Report class name as 'Time' to thwart type checking.

# File activesupport/lib/active_support/time_with_zone.rb, line 41
def self.name
  'Time'
end

Adds an interval of time to the current object's time and returns that value as a new TimeWithZone object.

Time.zone = 'Eastern Time (US & Canada)' # => 'Eastern Time (US & Canada)'
now = Time.zone.now # => Sun, 02 Nov 2014 01:26:28 EDT -04:00
now + 1000          # => Sun, 02 Nov 2014 01:43:08 EDT -04:00

If we're adding a Duration of variable length (i.e., years, months, days), move forward from time, otherwise move forward from utc, for accuracy when moving across DST boundaries.

For instance, a time + 24.hours will advance exactly 24 hours, while a time + 1.day will advance 23-25 hours, depending on the day.

now + 24.hours      # => Mon, 03 Nov 2014 00:26:28 EST -05:00
now + 1.day         # => Mon, 03 Nov 2014 01:26:28 EST -05:00

# File activesupport/lib/active_support/time_with_zone.rb, line 274
def +(other)
  if duration_of_variable_length?(other)
    method_missing(:+, other)
  else
    result = utc.acts_like?(:date) ? utc.since(other) : utc + other rescue utc.since(other)
    result.in_time_zone(time_zone)
  end
end

Returns a new TimeWithZone object that represents the difference between the current object's time and the other time.

Time.zone = 'Eastern Time (US & Canada)' # => 'Eastern Time (US & Canada)'
now = Time.zone.now # => Mon, 03 Nov 2014 00:26:28 EST -05:00
now - 1000          # => Mon, 03 Nov 2014 00:09:48 EST -05:00

If subtracting a Duration of variable length (i.e., years, months, days), move backward from time, otherwise move backward from utc, for accuracy when moving across DST boundaries.

For instance, a time - 24.hours will go subtract exactly 24 hours, while a time - 1.day will subtract 23-25 hours, depending on the day.

now - 24.hours      # => Sun, 02 Nov 2014 01:26:28 EDT -04:00
now - 1.day         # => Sun, 02 Nov 2014 00:26:28 EDT -04:00

# File activesupport/lib/active_support/time_with_zone.rb, line 301
def -(other)
  if other.acts_like?(:time)
    to_time - other.to_time
  elsif duration_of_variable_length?(other)
    method_missing(:-, other)
  else
    result = utc.acts_like?(:date) ? utc.ago(other) : utc - other rescue utc.ago(other)
    result.in_time_zone(time_zone)
  end
end

Use the time in UTC for comparisons.

# File activesupport/lib/active_support/time_with_zone.rb, line 223
def <=>(other)
  utc <=> other
end

So that self acts_like?(:time).

# File activesupport/lib/active_support/time_with_zone.rb, line 415
def acts_like_time?
  true
end

Uses Date to provide precise Time calculations for years, months, and days according to the proleptic Gregorian calendar. The result is returned as a new TimeWithZone object.

The options parameter takes a hash with any of these keys: :years, :months, :weeks, :days, :hours, :minutes, :seconds.

If advancing by a value of variable length (i.e., years, weeks, months, days), move forward from time, otherwise move forward from utc, for accuracy when moving across DST boundaries.

Time.zone = 'Eastern Time (US & Canada)' # => 'Eastern Time (US & Canada)'
now = Time.zone.now # => Sun, 02 Nov 2014 01:26:28 EDT -04:00
now.advance(seconds: 1) # => Sun, 02 Nov 2014 01:26:29 EDT -04:00
now.advance(minutes: 1) # => Sun, 02 Nov 2014 01:27:28 EDT -04:00
now.advance(hours: 1)   # => Sun, 02 Nov 2014 01:26:28 EST -05:00
now.advance(days: 1)    # => Mon, 03 Nov 2014 01:26:28 EST -05:00
now.advance(weeks: 1)   # => Sun, 09 Nov 2014 01:26:28 EST -05:00
now.advance(months: 1)  # => Tue, 02 Dec 2014 01:26:28 EST -05:00
now.advance(years: 1)   # => Mon, 02 Nov 2015 01:26:28 EST -05:00

