### Home Classes Methods

### In Files

- lib/active_support/duration.rb

### Parent

ActiveSupport::BasicObject

### Methods

- #+
- #-
- #==
- #ago
- #from_now
- #since
- #until

### Class/Module Index

Quicksearch

- ActiveSupport
- ActiveSupport::Autoload
- ActiveSupport::BacktraceCleaner
- ActiveSupport::Base64
- ActiveSupport::BasicObject
- ActiveSupport::Benchmarkable
- ActiveSupport::BufferedLogger
- ActiveSupport::BufferedLogger::Severity
- ActiveSupport::Cache
- ActiveSupport::Cache::Entry
- ActiveSupport::Cache::FileStore
- ActiveSupport::Cache::MemCacheStore
- ActiveSupport::Cache::MemoryStore
- ActiveSupport::Cache::NullStore
- ActiveSupport::Cache::Store
- ActiveSupport::Cache::Strategy
- ActiveSupport::Cache::Strategy::LocalCache
- ActiveSupport::Cache::Strategy::LocalCache::LocalStore
- ActiveSupport::Callbacks
- ActiveSupport::Callbacks::ClassMethods
- ActiveSupport::Concern
- ActiveSupport::Configurable
- ActiveSupport::Configurable::ClassMethods
- ActiveSupport::Configurable::Configuration
- ActiveSupport::Dependencies
- ActiveSupport::Dependencies::ClassCache
- ActiveSupport::Dependencies::WatchStack
- ActiveSupport::Deprecation
- ActiveSupport::DescendantsTracker
- ActiveSupport::Duration
- ActiveSupport::FileUpdateChecker
- ActiveSupport::FileWatcher
- ActiveSupport::FileWatcher::Backend
- ActiveSupport::Gzip
- ActiveSupport::Gzip::Stream
- ActiveSupport::HashWithIndifferentAccess
- ActiveSupport::HashWithIndifferentAccess
- ActiveSupport::Inflector
- ActiveSupport::Inflector::Inflections
- ActiveSupport::InheritableOptions
- ActiveSupport::JSON
- ActiveSupport::JSON::Encoding
- ActiveSupport::JSON::Encoding::CircularReferenceError
- ActiveSupport::JSON::Encoding::Encoder
- ActiveSupport::JSON::Variable
- ActiveSupport::LogSubscriber
- ActiveSupport::LogSubscriber::TestHelper
- ActiveSupport::LogSubscriber::TestHelper::MockLogger
- ActiveSupport::Memoizable
- ActiveSupport::Memoizable::InstanceMethods
- ActiveSupport::MessageEncryptor
- ActiveSupport::MessageEncryptor::InvalidMessage
- ActiveSupport::MessageVerifier
- ActiveSupport::MessageVerifier::InvalidSignature
- ActiveSupport::Multibyte
- ActiveSupport::Multibyte::Chars
- ActiveSupport::Multibyte::EncodingError
- ActiveSupport::Multibyte::Unicode
- ActiveSupport::Multibyte::Unicode::Codepoint
- ActiveSupport::Multibyte::Unicode::UnicodeDatabase
- ActiveSupport::Notifications
- ActiveSupport::Notifications::Event
- ActiveSupport::Notifications::Fanout
- ActiveSupport::Notifications::Instrumenter
- ActiveSupport::OrderedHash
- ActiveSupport::OrderedOptions
- ActiveSupport::Railtie
- ActiveSupport::Rescuable
- ActiveSupport::Rescuable::ClassMethods
- ActiveSupport::SafeBuffer
- ActiveSupport::SafeBuffer::SafeConcatError
- ActiveSupport::StringInquirer
- ActiveSupport::TaggedLogging
- ActiveSupport::TestCase
- ActiveSupport::Testing
- ActiveSupport::Testing::Assertions
- ActiveSupport::Testing::Declarative
- ActiveSupport::Testing::Isolation
- ActiveSupport::Testing::Isolation::Forking
- ActiveSupport::Testing::Isolation::MiniTest
- ActiveSupport::Testing::Isolation::Subprocess
- ActiveSupport::Testing::Isolation::TestUnit
- ActiveSupport::Testing::Pending
- ActiveSupport::Testing::Performance
- ActiveSupport::Testing::Performance::Benchmarker
- ActiveSupport::Testing::Performance::ForClassicTestUnit
- ActiveSupport::Testing::Performance::ForMiniTest
- ActiveSupport::Testing::Performance::Metrics
- ActiveSupport::Testing::Performance::Metrics::Amount
- ActiveSupport::Testing::Performance::Metrics::Base
- ActiveSupport::Testing::Performance::Metrics::CpuTime
- ActiveSupport::Testing::Performance::Metrics::DigitalInformationUnit
- ActiveSupport::Testing::Performance::Metrics::GcRuns
- ActiveSupport::Testing::Performance::Metrics::GcTime
- ActiveSupport::Testing::Performance::Metrics::Memory
- ActiveSupport::Testing::Performance::Metrics::Objects
- ActiveSupport::Testing::Performance::Metrics::ProcessTime
- ActiveSupport::Testing::Performance::Metrics::Time
- ActiveSupport::Testing::Performance::Metrics::UserTime
- ActiveSupport::Testing::Performance::Metrics::WallTime
- ActiveSupport::Testing::Performance::Performer
- ActiveSupport::Testing::Performance::Profiler
- ActiveSupport::Testing::ProxyTestResult
- ActiveSupport::Testing::RemoteError
- ActiveSupport::Testing::SetupAndTeardown
- ActiveSupport::Testing::SetupAndTeardown::ClassMethods
- ActiveSupport::Testing::SetupAndTeardown::ForClassicTestUnit
- ActiveSupport::Testing::SetupAndTeardown::ForMiniTest
- ActiveSupport::TimeWithZone
- ActiveSupport::TimeZone
- ActiveSupport::XmlMini
- ActiveSupport::XmlMini_LibXMLSAX
- ActiveSupport::XmlMini_LibXMLSAX::HashBuilder
- ActiveSupport::XmlMini_NokogiriSAX
- ActiveSupport::XmlMini_NokogiriSAX::HashBuilder
- Test
- Test::Unit
- Test::Unit::Collector
- Test::Unit::Collector::ObjectSpace
- Object
- Object::HashWithIndifferentAccess
- Object::MissingSourceFile
- ERB
- ERB::Util
- I18n
- I18n::Railtie
- LoadError
- LoadError
- Logger
- Logger::SimpleFormatter
- Array
- Base64
- Benchmark
- BigDecimal
- Class
- Date
- DateTime
- Enumerable
- FalseClass
- File
- Float
- Hash
- Integer
- Kernel
- Module
- NameError
- NilClass
- Numeric
- Process
- QualifiedConstUtils
- Range
- Regexp
- String
- Symbol
- Time
- TrueClass
- URI

