Enables the use of time calculations within Time itself

Methods
Classes and Modules
Module ActiveSupport::CoreExtensions::Date::Calculations::ClassMethods
Public Instance methods
advance(options)

Provides precise Date calculations for years, months, and days. The options parameter takes a hash with any of these keys: :years, :months, :weeks, :days.

[ show source ]

     # File vendor/rails/activesupport/lib/active_support/core_ext/date/calculations.rb, line 94
 94:         def advance(options)
 95:           d = self
 96:           d = d >> options.delete(:years) * 12 if options[:years]
 97:           d = d >> options.delete(:months)     if options[:months]
 98:           d = d +  options.delete(:weeks) * 7  if options[:weeks]
 99:           d = d +  options.delete(:days)       if options[:days]
100:           d
101:         end
ago(seconds)

Converts Date to a Time (or DateTime if necessary) with the time portion set to the beginning of the day (0:00) and then subtracts the specified number of seconds

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    # File vendor/rails/activesupport/lib/active_support/core_ext/date/calculations.rb, line 52
52:         def ago(seconds)
53:           to_time.since(-seconds)
54:         end
at_beginning_of_day()

Alias for beginning_of_day

at_beginning_of_month()

Alias for beginning_of_month

at_beginning_of_quarter()

Alias for beginning_of_quarter

at_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()

Alias for end_of_week

at_end_of_year()

Alias for end_of_year

at_midnight()

Alias for beginning_of_day

beginning_of_day()

Converts Date to a Time (or DateTime if necessary) with the time portion set to the beginning of the day (0:00)

This method is also aliased as midnight at_midnight at_beginning_of_day

[ show source ]

    # File vendor/rails/activesupport/lib/active_support/core_ext/date/calculations.rb, line 64
64:         def beginning_of_day
65:           to_time
66:         end
beginning_of_month()

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)

This method is also aliased as at_beginning_of_month

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     # File vendor/rails/activesupport/lib/active_support/core_ext/date/calculations.rb, line 182
182:         def beginning_of_month
183:           self.acts_like?(:time) ? change(:day => 1,:hour => 0, :min => 0, :sec => 0) : change(:day => 1)
184:         end
beginning_of_quarter()

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)

This method is also aliased as at_beginning_of_quarter

[ show source ]

     # File vendor/rails/activesupport/lib/active_support/core_ext/date/calculations.rb, line 195
195:         def beginning_of_quarter
196:           beginning_of_month.change(:month => [10, 7, 4, 1].detect { |m| m <= self.month })
197:         end
beginning_of_week()

Returns a new Date/DateTime representing the "start" of this week (i.e, Monday; DateTime objects will have time set to 0:00)

This method is also aliased as monday at_beginning_of_week

[ show source ]

     # File vendor/rails/activesupport/lib/active_support/core_ext/date/calculations.rb, line 158
158:         def beginning_of_week
159:           days_to_monday = self.wday!=0 ? self.wday-1 : 6
160:           result = self - days_to_monday
161:           self.acts_like?(:time) ? result.midnight : result
162:         end
beginning_of_year()

Returns a new Date/DateTime representing the start of the year (1st of january; DateTime objects will have time set to 0:00)

This method is also aliased as at_beginning_of_year

[ show source ]

     # File vendor/rails/activesupport/lib/active_support/core_ext/date/calculations.rb, line 207
207:         def beginning_of_year
208:           self.acts_like?(:time) ? change(:month => 1, :day => 1, :hour => 0, :min => 0, :sec => 0) : change(:month => 1, :day => 1)
209:         end
change(options)

Returns a new Date where one or more of the elements have been changed according to the options parameter.

Examples: 

  Date.new(2007, 5, 12).change(:day => 1)                  # => Date.new(2007, 5, 1)
  Date.new(2007, 5, 12).change(:year => 2005, :month => 1) # => Date.new(2005, 1, 12)

[ show source ]

     # File vendor/rails/activesupport/lib/active_support/core_ext/date/calculations.rb, line 109
109:         def change(options)
110:           ::Date.new(
111:             options[:year]  || self.year,
112:             options[:month] || self.month,
113:             options[:day]   || self.day
114:           )
115:         end
end_of_day()

Converts Date to a Time (or DateTime if necessary) with the time portion set to the end of the day (23:59:59)

[ show source ]

    # File vendor/rails/activesupport/lib/active_support/core_ext/date/calculations.rb, line 72
72:         def end_of_day
73:           to_time.end_of_day
74:         end
end_of_month()

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)

This method is also aliased as at_end_of_month

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     # File vendor/rails/activesupport/lib/active_support/core_ext/date/calculations.rb, line 188
188:         def end_of_month
189:           last_day = ::Time.days_in_month( self.month, self.year )
190:           self.acts_like?(:time) ? change(:day => last_day, :hour => 23, :min => 59, :sec => 59) : change(:day => last_day)
191:         end
end_of_quarter()

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)

This method is also aliased as at_end_of_quarter

[ show source ]

     # File vendor/rails/activesupport/lib/active_support/core_ext/date/calculations.rb, line 201
201:         def end_of_quarter
202:           beginning_of_month.change(:month => [3, 6, 9, 12].detect { |m| m >= self.month }).end_of_month
203:         end
end_of_week()

