Class: ActiveSupport::Duration

Relationships & Source Files
Namespace Children
Classes: `ISO8601Parser`, `ISO8601Serializer`, `Scalar`
Inherits:	Object
Defined in:	activesupport/lib/active_support/duration.rb, activesupport/lib/active_support/duration/iso8601_parser.rb, activesupport/lib/active_support/duration/iso8601_serializer.rb

Overview

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)

Constant Summary

PARTS =
# File 'activesupport/lib/active_support/duration.rb', line 130

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

PARTS_IN_SECONDS =
# File 'activesupport/lib/active_support/duration.rb', line 120

{
  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 =
# File 'activesupport/lib/active_support/duration.rb', line 115
```
86400
```
SECONDS_PER_HOUR =
# File 'activesupport/lib/active_support/duration.rb', line 114
```
3600
```
SECONDS_PER_MINUTE =
# File 'activesupport/lib/active_support/duration.rb', line 113
```
60
```
SECONDS_PER_MONTH =

1/12 of a gregorian year

# File 'activesupport/lib/active_support/duration.rb', line 117
```
2629746
```
SECONDS_PER_WEEK =
# File 'activesupport/lib/active_support/duration.rb', line 116
```
604800
```
SECONDS_PER_YEAR =

length of a gregorian year (365.2425 days)

# File 'activesupport/lib/active_support/duration.rb', line 118
```
31556952
```
VARIABLE_PARTS =
# File 'activesupport/lib/active_support/duration.rb', line 131
```
[:years, :months, :weeks, :days].freeze
```

Class Method Summary

.build(value)

Creates a new Duration from a seconds value that is converted to the individual parts:
.parse(iso8601duration)

Creates a new Duration from string formatted according to ISO 8601 Duration.
.calculate_total_seconds(parts) private
.===(other) Internal use only
.days(value) Internal use only
.hours(value) Internal use only
.minutes(value) Internal use only
.months(value) Internal use only
.new(value, parts, variable = nil) ⇒ Duration constructor Internal use only
.seconds(value) Internal use only
.weeks(value) Internal use only
.years(value) Internal use only

Instance Attribute Summary

#value readonly
#variable? ⇒ Boolean readonly Internal use only

Instance Method Summary

#%(other)

Returns the modulo of this Duration by another Duration or ::Numeric.
#*(other)

Multiplies this Duration by a ::Numeric and returns a new Duration.
#+(other)

Adds another Duration or a ::Numeric to this Duration.
#-(other)

Subtracts another Duration or a ::Numeric from this Duration.
#/(other)

Divides this Duration by a ::Numeric and returns a new Duration.
#<=>(other)

Compares one Duration with another or a ::Numeric to this Duration.
#==(other)

Returns true if other is also a Duration instance with the same #value, or if other == value.
#after(time = ::Time.current)

Alias for #since.
#ago(time = ::Time.current) (also: #until, #before)

Calculates a new ::Time or ::Date that is as far in the past as this Duration represents.
#before(time = ::Time.current)

Alias for #ago.
#eql?(other) ⇒ Boolean

Returns true if other is also a Duration instance, which has the same parts as this one.
#from_now(time = ::Time.current)

Alias for #since.
#hash
#in_days

Returns the amount of days a duration covers as a float.
#in_hours

Returns the amount of hours a duration covers as a float.
#in_minutes

Returns the amount of minutes a duration covers as a float.
#in_months

Returns the amount of months a duration covers as a float.
#in_seconds

Alias for #to_i.
#in_weeks

Returns the amount of weeks a duration covers as a float.
#in_years

Returns the amount of years a duration covers as a float.
#iso8601(precision: nil)

Build ISO 8601 Duration string for this duration.
#kind_of?(klass)

Alias for #is_a?.
#parts

Returns a copy of the parts hash that defines the duration.
#since(time = ::Time.current) (also: #from_now, #after)

Calculates a new ::Time or ::Date that is as far in the future as this Duration represents.
#to_i (also: #in_seconds)

Returns the number of seconds that this Duration represents.
#to_s

Returns the amount of seconds a duration covers as a string.
#until(time = ::Time.current)

Alias for #ago.
#method_missing private
#raise_type_error(other) private
#respond_to_missing?(method, _) ⇒ Boolean private
#sum(sign, time = ::Time.current) private
#+@ Internal use only
#-@ Internal use only
#_parts Internal use only
#as_json(options = nil) Internal use only
#coerce(other) Internal use only
#encode_with(coder) Internal use only
#init_with(coder) Internal use only
#inspect Internal use only
#instance_of?(klass) ⇒ Boolean Internal use only
#is_a?(klass) ⇒ Boolean (also: #kind_of?) Internal use only

Constructor Details

.new(value, parts, variable = nil) ⇒ `Duration`

This method is for internal use only.

