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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)
Namespace
Methods
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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

Class Public 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: show | on GitHub 

# File activesupport/lib/active_support/duration.rb, line 188
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: show | on GitHub 

# File activesupport/lib/active_support/duration.rb, line 143
def parse(iso8601duration)
  parts = ISO8601Parser.new(iso8601duration).parse!
  new(calculate_total_seconds(parts), parts)
end

Instance Public methods

%(other)

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

Source: show | on GitHub 

# File activesupport/lib/active_support/duration.rb, line 306
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: show | on GitHub 

# File activesupport/lib/active_support/duration.rb, line 281
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: show | on GitHub 

# File activesupport/lib/active_support/duration.rb, line 262
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: show | on GitHub 

# File activesupport/lib/active_support/duration.rb, line 276
def -(other)
  self + (-other)
end

/(other)

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

Source: show | on GitHub 

# File activesupport/lib/active_support/duration.rb, line 292
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: show | on GitHub 

# File activesupport/lib/active_support/duration.rb, line 252
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: show | on GitHub 

# File activesupport/lib/active_support/duration.rb, line 335
def ==(other)
  if Duration === other
    other.value == value
  else
    other == value
  end
end

after(time = ::Time.current)

Alias for: since

ago(time = ::Time.current)

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

Also aliased as: until, before

Source: show | on GitHub 

# File activesupport/lib/active_support/duration.rb, line 438
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: show | on GitHub 

# File activesupport/lib/active_support/duration.rb, line 420
def eql?(other)
  Duration === other && other.value.eql?(value)
end

from_now(time = ::Time.current)

Alias for: since

hash()

Source: show | on GitHub 

# File activesupport/lib/active_support/duration.rb, line 424
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: show | on GitHub 

# File activesupport/lib/active_support/duration.rb, line 393
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: show | on GitHub 

# File activesupport/lib/active_support/duration.rb, line 386
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: show | on GitHub 

# File activesupport/lib/active_support/duration.rb, line 379
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: show | on GitHub 

# File activesupport/lib/active_support/duration.rb, line 407
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: show | on GitHub 

# File activesupport/lib/active_support/duration.rb, line 400
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: show | on GitHub 

# File activesupport/lib/active_support/duration.rb, line 414
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: show | on GitHub 

# File activesupport/lib/active_support/duration.rb, line 467
def iso8601(precision: nil)
  ISO8601Serializer.new(self, precision: precision).serialize
end

parts()

Returns a copy of the parts hash that defines the duration

Source: show | on GitHub 

# File activesupport/lib/active_support/duration.rb, line 235
def parts
  @parts.dup
end

since(time = ::Time.current)

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

Also aliased as: from_now, after

Source: show | on GitHub 

# File activesupport/lib/active_support/duration.rb, line 430
def since(time = ::Time.current)
  sum(1, time)
end

to_i()

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.

Also aliased as: in_seconds

Source: show | on GitHub 

# File activesupport/lib/active_support/duration.rb, line 371
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: show | on GitHub 

# File activesupport/lib/active_support/duration.rb, line 347
def to_s
  @value.to_s
end

until(time = ::Time.current)

Alias for: ago