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Class: ActiveSupport::Duration

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

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.

Instance Attribute Summary

Instance Method Summary

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args, &block) (private)

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# File 'activesupport/lib/active_support/duration.rb', line 507

def method_missing(method, *args, &block)
  value.public_send(method, *args, &block)
end

Class Method Details

.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}
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# 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 Duration::ISO8601Parser::ParsingError.

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# File 'activesupport/lib/active_support/duration.rb', line 144

def parse(iso8601duration)
  parts = ISO8601Parser.new(iso8601duration).parse!
  new(calculate_total_seconds(parts), parts)
end

Instance Attribute Details

#value (readonly)

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

attr_reader :value

Instance Method Details

#%(other)

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

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# File 'activesupport/lib/active_support/duration.rb', line 307

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.

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

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.

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# File 'activesupport/lib/active_support/duration.rb', line 263

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.

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# File 'activesupport/lib/active_support/duration.rb', line 277

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

#/(other)

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

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# File 'activesupport/lib/active_support/duration.rb', line 293

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.

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# File 'activesupport/lib/active_support/duration.rb', line 253

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.

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# File 'activesupport/lib/active_support/duration.rb', line 336

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

#after(time = ::Time.current)

Alias for #since.

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# File 'activesupport/lib/active_support/duration.rb', line 435

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.

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

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

#before(time = ::Time.current)

Alias for #ago.

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# File 'activesupport/lib/active_support/duration.rb', line 443

alias :before :ago

#eql?(other) ⇒ Boolean

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

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# File 'activesupport/lib/active_support/duration.rb', line 421

def eql?(other)
  Duration === other && other.value.eql?(value)
end

#from_now(time = ::Time.current)

Alias for #since.

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# File 'activesupport/lib/active_support/duration.rb', line 434

alias :from_now :since

#hash

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# File 'activesupport/lib/active_support/duration.rb', line 425

def hash
  @value.hash
end

#in_days

Returns the amount of days a duration covers as a float

12.hours.in_days # => 0.5
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# File 'activesupport/lib/active_support/duration.rb', line 394

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
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# File 'activesupport/lib/active_support/duration.rb', line 387

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

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
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# File 'activesupport/lib/active_support/duration.rb', line 408

def in_months
  in_seconds / SECONDS_PER_MONTH.to_f
end

#in_seconds

Alias for #to_i.

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# File 'activesupport/lib/active_support/duration.rb', line 375

alias :in_seconds :to_i

#in_weeks

Returns the amount of weeks a duration covers as a float

2.months.in_weeks # => 8.696
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# File 'activesupport/lib/active_support/duration.rb', line 401

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
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# File 'activesupport/lib/active_support/duration.rb', line 415

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.

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# File 'activesupport/lib/active_support/duration.rb', line 468

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

#kind_of?(klass)

Alias for #is_a?.

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# File 'activesupport/lib/active_support/duration.rb', line 328

alias :kind_of? :is_a?

#parts

Returns a copy of the parts hash that defines the duration

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# File 'activesupport/lib/active_support/duration.rb', line 236

def parts
  @parts.dup
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.

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# File 'activesupport/lib/active_support/duration.rb', line 431

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

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# File 'activesupport/lib/active_support/duration.rb', line 372

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"
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# File 'activesupport/lib/active_support/duration.rb', line 348

def to_s
  @value.to_s
end

#until(time = ::Time.current)

Alias for #ago.

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# File 'activesupport/lib/active_support/duration.rb', line 442

alias :until :ago