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 226


def initialize(value, parts, variable = nil) # :nodoc:
  @value, @parts = value, parts
  @parts.reject! { |k, v| v.zero? } unless value == 0
  @parts.freeze
  @variable = variable

  if @variable.nil?
    @variable = @parts.any? { |part, _| VARIABLE_PARTS.include?(part) }
  end
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing (private)

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 516


def method_missing(...)
  value.public_send(...)
end

Class Method Details

.===(other)

This method is for internal use only.

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 149


def ===(other) # :nodoc:
  other.is_a?(Duration)
rescue ::NoMethodError
  false
end

.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}

[ 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

.calculate_total_seconds(parts) (private)

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 217


def calculate_total_seconds(parts)
  parts.inject(0) do |total, (part, value)|
    total + value * PARTS_IN_SECONDS[part]
  end
end

.days(value)

This method is for internal use only.

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 167


def days(value) # :nodoc:
  new(value * SECONDS_PER_DAY, { days: value }, true)
end

.hours(value)

This method is for internal use only.

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 163


def hours(value) # :nodoc:
  new(value * SECONDS_PER_HOUR, { hours: value }, false)
end

.minutes(value)

This method is for internal use only.

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 159


def minutes(value) # :nodoc:
  new(value * SECONDS_PER_MINUTE, { minutes: value }, false)
end

.months(value)

This method is for internal use only.

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 175


def months(value) # :nodoc:
  new(value * SECONDS_PER_MONTH, { months: value }, true)
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 Duration::ISO8601Parser::ParsingError.

[ 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

.seconds(value)

This method is for internal use only.

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 155


def seconds(value) # :nodoc:
  new(value, { seconds: value }, false)
end

.weeks(value)

This method is for internal use only.

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 171


def weeks(value) # :nodoc:
  new(value * SECONDS_PER_WEEK, { weeks: value }, true)
end

.years(value)

This method is for internal use only.

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 179


def years(value) # :nodoc:
  new(value * SECONDS_PER_YEAR, { years: value }, true)
end

Instance Attribute Details

#value (readonly)

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 133


attr_reader :value

#variable? ⇒ `Boolean` (readonly)

This method is for internal use only.

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 477


def variable? # :nodoc:
  @variable
end

Instance Method Details

#%(other)

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

[ 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.

[ 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.

[ 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

#+@

This method is for internal use only.

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 326


def +@ # :nodoc:
  self
end

#-(other)

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

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 282


def -(other)
  self + (-other)
end

#-@

This method is for internal use only.

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 322


def -@ # :nodoc:
  Duration.new(-value, @parts.transform_values(&:-@), @variable)
end

#/(other)

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

[ 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.

[ 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.

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 341


def ==(other)
  if Duration === other
    other.value == value
  else
    other == value
  end
end

#_parts

This method is for internal use only.

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 481


def _parts # :nodoc:
  @parts
end

#after(time = ::Time.current)

Alias for #since.

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 440


alias :after :since

#ago(time = ::Time.current) Also known as: #until, #before

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

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 444


def ago(time = ::Time.current)
  sum(-1, time)
end

#as_json(options = nil)

This method is for internal use only.

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 459


def as_json(options = nil) # :nodoc:
  to_i
end

#before(time = ::Time.current)

Alias for #ago.

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 448


alias :before :ago

#coerce(other)

This method is for internal use only.

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 245


def coerce(other) # :nodoc:
  case other
  when Scalar
    [other, self]
  when Duration
    [Scalar.new(other.value), self]
  else
    [Scalar.new(other), self]
  end
end

#encode_with(coder)

This method is for internal use only.

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 467


def encode_with(coder) # :nodoc:
  coder.map = { "value" => @value, "parts" => @parts }
end

#eql?(other) ⇒ `Boolean`

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

[ 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.

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 439


alias :from_now :since

#hash

[ 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

[ 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

[ 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

[ 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

[ 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.

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 380


alias :in_seconds :to_i

#in_weeks

Returns the amount of weeks a duration covers as a float

2.months.in_weeks # => 8.696

[ 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

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 420


def in_years
  in_seconds / SECONDS_PER_YEAR.to_f
end

#init_with(coder)

This method is for internal use only.

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 463


def init_with(coder) # :nodoc:
  initialize(coder["value"], coder["parts"])
end

#inspect

This method is for internal use only.

