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Class: Time

Constant Summary

::DateAndTime::Calculations - Included

DAYS_INTO_WEEK, WEEKEND_DAYS

Class Attribute Summary

Class Method Summary

Instance Attribute Summary

::DateAndTime::Compatibility - Included

::DateAndTime::Calculations - Included

#future?

Returns true if the date/time is in the future.

#next_day?
#on_weekday?

Returns true if the date/time does not fall on a Saturday or Sunday.

#on_weekend?

Returns true if the date/time falls on a Saturday or Sunday.

#past?

Returns true if the date/time is in the past.

#prev_day?
#today?

Returns true if the date/time is today.

#tomorrow

Returns a new date/time representing tomorrow.

#tomorrow?

Returns true if the date/time is tomorrow.

#yesterday

Returns a new date/time representing yesterday.

#yesterday?

Returns true if the date/time is yesterday.

Instance Method Summary

::DateAndTime::Calculations - Included

#after?

Returns true if the date/time falls after date_or_time.

#all_day

Returns a ::Range representing the whole day of the current date/time.

#all_month

Returns a ::Range representing the whole month of the current date/time.

#all_quarter

Returns a ::Range representing the whole quarter of the current date/time.

#all_week

Returns a ::Range representing the whole week of the current date/time.

#all_year

Returns a ::Range representing the whole year of the current date/time.

#at_beginning_of_month
#at_beginning_of_quarter
#at_beginning_of_week
#at_beginning_of_year
#at_end_of_month
#at_end_of_quarter
#at_end_of_week
#at_end_of_year
#before?

Returns true if the date/time falls before date_or_time.

#beginning_of_month

Returns a new date/time at the start of the month.

#beginning_of_quarter

Returns a new date/time at the start of the quarter.

#beginning_of_week

Returns a new date/time representing the start of this week on the given day.

#beginning_of_year

Returns a new date/time at the beginning of the year.

#days_ago

Returns a new date/time the specified number of days ago.

#days_since

Returns a new date/time the specified number of days in the future.

#days_to_week_start

Returns the number of days to the start of the week on the given day.

#end_of_month

Returns a new date/time representing the end of the month.

#end_of_quarter

Returns a new date/time at the end of the quarter.

#end_of_week

Returns a new date/time representing the end of this week on the given day.

#end_of_year

Returns a new date/time representing the end of the year.

#last_month

Short-hand for months_ago(1).

#last_quarter
#last_week
#last_weekday
#last_year

Short-hand for years_ago(1).

#monday

Returns Monday of this week assuming that week starts on Monday.

#months_ago

Returns a new date/time the specified number of months ago.

#months_since

Returns a new date/time the specified number of months in the future.

#next_occurring

Returns a new date/time representing the next occurrence of the specified day of week.

#next_quarter

Short-hand for months_since(3).

#next_week

Returns a new date/time representing the given day in the next week.

#next_weekday

Returns a new date/time representing the next weekday.

#prev_occurring

Returns a new date/time representing the previous occurrence of the specified day of week.

#prev_quarter

Short-hand for months_ago(3).

#prev_week

Returns a new date/time representing the given day in the previous week.

#prev_weekday

Returns a new date/time representing the previous weekday.

#quarter

Returns the quarter for a date/time.

#sunday

Returns Sunday of this week assuming that week starts on Monday.

#weeks_ago

Returns a new date/time the specified number of weeks ago.

#weeks_since

Returns a new date/time the specified number of weeks in the future.

#years_ago

Returns a new date/time the specified number of years ago.

#years_since

Returns a new date/time the specified number of years in the future.

::DateAndTime::Zones - Included

#in_time_zone

Returns the simultaneous time in .zone if a zone is given or if .zone_default is set.

Class Attribute Details

.zone (rw)

Returns the TimeZone for the current request, if this has been set (via .zone=). If zone has not been set for the current request, returns the TimeZone specified in config.time_zone.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/zones.rb', line 14

def zone
  ::ActiveSupport::IsolatedExecutionState[:time_zone] || zone_default
end

.zone=(time_zone) (rw)

Sets .zone to a TimeZone object for the current request/thread.

This method accepts any of the following:

  • A Rails TimeZone object.

  • An identifier for a Rails TimeZone object (e.g., “Eastern Time (US & Canada)”, -5.hours).

