Date#advance and Time#advance, respectively."> Date#advance and Time#advance, respectively.">
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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
SECONDS_PER_MINUTE = 60
 
SECONDS_PER_HOUR = 3600
 
SECONDS_PER_DAY = 86400
 
SECONDS_PER_WEEK = 604800
 
SECONDS_PER_MONTH = 2629746
 
SECONDS_PER_YEAR = 31556952
 
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
 
PARTS = [:years, :months, :weeks, :days, :hours, :minutes, :seconds].freeze
 
Attributes
[RW] parts
[RW] 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}
# File activesupport/lib/active_support/duration.rb, line 183
def build(value)
  parts = {}
  remainder = value.to_f

  PARTS.each do |part|
    unless part == :seconds
      part_in_seconds = PARTS_IN_SECONDS[part]
      parts[part] = remainder.div(part_in_seconds)
      remainder = (remainder % part_in_seconds).round(9)
    end
  end

  parts[:seconds] = remainder
  parts.reject! { |k, v| v.zero? }

  new(value, parts)
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.

# File activesupport/lib/active_support/duration.rb, line 138
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.

# File activesupport/lib/active_support/duration.rb, line 280
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.

# File activesupport/lib/active_support/duration.rb, line 255
def *(other)
  if Scalar === other || Duration === other
    Duration.new(value * other.value, parts.map { |type, number| [type, number * other.value] })
  elsif Numeric === other
    Duration.new(value * other, parts.map { |type, number| [type, number * other] })
  else
    raise_type_error(other)
  end
end
+(other)

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

# File activesupport/lib/active_support/duration.rb, line 235
def +(other)
  if Duration === other
    parts = @parts.dup
    other.parts.each do |(key, value)|
      parts[key] += value
    end
    Duration.new(value + other.value, parts)
  else
    seconds = @parts[:seconds] + other
    Duration.new(value + other, @parts.merge(seconds: seconds))
  end
end
-(other)

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

# File activesupport/lib/active_support/duration.rb, line 250
def -(other)
  self + (-other)
end
/(other)

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

# File activesupport/lib/active_support/duration.rb, line 266
def /(other)
  if Scalar === other
    Duration.new(value / other.value, parts.map { |type, number| [type, number / other.value] })
  elsif Duration === other
    value / other.value
  elsif Numeric === other
    Duration.new(value / other, parts.map { |type, number| [type, number / other] })
  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.

# File activesupport/lib/active_support/duration.rb, line 225
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.

# File activesupport/lib/active_support/duration.rb, line 305
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
# File activesupport/lib/active_support/duration.rb, line 365
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.

# File activesupport/lib/active_support/duration.rb, line 347
def eql?(other)
  Duration === other && other.value.eql?(value)
end
from_now(time = ::Time.current)
Alias for: since
hash()
# File activesupport/lib/active_support/duration.rb, line 351
def hash
  @value.hash
end
iso8601(precision: nil)

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

# File activesupport/lib/active_support/duration.rb, line 385
def iso8601(precision: nil)
  ISO8601Serializer.new(self, precision: precision).serialize
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
# File activesupport/lib/active_support/duration.rb, line 357
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.

# File activesupport/lib/active_support/duration.rb, line 341
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"
# File activesupport/lib/active_support/duration.rb, line 317
def to_s
  @value.to_s
end
until(time = ::Time.current)
Alias for: ago