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# File activesupport/lib/active_support/core_ext/date_time/conversions.rb, line 77 77: def self.civil_from_format(utc_or_local, year, month=1, day=1, hour=0, min=0, sec=0) 78: offset = utc_or_local.to_sym == :local ? local_offset : 0 79: civil(year, month, day, hour, min, sec, offset) 80: end
Returns Time.zone.now.to_datetime when Time.zone or config.time_zone are set, otherwise returns Time.now.to_datetime.
DateTimes aren’t aware of DST rules, so use a consistent non-DST offset when creating a DateTime with an offset in the local zone
Layers additional behavior on DateTime#<=> so that Time and ActiveSupport::TimeWithZone instances can be compared with a DateTime
Duck-types as a Date-like class. See Object#acts_like?.
Duck-types as a Time-like class. See Object#acts_like?.
Uses Date to provide precise Time calculations for years, months, and days. The options parameter takes a hash with any of these keys: :years, :months, :weeks, :days, :hours, :minutes, :seconds.
# File activesupport/lib/active_support/core_ext/date_time/calculations.rb, line 51 51: def advance(options) 52: d = to_date.advance(options) 53: datetime_advanced_by_date = change(:year => d.year, :month => d.month, :day => d.day) 54: seconds_to_advance = (options[:seconds] || 0) + (options[:minutes] || 0) * 60 + (options[:hours] || 0) * 3600 55: seconds_to_advance == 0 ? datetime_advanced_by_date : datetime_advanced_by_date.since(seconds_to_advance) 56: end
Returns a new DateTime representing the time a number of seconds ago Do not use this method in combination with x.months, use months_ago instead!
Alias for beginning_of_day
Alias for beginning_of_hour
Alias for beginning_of_day
Returns a new DateTime representing the start of the day (0:00)
Returns a new DateTime representing the start of the hour (hh:00:00)
Returns a new DateTime where one or more of the elements have been changed according to the options parameter. The time options (hour, minute, sec) reset cascadingly, so if only the hour is passed, then minute and sec is set to 0. If the hour and minute is passed, then sec is set to 0.
# File activesupport/lib/active_support/core_ext/date_time/calculations.rb, line 34 34: def change(options) 35: ::DateTime.civil( 36: options[:year] || year, 37: options[:month] || month, 38: options[:day] || day, 39: options[:hour] || hour, 40: options[:min] || (options[:hour] ? 0 : min), 41: options[:sec] || ((options[:hour] || options[:min]) ? 0 : sec), 42: options[:offset] || offset, 43: options[:start] || start 44: ) 45: end
Alias for inspect
Returns a new DateTime representing the end of the day (23:59:59)
Returns a new DateTime representing the end of the hour (hh:59:59)
Returns the utc_offset as an +HH:MM formatted string. Examples:
datetime = DateTime.civil(2000, 1, 1, 0, 0, 0, Rational(-6, 24)) datetime.formatted_offset # => "-06:00" datetime.formatted_offset(false) # => "-0600"
Tells whether the DateTime object’s datetime lies in the future
Alias for utc
Alias for since
Returns the simultaneous time in Time.zone.
Time.zone = 'Hawaii' # => 'Hawaii' DateTime.new(2000).in_time_zone # => Fri, 31 Dec 1999 14:00:00 HST -10:00
This method is similar to Time#localtime, except that it uses Time.zone as the local zone instead of the operating system’s time zone.
You can also pass in a TimeZone instance or string that identifies a TimeZone as an argument, and the conversion will be based on that zone instead of Time.zone.
DateTime.new(2000).in_time_zone('Alaska') # => Fri, 31 Dec 1999 15:00:00 AKST -09:00
Alias for beginning_of_day
Tells whether the DateTime object’s datetime lies in the past
Overrides the default inspect method with a human readable one, e.g., “Mon, 21 Feb 2005 14:30:00 +0000”.
Seconds since midnight: DateTime.now.seconds_since_midnight
Returns a new DateTime representing the time a number of seconds since the instance time Do not use this method in combination with x.months, use months_since instead!
Converts self to a Ruby Date object; time portion is discarded.
To be able to keep Times, Dates and DateTimes interchangeable on conversions.
Alias for to_s
Converts self to a floating-point number of seconds since the Unix epoch.
Convert to a formatted string. See Time::DATE_FORMATS for predefined formats.
This method is aliased to to_s.
Examples
datetime = DateTime.civil(2007, 12, 4, 0, 0, 0, 0) # => Tue, 04 Dec 2007 00:00:00 +0000 datetime.to_formatted_s(:db) # => "2007-12-04 00:00:00" datetime.to_s(:db) # => "2007-12-04 00:00:00" datetime.to_s(:number) # => "20071204000000" datetime.to_formatted_s(:short) # => "04 Dec 00:00" datetime.to_formatted_s(:long) # => "December 04, 2007 00:00" datetime.to_formatted_s(:long_ordinal) # => "December 4th, 2007 00:00" datetime.to_formatted_s(:rfc822) # => "Tue, 04 Dec 2007 00:00:00 +0000"
Adding your own datetime formats to to_formatted_s
DateTime formats are shared with Time. You can add your own to the Time::DATE_FORMATS hash. Use the format name as the hash key and either a strftime string or Proc instance that takes a time or datetime argument as the value.
# config/initializers/time_formats.rb
Time::DATE_FORMATS[:month_and_year] = "%B %Y"
Time::DATE_FORMATS[:short_ordinal] = lambda { |time| time.strftime("%B #{time.day.ordinalize}") }
# File activesupport/lib/active_support/core_ext/date_time/conversions.rb, line 35 35: def to_formatted_s(format = :default) 36: if formatter = ::Time::DATE_FORMATS[format] 37: formatter.respond_to?(:call) ? formatter.call(self).to_s : strftime(formatter) 38: else 39: to_default_s 40: end 41: end
Converts self to an integer number of seconds since the Unix epoch.
Adjusts DateTime to UTC by adding its offset value; offset is set to 0
Example:
DateTime.civil(2005, 2, 21, 10, 11, 12, Rational(-6, 24)) # => Mon, 21 Feb 2005 10:11:12 -0600 DateTime.civil(2005, 2, 21, 10, 11, 12, Rational(-6, 24)).utc # => Mon, 21 Feb 2005 16:11:12 +0000
Returns true if offset == 0
Returns the offset value in seconds