  • A TZInfo::Timezone object.

  • An identifier for a TZInfo::Timezone object (e.g., “America/New_York”).

Here’s an example of how you might set .zone on a per request basis and reset it when the request is done. current_user.time_zone just needs to return a string identifying the user’s preferred time zone:

class ApplicationController < ActionController::Base
  around_action :set_time_zone

  def set_time_zone
    if logged_in?
      Time.use_zone(current_user.time_zone) { yield }
    else
      yield
    end
  end
end
[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/zones.rb', line 41

def zone=(time_zone)
  ::ActiveSupport::IsolatedExecutionState[:time_zone] = find_zone!(time_zone)
end

.zone_default (rw)

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/zones.rb', line 10

attr_accessor :zone_default

Class Method Details

.===(other)

Overriding case equality method so that it returns true for ::ActiveSupport::TimeWithZone instances

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 18

def ===(other)
  super || (self == Time && other.is_a?(ActiveSupport::TimeWithZone))
end

.at(*args, **kwargs)

Alias for .at_with_coercion.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 60

alias_method :at, :at_with_coercion

.at_with_coercion(*args, **kwargs) Also known as: .at

Layers additional behavior on .at so that ::ActiveSupport::TimeWithZone and ::DateTime instances can be used when called with a single argument

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 45

def at_with_coercion(*args, **kwargs)
  return at_without_coercion(*args, **kwargs) if args.size != 1 || !kwargs.empty?

  # Time.at can be called with a time or numerical value
  time_or_number = args.first

  if time_or_number.is_a?(ActiveSupport::TimeWithZone)
    at_without_coercion(time_or_number.to_r).getlocal
  elsif time_or_number.is_a?(DateTime)
    at_without_coercion(time_or_number.to_f).getlocal
  else
    at_without_coercion(time_or_number)
  end
end

.at_without_coercion

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 59

alias_method :at_without_coercion, :at

.current

Returns Time.zone.now when .zone or config.time_zone are set, otherwise just returns Time.now.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 39

def current
  ::Time.zone ? ::Time.zone.now : ::Time.now
end

.days_in_month(month, year = current.year)

Returns the number of days in the given month. If no year is specified, it will use the current year.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 24

def days_in_month(month, year = current.year)
  if month == 2 && ::Date.gregorian_leap?(year)
    29
  else
    COMMON_YEAR_DAYS_IN_MONTH[month]
  end
end

.days_in_year(year = current.year)

Returns the number of days in the given year. If no year is specified, it will use the current year.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 34

def days_in_year(year = current.year)
  days_in_month(2, year) + 337
end

.find_zone(time_zone)

Returns a TimeZone instance matching the time zone provided. Accepts the time zone in any format supported by .zone=. Returns nil for invalid time zones.

Time.find_zone "America/New_York" # => #<ActiveSupport::TimeZone @name="America/New_York" ...>
Time.find_zone "NOT-A-TIMEZONE"   # => nil
[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/zones.rb', line 93

def find_zone(time_zone)
  find_zone!(time_zone) rescue nil
end

.find_zone!(time_zone)

Returns a TimeZone instance matching the time zone provided. Accepts the time zone in any format supported by .zone=. Raises an ArgumentError for invalid time zones.

Time.find_zone! "America/New_York" # => #<ActiveSupport::TimeZone @name="America/New_York" ...>
Time.find_zone! "EST"              # => #<ActiveSupport::TimeZone @name="EST" ...>
Time.find_zone! -5.hours           # => #<ActiveSupport::TimeZone @name="Bogota" ...>
Time.find_zone! nil                # => nil
Time.find_zone! false              # => false
Time.find_zone! "NOT-A-TIMEZONE"   # => ArgumentError: Invalid Timezone: NOT-A-TIMEZONE
[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/zones.rb', line 81

def find_zone!(time_zone)
  return time_zone unless time_zone

  ActiveSupport::TimeZone[time_zone] || raise(ArgumentError, "Invalid Timezone: #{time_zone}")
end

.rfc3339(str)

Creates a Time instance from an RFC 3339 string.

Time.rfc3339('1999-12-31T14:00:00-10:00') # => 2000-01-01 00:00:00 -1000

If the time or offset components are missing then an ArgumentError will be raised.

