days_span(start_day)))
  same_time ? copy_time_to(result) : result
end

prev_weekday()

Also aliased as: last_weekday.

Returns a new date/time representing the previous weekday.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 230
def prev_weekday
  if prev_day.on_weekend?
    copy_time_to(beginning_of_week(:friday))
  else
    prev_day
  end
end

quarter()

Returns the quarter for a date/time.

Date.new(2010, 1, 31).quarter  # => 1
Date.new(2010, 4, 12).quarter  # => 2
Date.new(2010, 9, 15).quarter  # => 3
Date.new(2010, 12, 25).quarter # => 4
Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 166
def quarter
  (month / 3.0).ceil
end

sunday()

Returns Sunday of this week assuming that week starts on Monday. DateTime objects have their time set to 23:59:59.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 290
def sunday
  end_of_week(:monday)
end

today?()

Returns true if the date/time is today.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 30
def today?
  to_date == ::Date.current
end

tomorrow()

Returns a new date/time representing tomorrow.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 25
def tomorrow
  advance(days: 1)
end

tomorrow?()

Also aliased as: next_day?.

Returns true if the date/time is tomorrow.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 35
def tomorrow?
  to_date == ::Date.current.tomorrow
end

weeks_ago(weeks)

Returns a new date/time the specified number of weeks ago.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 87
def weeks_ago(weeks)
  advance(weeks: -weeks)
end

weeks_since(weeks)

Returns a new date/time the specified number of weeks in the future.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 92
def weeks_since(weeks)
  advance(weeks: weeks)
end

years_ago(years)

Returns a new date/time the specified number of years ago.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 107
def years_ago(years)
  advance(years: -years)
end

years_since(years)

Returns a new date/time the specified number of years in the future.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 112
def years_since(years)
  advance(years: years)
end

yesterday()

Returns a new date/time representing yesterday.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 20
def yesterday
  advance(days: -1)
end

yesterday?()

Also aliased as: prev_day?.

Returns true if the date/time is yesterday.

Source code GitHub 
# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 41
def yesterday?
  to_date == ::Date.current.yesterday
end

Definition files