Returns a new Date/DateTime representing the end of this week (Sunday, DateTime objects will have time set to 23:59:59)

This method is also aliased as at_end_of_week

[ show source ]

     # File vendor/rails/activesupport/lib/active_support/core_ext/date/calculations.rb, line 167
167:         def end_of_week
168:           days_to_sunday = self.wday!=0 ? 7-self.wday : 0
169:           result = self + days_to_sunday.days
170:           self.acts_like?(:time) ? result.end_of_day : result
171:         end
end_of_year()

Returns a new Time representing the end of the year (31st of december; DateTime objects will have time set to 23:59:59)

This method is also aliased as at_end_of_year

[ show source ]

     # File vendor/rails/activesupport/lib/active_support/core_ext/date/calculations.rb, line 213
213:         def end_of_year
214:           self.acts_like?(:time) ? change(:month => 12,:day => 31,:hour => 23, :min => 59, :sec => 59) : change(:month => 12, :day => 31)
215:         end
future?()

Tells whether the Date object‘s date lies in the future

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    # File vendor/rails/activesupport/lib/active_support/core_ext/date/calculations.rb, line 46
46:         def future?
47:           self > ::Date.current
48:         end
in(seconds)

Alias for since

last_month()

Short-hand for months_ago(1)

[ show source ]

     # File vendor/rails/activesupport/lib/active_support/core_ext/date/calculations.rb, line 148
148:         def last_month
149:           months_ago(1)
150:         end
last_year()

Short-hand for years_ago(1)

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     # File vendor/rails/activesupport/lib/active_support/core_ext/date/calculations.rb, line 138
138:         def last_year
139:           years_ago(1)
140:         end
midnight()

Alias for beginning_of_day

monday()

Alias for beginning_of_week

months_ago(months)

Returns a new Date/DateTime representing the time a number of specified months ago

[ show source ]

     # File vendor/rails/activesupport/lib/active_support/core_ext/date/calculations.rb, line 118
118:         def months_ago(months)
119:           advance(:months => -months)
120:         end
months_since(months)

Returns a new Date/DateTime representing the time a number of specified months in the future

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     # File vendor/rails/activesupport/lib/active_support/core_ext/date/calculations.rb, line 123
123:         def months_since(months)
124:           advance(:months => months)
125:         end
next_month()

Short-hand for months_since(1)

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     # File vendor/rails/activesupport/lib/active_support/core_ext/date/calculations.rb, line 153
153:         def next_month
154:           months_since(1)
155:         end
next_week(day = :monday)

Returns a new Date/DateTime representing the start of the given day in next week (default is Monday).

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     # File vendor/rails/activesupport/lib/active_support/core_ext/date/calculations.rb, line 175
175:         def next_week(day = :monday)
176:           days_into_week = { :monday => 0, :tuesday => 1, :wednesday => 2, :thursday => 3, :friday => 4, :saturday => 5, :sunday => 6}
177:           result = (self + 7).beginning_of_week + days_into_week[day]
178:           self.acts_like?(:time) ? result.change(:hour => 0) : result
179:         end
next_year()

Short-hand for years_since(1)

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     # File vendor/rails/activesupport/lib/active_support/core_ext/date/calculations.rb, line 143
143:         def next_year
144:           years_since(1)
145:         end
past?()

Tells whether the Date object‘s date lies in the past

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    # File vendor/rails/activesupport/lib/active_support/core_ext/date/calculations.rb, line 36
36:         def past?
37:           self < ::Date.current
38:         end
since(seconds)

Converts Date to a Time (or DateTime if necessary) with the time portion set to the beginning of the day (0:00) and then adds the specified number of seconds

This method is also aliased as in

[ show source ]

    # File vendor/rails/activesupport/lib/active_support/core_ext/date/calculations.rb, line 58
58:         def since(seconds)
59:           to_time.since(seconds)
60:         end
today?()

Tells whether the Date object‘s date is today

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    # File vendor/rails/activesupport/lib/active_support/core_ext/date/calculations.rb, line 41
41:         def today?
42:           self.to_date == ::Date.current # we need the to_date because of DateTime
43:         end
tomorrow()

Convenience method which returns a new Date/DateTime representing the time 1 day since the instance time

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     # File vendor/rails/activesupport/lib/active_support/core_ext/date/calculations.rb, line 224
224:         def tomorrow
225:           self + 1
226:         end
years_ago(years)

Returns a new Date/DateTime representing the time a number of specified years ago

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     # File vendor/rails/activesupport/lib/active_support/core_ext/date/calculations.rb, line 128
128:         def years_ago(years)
129:           advance(:years => -years)
130:         end
years_since(years)

Returns a new Date/DateTime representing the time a number of specified years in the future

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     # File vendor/rails/activesupport/lib/active_support/core_ext/date/calculations.rb, line 133
133:         def years_since(years)
134:           advance(:years => years)
135:         end
yesterday()

Convenience method which returns a new Date/DateTime representing the time 1 day ago

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     # File vendor/rails/activesupport/lib/active_support/core_ext/date/calculations.rb, line 219
219:         def yesterday
220:           self - 1
221:         end