Time.rfc3339('1999-12-31') # => ArgumentError: invalid date

Raises:

  • (ArgumentError)
[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 69

def rfc3339(str)
  parts = Date._rfc3339(str)

  raise ArgumentError, "invalid date" if parts.empty?

  Time.new(
    parts.fetch(:year),
    parts.fetch(:mon),
    parts.fetch(:mday),
    parts.fetch(:hour),
    parts.fetch(:min),
    parts.fetch(:sec) + parts.fetch(:sec_fraction, 0),
    parts.fetch(:offset)
  )
end

.use_zone(time_zone)

Allows override of .zone locally inside supplied block; resets .zone to existing value when done.

class ApplicationController < ActionController::Base
  around_action :set_time_zone

  private
    def set_time_zone
      Time.use_zone(current_user.timezone) { yield }
    end
end

NOTE: This won’t affect any ::ActiveSupport::TimeWithZone objects that have already been created, e.g. any model timestamp attributes that have been read before the block will remain in the application’s default timezone.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/zones.rb', line 61

def use_zone(time_zone)
  new_zone = find_zone!(time_zone)
  begin
    old_zone, ::Time.zone = ::Time.zone, new_zone
    yield
  ensure
    ::Time.zone = old_zone
  end
end

Instance Attribute Details

#acts_like_time?Boolean (readonly)

Duck-types as a Time-like class. See Object#acts_like?.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/acts_like.rb', line 7

def acts_like_time?
  true
end

Instance Method Details

#+(other)

Alias for #plus_with_duration.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 308

alias_method :+, :plus_with_duration

#-(other) Also known as: #minus_without_coercion

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 328

alias_method :-, :minus_with_duration

#<=>(other)

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 343

alias_method :<=>, :compare_with_coercion

#advance(options)

Uses Date to provide precise Time calculations for years, months, and days according to the proleptic Gregorian calendar. The options parameter takes a hash with any of these keys: :years, :months, :weeks, :days, :hours, :minutes, :seconds.

Time.new(2015, 8, 1, 14, 35, 0).advance(seconds: 1) # => 2015-08-01 14:35:01 -0700
Time.new(2015, 8, 1, 14, 35, 0).advance(minutes: 1) # => 2015-08-01 14:36:00 -0700
Time.new(2015, 8, 1, 14, 35, 0).advance(hours: 1)   # => 2015-08-01 15:35:00 -0700
Time.new(2015, 8, 1, 14, 35, 0).advance(days: 1)    # => 2015-08-02 14:35:00 -0700
Time.new(2015, 8, 1, 14, 35, 0).advance(weeks: 1)   # => 2015-08-08 14:35:00 -0700

Just like Date#advance, increments are applied in order of time units from largest to smallest. This order can affect the result around the end of a month.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 202

def advance(options)
  unless options[:weeks].nil?
    options[:weeks], partial_weeks = options[:weeks].divmod(1)
    options[:days] = options.fetch(:days, 0) + 7 * partial_weeks
  end

  unless options[:days].nil?
    options[:days], partial_days = options[:days].divmod(1)
    options[:hours] = options.fetch(:hours, 0) + 24 * partial_days
  end

  d = to_date.gregorian.advance(options)
  time_advanced_by_date = change(year: d.year, month: d.month, day: d.day)
  seconds_to_advance = \
    options.fetch(:seconds, 0) +
    options.fetch(:minutes, 0) * 60 +
    options.fetch(:hours, 0) * 3600

  if seconds_to_advance.zero?
    time_advanced_by_date
  else
    time_advanced_by_date.since(seconds_to_advance)
  end
end

#ago(seconds)

Returns a new Time representing the time a number of seconds ago, this is basically a wrapper around the ::Numeric extension

