Module ActiveSupport::CoreExtensions::DateTime::Calculations
In: vendor/rails/activesupport/lib/active_support/core_ext/date_time/calculations.rb

Enables the use of time calculations within DateTime itself

Methods

Classes and Modules

Module ActiveSupport::CoreExtensions::DateTime::Calculations::ClassMethods

Public Instance methods

Uses Date to provide precise Time calculations for years, months, and days. The options parameter takes a hash with any of these keys: :years, :months, :weeks, :days, :hours, :minutes, :seconds.

[Source]

    # File vendor/rails/activesupport/lib/active_support/core_ext/date_time/calculations.rb, line 49
49:         def advance(options)
50:           d = to_date.advance(options)
51:           datetime_advanced_by_date = change(:year => d.year, :month => d.month, :day => d.day)
52:           seconds_to_advance = (options[:seconds] || 0) + (options[:minutes] || 0) * 60 + (options[:hours] || 0) * 3600
53:           seconds_to_advance == 0 ? datetime_advanced_by_date : datetime_advanced_by_date.since(seconds_to_advance)
54:         end

Returns a new DateTime representing the time a number of seconds ago Do not use this method in combination with x.months, use months_ago instead!

[Source]

    # File vendor/rails/activesupport/lib/active_support/core_ext/date_time/calculations.rb, line 58
58:         def ago(seconds)
59:           self.since(-seconds)
60:         end
at_beginning_of_day()

Alias for beginning_of_day

at_midnight()

Alias for beginning_of_day

Returns a new DateTime representing the start of the day (0:00)

[Source]

    # File vendor/rails/activesupport/lib/active_support/core_ext/date_time/calculations.rb, line 70
70:         def beginning_of_day
71:           change(:hour => 0)
72:         end

Returns a new DateTime where one or more of the elements have been changed according to the options parameter. The time options (hour, minute, sec) reset cascadingly, so if only the hour is passed, then minute and sec is set to 0. If the hour and minute is passed, then sec is set to 0.

[Source]

    # File vendor/rails/activesupport/lib/active_support/core_ext/date_time/calculations.rb, line 32
32:         def change(options)
33:           ::DateTime.civil(
34:             options[:year]  || self.year,
35:             options[:month] || self.month,
36:             options[:day]   || self.day,
37:             options[:hour]  || self.hour,
38:             options[:min]   || (options[:hour] ? 0 : self.min),
39:             options[:sec]   || ((options[:hour] || options[:min]) ? 0 : self.sec),
40:             options[:offset]  || self.offset,
41:             options[:start]  || self.start
42:           )
43:         end

Layers additional behavior on DateTime#<=> so that Time and ActiveSupport::TimeWithZone instances can be compared with a DateTime

[Source]

     # File vendor/rails/activesupport/lib/active_support/core_ext/date_time/calculations.rb, line 104
104:         def compare_with_coercion(other)
105:           other = other.comparable_time if other.respond_to?(:comparable_time)
106:           other = other.to_datetime unless other.acts_like?(:date)
107:           compare_without_coercion(other)
108:         end

Returns a new DateTime representing the end of the day (23:59:59)

[Source]

    # File vendor/rails/activesupport/lib/active_support/core_ext/date_time/calculations.rb, line 78
78:         def end_of_day
79:           change(:hour => 23, :min => 59, :sec => 59)
80:         end
getutc()

Alias for utc

in(seconds)

Alias for since

midnight()

Alias for beginning_of_day

Seconds since midnight: DateTime.now.seconds_since_midnight

[Source]

    # File vendor/rails/activesupport/lib/active_support/core_ext/date_time/calculations.rb, line 25
25:         def seconds_since_midnight
26:           self.sec + (self.min * 60) + (self.hour * 3600)
27:         end

Returns a new DateTime representing the time a number of seconds since the instance time Do not use this method in combination with x.months, use months_since instead!

[Source]

    # File vendor/rails/activesupport/lib/active_support/core_ext/date_time/calculations.rb, line 64
64:         def since(seconds)
65:           self + Rational(seconds.round, 86400)
66:         end

Adjusts DateTime to UTC by adding its offset value; offset is set to 0

Example:

  DateTime.civil(2005, 2, 21, 10, 11, 12, Rational(-6, 24))       # => Mon, 21 Feb 2005 10:11:12 -0600
  DateTime.civil(2005, 2, 21, 10, 11, 12, Rational(-6, 24)).utc   # => Mon, 21 Feb 2005 16:11:12 +0000

[Source]

    # File vendor/rails/activesupport/lib/active_support/core_ext/date_time/calculations.rb, line 88
88:         def utc
89:           new_offset(0)
90:         end

Returns true if offset == 0

[Source]

    # File vendor/rails/activesupport/lib/active_support/core_ext/date_time/calculations.rb, line 94
94:         def utc?
95:           offset == 0
96:         end

Returns the offset value in seconds

[Source]

     # File vendor/rails/activesupport/lib/active_support/core_ext/date_time/calculations.rb, line 99
 99:         def utc_offset
100:           (offset * 86400).to_i
101:         end

[Validate]