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module ActiveSupport #:nodoc:
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module CoreExtensions #:nodoc:
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# Enables the use of time calculations within Date itself
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def self.included(base) #:nodoc:
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base.extend ClassMethods
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alias_method :plus_without_duration, :+
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alias_method :+, :plus_with_duration
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alias_method :minus_without_duration, :-
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alias_method :-, :minus_with_duration
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# Returns a new Date representing the date 1 day ago (i.e. yesterday's date).
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::Date.today.yesterday
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# Returns a new Date representing the date 1 day after today (i.e. tomorrow's date).
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# Returns Time.zone.today when config.time_zone is set, otherwise just returns Date.today.
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::Time.zone_default ? ::Time.zone.today : ::Date.today
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# Tells whether the Date object's date lies in the past
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# Tells whether the Date object's date is today
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self.to_date == ::Date.current # we need the to_date because of DateTime
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# Tells whether the Date object's date lies in the future
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# Converts Date to a Time (or DateTime if necessary) with the time portion set to the beginning of the day (0:00)
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# and then subtracts the specified number of seconds
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to_time.since(-seconds)
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# Converts Date to a Time (or DateTime if necessary) with the time portion set to the beginning of the day (0:00)
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# and then adds the specified number of seconds
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to_time.since(seconds)
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# Converts Date to a Time (or DateTime if necessary) with the time portion set to the beginning of the day (0:00)
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alias :midnight :beginning_of_day
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alias :at_midnight :beginning_of_day
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alias :at_beginning_of_day :beginning_of_day
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# Converts Date to a Time (or DateTime if necessary) with the time portion set to the end of the day (23:59:59)
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def plus_with_duration(other) #:nodoc:
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if ActiveSupport::Duration === other
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plus_without_duration(other)
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def minus_with_duration(other) #:nodoc:
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if ActiveSupport::Duration === other
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plus_with_duration(-other)
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minus_without_duration(other)
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# Provides precise Date calculations for years, months, and days. The +options+ parameter takes a hash with
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# any of these keys: <tt>:years</tt>, <tt>:months</tt>, <tt>:weeks</tt>, <tt>:days</tt>.
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d = d >> options.delete(:years) * 12 if options[:years]
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d = d >> options.delete(:months) if options[:months]
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d = d + options.delete(:weeks) * 7 if options[:weeks]
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d = d + options.delete(:days) if options[:days]
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# Returns a new Date where one or more of the elements have been changed according to the +options+ parameter.
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# Date.new(2007, 5, 12).change(:day => 1) # => Date.new(2007, 5, 1)
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# Date.new(2007, 5, 12).change(:year => 2005, :month => 1) # => Date.new(2005, 1, 12)
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options[:year] || self.year,
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options[:month] || self.month,
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options[:day] || self.day
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# Returns a new Date/DateTime representing the time a number of specified months ago
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def months_ago(months)
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advance(:months => -months)
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# Returns a new Date/DateTime representing the time a number of specified months in the future
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def months_since(months)
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advance(:months => months)
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# Returns a new Date/DateTime representing the time a number of specified years ago
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advance(:years => -years)
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# Returns a new Date/DateTime representing the time a number of specified years in the future
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def years_since(years)
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advance(:years => years)
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# Short-hand for years_ago(1)
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# Short-hand for years_since(1)
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# Short-hand for months_ago(1)
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# Short-hand for months_since(1)
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# Returns a new Date/DateTime representing the "start" of this week (i.e, Monday; DateTime objects will have time set to 0:00)
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def beginning_of_week
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days_to_monday = self.wday!=0 ? self.wday-1 : 6
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result = self - days_to_monday
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self.acts_like?(:time) ? result.midnight : result
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alias :monday :beginning_of_week
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alias :at_beginning_of_week :beginning_of_week
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# Returns a new Date/DateTime representing the end of this week (Sunday, DateTime objects will have time set to 23:59:59)
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days_to_sunday = self.wday!=0 ? 7-self.wday : 0
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result = self + days_to_sunday.days
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self.acts_like?(:time) ? result.end_of_day : result
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alias :at_end_of_week :end_of_week
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# Returns a new Date/DateTime representing the start of the given day in next week (default is Monday).
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def next_week(day = :monday)
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days_into_week = { :monday => 0, :tuesday => 1, :wednesday => 2, :thursday => 3, :friday => 4, :saturday => 5, :sunday => 6}
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result = (self + 7).beginning_of_week + days_into_week[day]
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self.acts_like?(:time) ? result.change(:hour => 0) : result
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# Returns a new ; DateTime objects will have time set to 0:00DateTime representing the start of the month (1st of the month; DateTime objects will have time set to 0:00)
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def beginning_of_month
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self.acts_like?(:time) ? change(:day => 1,:hour => 0, :min => 0, :sec => 0) : change(:day => 1)
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alias :at_beginning_of_month :beginning_of_month
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# Returns a new Date/DateTime representing the end of the month (last day of the month; DateTime objects will have time set to 0:00)
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last_day = ::Time.days_in_month( self.month, self.year )
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self.acts_like?(:time) ? change(:day => last_day, :hour => 23, :min => 59, :sec => 59) : change(:day => last_day)
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alias :at_end_of_month :end_of_month
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# Returns a new Date/DateTime representing the start of the quarter (1st of january, april, july, october; DateTime objects will have time set to 0:00)
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def beginning_of_quarter
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beginning_of_month.change(:month => [10, 7, 4, 1].detect { |m| m <= self.month })
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alias :at_beginning_of_quarter :beginning_of_quarter
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# Returns a new Date/DateTime representing the end of the quarter (last day of march, june, september, december; DateTime objects will have time set to 23:59:59)
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beginning_of_month.change(:month => [3, 6, 9, 12].detect { |m| m >= self.month }).end_of_month
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alias :at_end_of_quarter :end_of_quarter
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# Returns a new Date/DateTime representing the start of the year (1st of january; DateTime objects will have time set to 0:00)
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def beginning_of_year
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self.acts_like?(:time) ? change(:month => 1, :day => 1, :hour => 0, :min => 0, :sec => 0) : change(:month => 1, :day => 1)
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alias :at_beginning_of_year :beginning_of_year
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# Returns a new Time representing the end of the year (31st of december; DateTime objects will have time set to 23:59:59)
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self.acts_like?(:time) ? change(:month => 12,:day => 31,:hour => 23, :min => 59, :sec => 59) : change(:month => 12, :day => 31)
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alias :at_end_of_year :end_of_year
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# Convenience method which returns a new Date/DateTime representing the time 1 day ago
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# Convenience method which returns a new Date/DateTime representing the time 1 day since the instance time