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 228

def ago(seconds)
  since(-seconds)
end

#at_beginning_of_day

Alias for #beginning_of_day.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 246

alias :at_beginning_of_day :beginning_of_day

#at_beginning_of_hour

Alias for #beginning_of_hour.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 273

alias :at_beginning_of_hour :beginning_of_hour

#at_beginning_of_minute

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 289

alias :at_beginning_of_minute :beginning_of_minute

#at_end_of_day

Alias for #end_of_day.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 267

alias :at_end_of_day :end_of_day

#at_end_of_hour

Alias for #end_of_hour.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 283

alias :at_end_of_hour :end_of_hour

#at_end_of_minute

Alias for #end_of_minute.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 298

alias :at_end_of_minute :end_of_minute

#at_midday

Alias for #middle_of_day.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 254

alias :at_midday :middle_of_day

#at_middle_of_day

Alias for #middle_of_day.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 256

alias :at_middle_of_day :middle_of_day

#at_midnight

Alias for #beginning_of_day.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 245

alias :at_midnight :beginning_of_day

#at_noon

Alias for #middle_of_day.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 255

alias :at_noon :middle_of_day

#beginning_of_day Also known as: #midnight, #at_midnight, #at_beginning_of_day

Returns a new Time representing the start of the day (0:00)

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 241

def beginning_of_day
  change(hour: 0)
end

#beginning_of_hour Also known as: #at_beginning_of_hour

Returns a new Time representing the start of the hour (x:00)

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 270

def beginning_of_hour
  change(min: 0)
end

#beginning_of_minute Also known as: #at_beginning_of_minute

Returns a new Time representing the start of the minute (x:xx:00)

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 286

def beginning_of_minute
  change(sec: 0)
end

#ceil(precision = 0)

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 121

def ceil(precision = 0)
  change(nsec: 0) + subsec.ceil(precision)
end

#change(options)

Returns a new Time where one or more of the elements have been changed according to the options parameter. The time options (:hour, :min, :sec, :usec, :nsec) reset cascadingly, so if only the hour is passed, then minute, sec, usec, and nsec is set to 0. If the hour and minute is passed, then sec, usec, and nsec is set to 0. The options parameter takes a hash with any of these keys: :year, :month, :day, :hour, :min, :sec, :usec, :nsec, :offset. Pass either :usec or :nsec, not both.

Time.new(2012, 8, 29, 22, 35, 0).change(day: 1)              # => Time.new(2012, 8, 1, 22, 35, 0)
Time.new(2012, 8, 29, 22, 35, 0).change(year: 1981, day: 1)  # => Time.new(1981, 8, 1, 22, 35, 0)
Time.new(2012, 8, 29, 22, 35, 0).change(year: 1981, hour: 0) # => Time.new(1981, 8, 29, 0, 0, 0)

Raises:

  • (ArgumentError)
[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 138

def change(options)
  new_year   = options.fetch(:year, year)
  new_month  = options.fetch(:month, month)
  new_day    = options.fetch(:day, day)
  new_hour   = options.fetch(:hour, hour)
  new_min    = options.fetch(:min, options[:hour] ? 0 : min)
  new_sec    = options.fetch(:sec, (options[:hour] || options[:min]) ? 0 : sec)
  new_offset = options.fetch(:offset, nil)

  if new_nsec = options[:nsec]
    raise ArgumentError, "Can't change both :nsec and :usec at the same time: #{options.inspect}" if options[:usec]
    new_usec = Rational(new_nsec, 1000)
  else
    new_usec = options.fetch(:usec, (options[:hour] || options[:min] || options[:sec]) ? 0 : Rational(nsec, 1000))
  end

  raise ArgumentError, "argument out of range" if new_usec >= 1000000

  new_sec += Rational(new_usec, 1000000)

  if new_offset
    ::Time.new(new_year, new_month, new_day, new_hour, new_min, new_sec, new_offset)
  elsif utc?
    ::Time.utc(new_year, new_month, new_day, new_hour, new_min, new_sec)
  elsif zone&.respond_to?(:utc_to_local)
    new_time = ::Time.new(new_year, new_month, new_day, new_hour, new_min, new_sec, zone)

    # When there are two occurrences of a nominal time due to DST ending,
    # `Time.new` chooses the first chronological occurrence (the one with a
    # larger UTC offset). However, for `change`, we want to choose the
    # occurrence that matches this time's UTC offset.
    #
    # If the new time's UTC offset is larger than this time's UTC offset, the
    # new time might be a first chronological occurrence. So we add the offset
    # difference to fast-forward the new time, and check if the result has the
    # desired UTC offset (i.e. is the second chronological occurrence).
    offset_difference = new_time.utc_offset - utc_offset
    if offset_difference > 0 && (new_time_2 = new_time + offset_difference).utc_offset == utc_offset
      new_time_2
    else
      new_time
    end
  elsif zone
    ::Time.local(new_sec, new_min, new_hour, new_day, new_month, new_year, nil, nil, isdst, nil)
  else
    ::Time.new(new_year, new_month, new_day, new_hour, new_min, new_sec, utc_offset)
  end
end