No matching classes.

# ActiveSupport::Duration

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

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

### Attributes

parts[RW]
value[RW]

### Public Instance Methods

+(other) click to toggle source

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

    # File lib/active_support/duration.rb, line 21
    def +(other)
      if Duration === other
        Duration.new(value + other.value, @parts + other.parts)
      else
        Duration.new(value + other, @parts + [[:seconds, other]])
      end
    end

-(other) click to toggle source

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

    # File lib/active_support/duration.rb, line 31
    def -(other)
      self + (-other)
    end

==(other) click to toggle source

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

    # File lib/active_support/duration.rb, line 46
    def ==(other)
      if Duration === other
        other.value == value
      else
        other == value
      end
    end

ago(time = ::Time.current) click to toggle source

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

    # File lib/active_support/duration.rb, line 69
    def ago(time = ::Time.current)
      sum(-1, time)
    end

Also aliased as: until
from_now(time = ::Time.current) click to toggle source
Alias for: since
since(time = ::Time.current) click to toggle source

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

    # File lib/active_support/duration.rb, line 62
    def since(time = ::Time.current)
      sum(1, time)
    end

Also aliased as: from_now
until(time = ::Time.current) click to toggle source
Alias for: ago

[Validate]

Generated with the Darkfish Rdoc Generator 2.