# File activesupport/lib/active_support/time_with_zone.rb, line 354
def advance(options)
  # If we're advancing a value of variable length (i.e., years, weeks, months, days), advance from #time,
  # otherwise advance from #utc, for accuracy when moving across DST boundaries
  if options.values_at(:years, :weeks, :months, :days).any?
    method_missing(:advance, options)
  else
    utc.advance(options).in_time_zone(time_zone)
  end
end

Subtracts an interval of time from the current object's time and returns the result as a new TimeWithZone object.

Time.zone = 'Eastern Time (US & Canada)' # => 'Eastern Time (US & Canada)'
now = Time.zone.now # => Mon, 03 Nov 2014 00:26:28 EST -05:00
now.ago(1000)       # => Mon, 03 Nov 2014 00:09:48 EST -05:00

If we're subtracting a Duration of variable length (i.e., years, months, days), move backward from time, otherwise move backward from utc, for accuracy when moving across DST boundaries.

For instance, time.ago(24.hours) will move back exactly 24 hours, while time.ago(1.day) will move back 23-25 hours, depending on the day.

now.ago(24.hours)   # => Sun, 02 Nov 2014 01:26:28 EDT -04:00
now.ago(1.day)      # => Sun, 02 Nov 2014 00:26:28 EDT -04:00

# File activesupport/lib/active_support/time_with_zone.rb, line 329
def ago(other)
  since(-other)
end

Coerces time to a string for JSON encoding. The default format is ISO 8601. You can get %Y/%m/%d %H:%M:%S +offset style by setting ActiveSupport::JSON::Encoding.use_standard_json_time_format to false.

# With ActiveSupport::JSON::Encoding.use_standard_json_time_format = true
Time.utc(2005,2,1,15,15,10).in_time_zone("Hawaii").to_json
# => "2005-02-01T05:15:10.000-10:00"

# With ActiveSupport::JSON::Encoding.use_standard_json_time_format = false
Time.utc(2005,2,1,15,15,10).in_time_zone("Hawaii").to_json
# => "2005/02/01 05:15:10 -1000"

# File activesupport/lib/active_support/time_with_zone.rb, line 165
def as_json(options = nil)
  if ActiveSupport::JSON::Encoding.use_standard_json_time_format
    xmlschema(ActiveSupport::JSON::Encoding.time_precision)
  else
    %Q(#{time.strftime("%Y/%m/%d %H:%M:%S")} #{formatted_offset(false)})
  end
end

Returns true if the current object's time is within the specified min and max time.

# File activesupport/lib/active_support/time_with_zone.rb, line 229
def between?(min, max)
  utc.between?(min, max)
end

An instance of ActiveSupport::TimeWithZone is never blank

# File activesupport/lib/active_support/time_with_zone.rb, line 426
def blank?
  false
end

Returns true if the current time is within Daylight Savings Time for the specified time zone.

Time.zone = 'Eastern Time (US & Canada)'    # => 'Eastern Time (US & Canada)'
Time.zone.parse("2012-5-30").dst?           # => true
Time.zone.parse("2012-11-30").dst?          # => false

# File activesupport/lib/active_support/time_with_zone.rb, line 94
def dst?
  period.dst?
end

Returns true if other is equal to current object.

# File activesupport/lib/active_support/time_with_zone.rb, line 250
def eql?(other)
  other.eql?(utc)
end

Returns a formatted string of the offset from UTC, or an alternative string if the time zone is already UTC.

Time.zone = 'Eastern Time (US & Canada)'   # => "Eastern Time (US & Canada)"
Time.zone.now.formatted_offset(true)       # => "-05:00"
Time.zone.now.formatted_offset(false)      # => "-0500"
Time.zone = 'UTC'                          # => "UTC"
Time.zone.now.formatted_offset(true, "0")  # => "0"

# File activesupport/lib/active_support/time_with_zone.rb, line 125
def formatted_offset(colon = true, alternate_utc_string = nil)
  utc? && alternate_utc_string || TimeZone.seconds_to_utc_offset(utc_offset, colon)
end

Returns true if the current object's time is in the future.