#compare_with_coercion(other) Also known as: #<=>

Layers additional behavior on #<=> so that ::DateTime and ::ActiveSupport::TimeWithZone instances can be chronologically compared with a Time

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 332

def compare_with_coercion(other)
  # we're avoiding Time#to_datetime and Time#to_time because they're expensive
  if other.class == Time
    compare_without_coercion(other)
  elsif other.is_a?(Time)
    compare_without_coercion(other.to_time)
  else
    to_datetime <=> other
  end
end

#compare_without_coercion

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 342

alias_method :compare_without_coercion, :<=>

#end_of_day Also known as: #at_end_of_day

Returns a new Time representing the end of the day, 23:59:59.999999

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 259

def end_of_day
  change(
    hour: 23,
    min: 59,
    sec: 59,
    usec: Rational(999999999, 1000)
  )
end

#end_of_hour Also known as: #at_end_of_hour

Returns a new Time representing the end of the hour, x:59:59.999999

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 276

def end_of_hour
  change(
    min: 59,
    sec: 59,
    usec: Rational(999999999, 1000)
  )
end

#end_of_minute Also known as: #at_end_of_minute

Returns a new Time representing the end of the minute, x:xx:59.999999

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 292

def end_of_minute
  change(
    sec: 59,
    usec: Rational(999999999, 1000)
  )
end

#eql?(other)

Alias for #eql_with_coercion.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 353

alias_method :eql?, :eql_with_coercion

#eql_with_coercion(other) Also known as: #eql?

Layers additional behavior on #eql? so that ::ActiveSupport::TimeWithZone instances can be eql? to an equivalent Time

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 347

def eql_with_coercion(other)
  # if other is an ActiveSupport::TimeWithZone, coerce a Time instance from it so we can do eql? comparison
  other = other.comparable_time if other.respond_to?(:comparable_time)
  eql_without_coercion(other)
end

#eql_without_coercion

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 352

alias_method :eql_without_coercion, :eql?

#floor(precision = 0)

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 112

def floor(precision = 0)
  change(nsec: 0) + subsec.floor(precision)
end

#formatted_offset(colon = true, alternate_utc_string = nil)

Returns a formatted string of the offset from UTC, or an alternative string if the time zone is already UTC.

Time.local(2000).formatted_offset        # => "-06:00"
Time.local(2000).formatted_offset(false) # => "-0600"
[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/conversions.rb', line 69

def formatted_offset(colon = true, alternate_utc_string = nil)
  utc? && alternate_utc_string || ActiveSupport::TimeZone.seconds_to_utc_offset(utc_offset, colon)
end

#in(seconds)

Alias for #since.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 238

alias :in :since

#midday

Alias for #middle_of_day.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 252

alias :midday :middle_of_day

#middle_of_day Also known as: #midday, #noon, #at_midday, #at_noon, #at_middle_of_day

Returns a new Time representing the middle of the day (12:00)

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 249

def middle_of_day
  change(hour: 12)
end

#midnight

Alias for #beginning_of_day.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 244

alias :midnight :beginning_of_day

#minus_with_coercion(other) Also known as: #-

#- can also be used to determine the number of seconds between two Time instances. We’re layering on additional behavior so that ::ActiveSupport::TimeWithZone instances are coerced into values that #- will recognize

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 323

def minus_with_coercion(other)
  other = other.comparable_time if other.respond_to?(:comparable_time)
  other.is_a?(DateTime) ? to_f - other.to_f : minus_without_coercion(other)
end

#minus_without_coercion(other)

Alias for #-.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 327

alias_method :minus_without_coercion, :-

#minus_without_duration

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 317

alias_method :minus_without_duration, :-

#next_day(days = 1)

Returns a new time the specified number of days in the future.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 361

def next_day(days = 1)
  advance(days: days)
end

#next_month(months = 1)

Returns a new time the specified number of months in the future.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 371

def next_month(months = 1)
  advance(months: months)
end

#next_year(years = 1)