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 450


def inspect # :nodoc:
  return "#{value} seconds" if @parts.empty?

  @parts.
    sort_by { |unit,  _ | PARTS.index(unit) }.
    map     { |unit, val| "#{val} #{val == 1 ? unit.to_s.chop : unit.to_s}" }.
    to_sentence(locale: false)
end

#instance_of?(klass) ⇒ `Boolean`

This method is for internal use only.

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 335


def instance_of?(klass) # :nodoc:
  Duration == klass || value.instance_of?(klass)
end

#is_a?(klass) ⇒ `Boolean` Also known as: #kind_of?

This method is for internal use only.

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 330


def is_a?(klass) # :nodoc:
  Duration == klass || value.is_a?(klass)
end

#iso8601(precision: nil)

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

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 473


def iso8601(precision: nil)
  ISO8601Serializer.new(self, precision: precision).serialize
end

#kind_of?(klass)

Alias for #is_a?.

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 333


alias :kind_of? :is_a?

#parts

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

5.minutes.parts # => {:minutes=>5}
3.years.parts # => {:years=>3}

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 241


def parts
  @parts.dup
end

#raise_type_error(other) (private)

Raises:

(TypeError)

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 520


def raise_type_error(other)
  raise TypeError, "no implicit conversion of #{other.class} into #{self.class}"
end

#respond_to_missing?(method, _) ⇒ `Boolean` (private)

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 512


def respond_to_missing?(method, _)
  value.respond_to?(method)
end

#since(time = ::Time.current) Also known as: #from_now, #after

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

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 436


def since(time = ::Time.current)
  sum(1, time)
end

#sum(sign, time = ::Time.current) (private)

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 486


def sum(sign, time = ::Time.current)
  unless time.acts_like?(:time) || time.acts_like?(:date)
    raise ::ArgumentError, "expected a time or date, got #{time.inspect}"
  end

  if @parts.empty?
    time.since(sign * value)
  else
    @parts.each do |type, number|
      t = time
      time =
        if type == :seconds
          t.since(sign * number)
        elsif type == :minutes
          t.since(sign * number * 60)
        elsif type == :hours
          t.since(sign * number * 3600)
        else
          t.advance(type => sign * number)
        end
    end

    time
  end
end

#to_i Also known 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.

[ 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"

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 353


def to_s
  @value.to_s
end

#until(time = ::Time.current)

Alias for #ago.

[ GitHub ]

# File 'activesupport/lib/active_support/duration.rb', line 447


alias :until :ago

Class: ActiveSupport::Duration

Overview

Constant Summary

Class Method Summary

Instance Attribute Summary

Instance Method Summary

Constructor Details

.new(value, parts, variable = nil) ⇒ Duration

Dynamic Method Handling

#method_missing (private)

Class Method Details

.===(other)

.build(value)

.calculate_total_seconds(parts) (private)

.days(value)

.hours(value)

.minutes(value)

.months(value)

.parse(iso8601duration)

.seconds(value)

.weeks(value)

.years(value)

Instance Attribute Details

#value (readonly)

#variable? ⇒ Boolean (readonly)

Instance Method Details

#%(other)

#*(other)

#+(other)

#+@

#-(other)

#-@

#/(other)

#<=>(other)

#==(other)

#_parts

#after(time = ::Time.current)

#ago(time = ::Time.current) Also known as: #until, #before

#as_json(options = nil)

#before(time = ::Time.current)

#coerce(other)

#encode_with(coder)

#eql?(other) ⇒ Boolean

#from_now(time = ::Time.current)

#hash

#in_days

#in_hours

#in_minutes

#in_months

#in_seconds

#in_weeks

#in_years

#init_with(coder)

#inspect

#instance_of?(klass) ⇒ Boolean

#is_a?(klass) ⇒ Boolean Also known as: #kind_of?

#iso8601(precision: nil)

#kind_of?(klass)

#parts

#raise_type_error(other) (private)

#respond_to_missing?(method, _) ⇒ Boolean (private)

#since(time = ::Time.current) Also known as: #from_now, #after

#sum(sign, time = ::Time.current) (private)

#to_i Also known as: #in_seconds

#to_s

#until(time = ::Time.current)

.new(value, parts, variable = nil) ⇒ `Duration`

#variable? ⇒ `Boolean` (readonly)

#eql?(other) ⇒ `Boolean`

#instance_of?(klass) ⇒ `Boolean`

#is_a?(klass) ⇒ `Boolean` Also known as: #kind_of?

#respond_to_missing?(method, _) ⇒ `Boolean` (private)