# File activesupport/lib/active_support/time_with_zone.rb, line 245
def future?
  utc.future?
end

Returns a string of the object's date and time in the format used by HTTP requests.

Time.zone.now.httpdate  # => "Tue, 01 Jan 2013 04:39:43 GMT"

# File activesupport/lib/active_support/time_with_zone.rb, line 186
def httpdate
  utc.httpdate
end

Returns the simultaneous time in Time.zone, or the specified zone.

# File activesupport/lib/active_support/time_with_zone.rb, line 77
def in_time_zone(new_zone = ::Time.zone)
  return self if time_zone == new_zone
  utc.in_time_zone(new_zone)
end

Returns a string of the object's date, time, zone and offset from UTC.

Time.zone.now.inspect # => "Thu, 04 Dec 2014 11:00:25 EST -05:00"

# File activesupport/lib/active_support/time_with_zone.rb, line 140
def inspect
  "#{time.strftime('%a, %d %b %Y %H:%M:%S')} #{zone} #{formatted_offset}"
end

Say we're a Time to thwart type checking.

# File activesupport/lib/active_support/time_with_zone.rb, line 420
def is_a?(klass)
  klass == ::Time || super
end

Returns a Time instance of the simultaneous time in the system timezone.

# File activesupport/lib/active_support/time_with_zone.rb, line 83
def localtime(utc_offset = nil)
  utc.getlocal(utc_offset)
end

Send the missing method to time instance, and wrap result in a new TimeWithZone with the existing time_zone.

# File activesupport/lib/active_support/time_with_zone.rb, line 461
def method_missing(sym, *args, &block)
  wrap_with_time_zone time.__send__(sym, *args, &block)
rescue NoMethodError => e
  raise e, e.message.sub(time.inspect, self.inspect), e.backtrace
end

Returns true if the current object's time is in the past.

# File activesupport/lib/active_support/time_with_zone.rb, line 234
def past?
  utc.past?
end

Returns the underlying TZInfo::TimezonePeriod.

# File activesupport/lib/active_support/time_with_zone.rb, line 72
def period
  @period ||= time_zone.period_for_utc(@utc)
end

respond_to_missing? is not called in some cases, such as when type conversion is performed with Kernel#String

# File activesupport/lib/active_support/time_with_zone.rb, line 446
def respond_to?(sym, include_priv = false)
  # ensure that we're not going to throw and rescue from NoMethodError in method_missing which is slow
  return false if sym.to_sym == :to_str
  super
end

Ensure proxy class responds to all methods that underlying time instance responds to.

# File activesupport/lib/active_support/time_with_zone.rb, line 454
def respond_to_missing?(sym, include_priv)
  return false if sym.to_sym == :acts_like_date?
  time.respond_to?(sym, include_priv)
end

Returns a string of the object's date and time in the RFC 2822 standard format.

Time.zone.now.rfc2822  # => "Tue, 01 Jan 2013 04:51:39 +0000"

# File activesupport/lib/active_support/time_with_zone.rb, line 194
def rfc2822
  to_s(:rfc822)
end

Replaces %Z directive with +zone before passing to Time#strftime, so that zone information is correct.

# File activesupport/lib/active_support/time_with_zone.rb, line 217
def strftime(format)
  format = format.gsub(/((?:\A|[^%])(?:%%)*)%Z/, "\\1#{zone}")
  getlocal(utc_offset).strftime(format)
end

Returns a Time instance that represents the time in time_zone.

