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class ActiveSupport::Duration

Active Support Duration

Provides accurate date and time measurements using Date#advance and Time#advance, respectively. It mainly supports the methods on Numeric.

1.month.ago       # equivalent to Time.now.advance(months: -1)

Constants

PARTS

[:years, :months, :weeks, :days, :hours, :minutes, :seconds].freeze

PARTS_IN_SECONDS

{
seconds: 1,
minutes: SECONDS_PER_MINUTE,
hours:   SECONDS_PER_HOUR,
days:    SECONDS_PER_DAY,
weeks:   SECONDS_PER_WEEK,
months:  SECONDS_PER_MONTH,
years:   SECONDS_PER_YEAR
}.freeze

SECONDS_PER_DAY

86400

SECONDS_PER_HOUR

3600

SECONDS_PER_MINUTE

60

SECONDS_PER_MONTH

2629746

SECONDS_PER_WEEK

604800

SECONDS_PER_YEAR

31556952

VARIABLE_PARTS

[:years, :months, :weeks, :days].freeze

Attributes

[R] value

Public class methods

build(value)

Creates a new Duration from a seconds value that is converted to the individual parts:

ActiveSupport::Duration.build(31556952).parts # => {:years=>1}
ActiveSupport::Duration.build(2716146).parts  # => {:months=>1, :days=>1}
Source code GitHub 
# File activesupport/lib/active_support/duration.rb, line 189
def build(value)
  unless value.is_a?(::Numeric)
    raise TypeError, "can't build an #{self.name} from a #{value.class.name}"
  end

  parts = {}
  remainder_sign = value <=> 0
  remainder = value.round(9).abs
  variable = false

  PARTS.each do |part|
    unless part == :seconds
      part_in_seconds = PARTS_IN_SECONDS[part]
      parts[part] = remainder.div(part_in_seconds) * remainder_sign
      remainder %= part_in_seconds

      unless parts[part].zero?
        variable ||= VARIABLE_PARTS.include?(part)
      end
    end
  end unless value == 0

  parts[:seconds] = remainder * remainder_sign

  new(value, parts, variable)
end

parse(iso8601duration)

Creates a new Duration from string formatted according to ISO 8601 Duration.

See ISO 8601 for more information. This method allows negative parts to be present in pattern. If invalid string is provided, it will raise ActiveSupport::Duration::ISO8601Parser::ParsingError.

Source code GitHub 
# File activesupport/lib/active_support/duration.rb, line 144
def parse(iso8601duration)
  parts = ISO8601Parser.new(iso8601duration).parse!
  new(calculate_total_seconds(parts), parts)
end

Public instance methods

%(other)

Returns the modulo of this Duration by another Duration or Numeric. Numeric values are treated as seconds.

Source code GitHub 
# File activesupport/lib/active_support/duration.rb, line 312
def %(other)
  if Duration === other || Scalar === other
    Duration.build(value % other.value)
  elsif Numeric === other
    Duration.build(value % other)
  else
    raise_type_error(other)
  end
end

*(other)

Multiplies this Duration by a Numeric and returns a new Duration.

Source code GitHub 
# File activesupport/lib/active_support/duration.rb, line 287
def *(other)
  if Scalar === other || Duration === other
    Duration.new(value * other.value, @parts.transform_values { |number| number * other.value }, @variable || other.variable?)
  elsif Numeric === other
    Duration.new(value * other, @parts.transform_values { |number| number * other }, @variable)
  else
    raise_type_error(other)
  end
end

+(other)

Adds another Duration or a Numeric to this Duration. Numeric values are treated as seconds.

Source code GitHub 
# File activesupport/lib/active_support/duration.rb, line 268
def +(other)
  if Duration === other
    parts = @parts.merge(other._parts) do |_key, value, other_value|
      value + other_value
    end
    Duration.new(value + other.value, parts, @variable || other.variable?)
  else
    seconds = @parts.fetch(:seconds, 0) + other
    Duration.new(value + other, @parts.merge(seconds: seconds), @variable)
  end
end

-(other)

Subtracts another Duration or a Numeric from this Duration. Numeric values are treated as seconds.

Source code GitHub 
# File activesupport/lib/active_support/duration.rb, line 282
def -(other)
  self + (-other)
end

/(other)

Divides this Duration by a Numeric and returns a new Duration.

Source code GitHub 
# File activesupport/lib/active_support/duration.rb, line 298
def /(other)
  if Scalar === other
    Duration.new(value / other.value, @parts.transform_values { |number| number / other.value }, @variable)
  elsif Duration === other
    value / other.value
  elsif Numeric === other
    Duration.new(value / other, @parts.transform_values { |number| number / other }, @variable)
  else
    raise_type_error(other)
  end
end

<=>(other)

Compares one Duration with another or a Numeric to this Duration. Numeric values are treated as seconds.