Returns a new time the specified number of years in the future.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 381

def next_year(years = 1)
  advance(years: years)
end

#noon

Alias for #middle_of_day.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 253

alias :noon :middle_of_day

#plus_without_duration

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 307

alias_method :plus_without_duration, :+

#prev_day(days = 1)

Returns a new time the specified number of days ago.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 356

def prev_day(days = 1)
  advance(days: -days)
end

#prev_month(months = 1)

Returns a new time the specified number of months ago.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 366

def prev_month(months = 1)
  advance(months: -months)
end

#prev_year(years = 1)

Returns a new time the specified number of years ago.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 376

def prev_year(years = 1)
  advance(years: -years)
end

#rfc3339

Aliased to xmlschema for compatibility with ::DateTime

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/conversions.rb', line 74

alias_method :rfc3339, :xmlschema

#sec_fraction

Returns the fraction of a second as a Rational

Time.new(2012, 8, 29, 0, 0, 0.5).sec_fraction # => (1/2)
[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 107

def sec_fraction
  subsec
end

#seconds_since_midnight

Returns the number of seconds since 00:00:00.

Time.new(2012, 8, 29,  0,  0,  0).seconds_since_midnight # => 0.0
Time.new(2012, 8, 29, 12, 34, 56).seconds_since_midnight # => 45296.0
Time.new(2012, 8, 29, 23, 59, 59).seconds_since_midnight # => 86399.0
[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 91

def seconds_since_midnight
  to_i - change(hour: 0).to_i + (usec / 1.0e+6)
end

#seconds_until_end_of_day

Returns the number of seconds until 23:59:59.

Time.new(2012, 8, 29,  0,  0,  0).seconds_until_end_of_day # => 86399
Time.new(2012, 8, 29, 12, 34, 56).seconds_until_end_of_day # => 41103
Time.new(2012, 8, 29, 23, 59, 59).seconds_until_end_of_day # => 0
[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 100

def seconds_until_end_of_day
  end_of_day.to_i - to_i
end

#since(seconds) Also known as: #in

Returns a new Time representing the time a number of seconds since the instance time

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/calculations.rb', line 233

def since(seconds)
  self + seconds
rescue
  to_datetime.since(seconds)
end

#to_default_s

Deprecated.

use to_s instead

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/conversions.rb', line 61

alias_method :to_default_s, :to_s

#to_formatted_s(format = :default)

Alias for #to_fs.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/conversions.rb', line 60

alias_method :to_formatted_s, :to_fs

#to_fs(format = :default) Also known as: #to_formatted_s

Converts to a formatted string. See DATE_FORMATS for built-in formats.

This method is aliased to #to_formatted_s.

time = Time.now                    # => 2007-01-18 06:10:17 -06:00

time.to_fs(:time)                  # => "06:10"
time.to_formatted_s(:time)         # => "06:10"

time.to_fs(:db)           # => "2007-01-18 06:10:17"
time.to_fs(:number)       # => "20070118061017"
time.to_fs(:short)        # => "18 Jan 06:10"
time.to_fs(:long)         # => "January 18, 2007 06:10"
time.to_fs(:long_ordinal) # => "January 18th, 2007 06:10"
time.to_fs(:rfc822)       # => "Thu, 18 Jan 2007 06:10:17 -0600"
time.to_fs(:iso8601)      # => "2007-01-18T06:10:17-06:00"

Adding your own time formats to to_fs

You can add your own formats to the DATE_FORMATS hash. Use the format name as the hash key and either a strftime string or Proc instance that takes a time argument as the value.

# config/initializers/time_formats.rb
Time::DATE_FORMATS[:month_and_year] = '%B %Y'
Time::DATE_FORMATS[:short_ordinal]  = ->(time) { time.strftime("%B #{time.day.ordinalize}") }
[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/conversions.rb', line 53

def to_fs(format = :default)
  if formatter = DATE_FORMATS[format]
    formatter.respond_to?(:call) ? formatter.call(self).to_s : strftime(formatter)
  else
    to_s
  end
end

#to_time

Either return self or the time in the local system timezone depending on the setting of ActiveSupport.to_time_preserves_timezone.

[ GitHub ]

  
# File 'activesupport/lib/active_support/core_ext/time/compatibility.rb', line 13

def to_time
  preserve_timezone ? self : getlocal
end