# File activesupport/lib/active_support/time_with_zone.rb, line 58
def time
  @time ||= period.to_local(@utc)
end

Returns Array of parts of Time in sequence of [seconds, minutes, hours, day, month, year, weekday, yearday, dst?, zone].

now = Time.zone.now     # => Tue, 18 Aug 2015 02:29:27 UTC +00:00
now.to_a                # => [27, 29, 2, 18, 8, 2015, 2, 230, false, "UTC"]

# File activesupport/lib/active_support/time_with_zone.rb, line 377
def to_a
  [time.sec, time.min, time.hour, time.day, time.mon, time.year, time.wday, time.yday, dst?, zone]
end

Returns an instance of DateTime with the timezone's UTC offset

Time.zone.now.to_datetime                         # => Tue, 18 Aug 2015 02:32:20 +0000
Time.current.in_time_zone('Hawaii').to_datetime   # => Mon, 17 Aug 2015 16:32:20 -1000

# File activesupport/lib/active_support/time_with_zone.rb, line 410
def to_datetime
  utc.to_datetime.new_offset(Rational(utc_offset, 86_400))
end

Returns the object's date and time as a floating point number of seconds since the Epoch (January 1, 1970 00:00 UTC).

Time.zone.now.to_f # => 1417709320.285418

# File activesupport/lib/active_support/time_with_zone.rb, line 385
def to_f
  utc.to_f
end

Returns the object's date and time as an integer number of seconds since the Epoch (January 1, 1970 00:00 UTC).

Time.zone.now.to_i # => 1417709320

# File activesupport/lib/active_support/time_with_zone.rb, line 393
def to_i
  utc.to_i
end

Returns the object's date and time as a rational number of seconds since the Epoch (January 1, 1970 00:00 UTC).

Time.zone.now.to_r # => (708854548642709/500000)

# File activesupport/lib/active_support/time_with_zone.rb, line 402
def to_r
  utc.to_r
end

Returns a string of the object's date and time. Accepts an optional format:

• :default - default value, mimics Ruby Time#to_s format.

• :db - format outputs time in UTC :db time. See Time#to_formatted_s(:db).

• Any key in Time::DATE_FORMATS can be used. See active_support/core_ext/time/conversions.rb.

# File activesupport/lib/active_support/time_with_zone.rb, line 204
def to_s(format = :default)
  if format == :db
    utc.to_s(format)
  elsif formatter = ::Time::DATE_FORMATS[format]
    formatter.respond_to?(:call) ? formatter.call(self).to_s : strftime(formatter)
  else
    "#{time.strftime("%Y-%m-%d %H:%M:%S")} #{formatted_offset(false, 'UTC')}" # mimicking Ruby Time#to_s format
  end
end

Returns true if the current object's time falls within the current day.

# File activesupport/lib/active_support/time_with_zone.rb, line 240
def today?
  time.today?
end

Returns a Time instance of the simultaneous time in the UTC timezone.

# File activesupport/lib/active_support/time_with_zone.rb, line 63
def utc
  @utc ||= period.to_utc(@time)
end

Returns true if the current time zone is set to UTC.

Time.zone = 'UTC'                           # => 'UTC'
Time.zone.now.utc?                          # => true
Time.zone = 'Eastern Time (US & Canada)'    # => 'Eastern Time (US & Canada)'
Time.zone.now.utc?                          # => false

# File activesupport/lib/active_support/time_with_zone.rb, line 105
def utc?
  period.offset.abbreviation == :UTC || period.offset.abbreviation == :UCT
end

Returns the offset from current time to UTC time in seconds.

# File activesupport/lib/active_support/time_with_zone.rb, line 111
def utc_offset
  period.utc_total_offset
end

Returns a string of the object's date and time in the ISO 8601 standard format.

Time.zone.now.xmlschema  # => "2014-12-04T11:02:37-05:00"

# File activesupport/lib/active_support/time_with_zone.rb, line 148
def xmlschema(fraction_digits = 0)
  "#{time.strftime(PRECISIONS[fraction_digits.to_i])}#{formatted_offset(true, 'Z'.freeze)}"
end

Returns the time zone abbreviation.

Time.zone = 'Eastern Time (US & Canada)'   # => "Eastern Time (US & Canada)"
Time.zone.now.zone # => "EST"

# File activesupport/lib/active_support/time_with_zone.rb, line 133
def zone
  period.zone_identifier.to_s
end