Source code GitHub 
# File activesupport/lib/active_support/duration.rb, line 258
def <=>(other)
  if Duration === other
    value <=> other.value
  elsif Numeric === other
    value <=> other
  end
end

==(other)

Returns true if other is also a Duration instance with the same value, or if other == value.

Source code GitHub 
# File activesupport/lib/active_support/duration.rb, line 341
def ==(other)
  if Duration === other
    other.value == value
  else
    other == value
  end
end

after(time = ::Time.current)

Alias for: since.

ago(time = ::Time.current)

Also aliased as: until, before.

Calculates a new Time or Date that is as far in the past as this Duration represents.

Source code GitHub 
# File activesupport/lib/active_support/duration.rb, line 444
def ago(time = ::Time.current)
  sum(-1, time)
end

before(time = ::Time.current)

Alias for: ago.

eql?(other)

Returns true if other is also a Duration instance, which has the same parts as this one.

Source code GitHub 
# File activesupport/lib/active_support/duration.rb, line 426
def eql?(other)
  Duration === other && other.value.eql?(value)
end

from_now(time = ::Time.current)

Alias for: since.

hash()

Source code GitHub 
# File activesupport/lib/active_support/duration.rb, line 430
def hash
  @value.hash
end

in_days()

Returns the amount of days a duration covers as a float

12.hours.in_days # => 0.5
Source code GitHub 
# File activesupport/lib/active_support/duration.rb, line 399
def in_days
  in_seconds / SECONDS_PER_DAY.to_f
end

in_hours()

Returns the amount of hours a duration covers as a float

1.day.in_hours # => 24.0
Source code GitHub 
# File activesupport/lib/active_support/duration.rb, line 392
def in_hours
  in_seconds / SECONDS_PER_HOUR.to_f
end

in_minutes()

Returns the amount of minutes a duration covers as a float

1.day.in_minutes # => 1440.0
Source code GitHub 
# File activesupport/lib/active_support/duration.rb, line 385
def in_minutes
  in_seconds / SECONDS_PER_MINUTE.to_f
end

in_months()

Returns the amount of months a duration covers as a float

9.weeks.in_months # => 2.07
Source code GitHub 
# File activesupport/lib/active_support/duration.rb, line 413
def in_months
  in_seconds / SECONDS_PER_MONTH.to_f
end

in_seconds()

Alias for: to_i.

in_weeks()

Returns the amount of weeks a duration covers as a float

2.months.in_weeks # => 8.696
Source code GitHub 
# File activesupport/lib/active_support/duration.rb, line 406
def in_weeks
  in_seconds / SECONDS_PER_WEEK.to_f
end

in_years()

Returns the amount of years a duration covers as a float

30.days.in_years # => 0.082
Source code GitHub 
# File activesupport/lib/active_support/duration.rb, line 420
def in_years
  in_seconds / SECONDS_PER_YEAR.to_f
end

iso8601(precision: nil)

Build ISO 8601 Duration string for this duration. The precision parameter can be used to limit seconds’ precision of duration.

Source code GitHub 
# File activesupport/lib/active_support/duration.rb, line 473
def iso8601(precision: nil)
  ISO8601Serializer.new(self, precision: precision).serialize
end

parts()

Returns a copy of the parts hash that defines the duration.

5.minutes.parts # => {:minutes=>5}
3.years.parts # => {:years=>3}
Source code GitHub 
# File activesupport/lib/active_support/duration.rb, line 241
def parts
  @parts.dup
end

since(time = ::Time.current)

Also aliased as: from_now, after.

Calculates a new Time or Date that is as far in the future as this Duration represents.

Source code GitHub 
# File activesupport/lib/active_support/duration.rb, line 436
def since(time = ::Time.current)
  sum(1, time)
end

to_i()

Also aliased as: in_seconds.

Returns the number of seconds that this Duration represents.

1.minute.to_i   # => 60
1.hour.to_i     # => 3600
1.day.to_i      # => 86400

Note that this conversion makes some assumptions about the duration of some periods, e.g. months are always 1/12 of year and years are 365.2425 days:

# equivalent to (1.year / 12).to_i
1.month.to_i    # => 2629746

# equivalent to 365.2425.days.to_i
1.year.to_i     # => 31556952

In such cases, Ruby’s core Date and Time should be used for precision date and time arithmetic.

Source code GitHub 
# File activesupport/lib/active_support/duration.rb, line 377
def to_i
  @value.to_i
end

to_s()

Returns the amount of seconds a duration covers as a string. For more information check to_i method.

1.day.to_s # => "86400"
Source code GitHub 
# File activesupport/lib/active_support/duration.rb, line 353
def to_s
  @value.to_s
end

until(time = ::Time.current)

Alias for: ago.

Namespace

Definition files