Converting datetimes to formatted strings, dates, and times.

Methods
F
R
T
X
Instance Public methods
formatted_offset(colon = true, alternate_utc_string = nil)

Returns the utc_offsetas 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"
# File activesupport/lib/active_support/core_ext/date_time/conversions.rb, line 58
def formatted_offset(colon = true, alternate_utc_string = nil)
  utc? && alternate_utc_string || utc_offset.to_utc_offset_s(colon)
end
readable_inspect()

Overrides the default inspect method with a human readable one, e.g., “Mon, 21 Feb 2005 14:30:00 +0000”

# File activesupport/lib/active_support/core_ext/date_time/conversions.rb, line 63
def readable_inspect
  to_s(:rfc822)
end
to_date()

Converts self to a Ruby Date object; time portion is discarded

# File activesupport/lib/active_support/core_ext/date_time/conversions.rb, line 68
def to_date
  ::Date.new(year, month, day)
end
to_datetime()

To be able to keep Times, Dates and DateTimes interchangeable on conversions

# File activesupport/lib/active_support/core_ext/date_time/conversions.rb, line 79
def to_datetime
  self
end
to_f()

Converts self to a floating-point number of seconds since the Unix epoch

# File activesupport/lib/active_support/core_ext/date_time/conversions.rb, line 89
def to_f
  seconds_since_unix_epoch.to_f
end
to_formatted_s(format = :default)

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 48
def to_formatted_s(format = :default)
  return to_default_s unless formatter = ::Time::DATE_FORMATS[format]
  formatter.respond_to?(:call) ? formatter.call(self).to_s : strftime(formatter)
end
to_i()

Converts self to an integer number of seconds since the Unix epoch

# File activesupport/lib/active_support/core_ext/date_time/conversions.rb, line 94
def to_i
  seconds_since_unix_epoch.to_i
end
to_time()

Attempts to convert self to a Ruby Time object; returns self if out of range of Ruby Time class If self has an offset other than 0, self will just be returned unaltered, since there's no clean way to map it to a Time

# File activesupport/lib/active_support/core_ext/date_time/conversions.rb, line 74
def to_time
  self.offset == 0 ? ::Time.utc_time(year, month, day, hour, min, sec) : self
end
xmlschema()

Converts datetime to an appropriate format for use in XML

# File activesupport/lib/active_support/core_ext/date_time/conversions.rb, line 84
def xmlschema
  strftime("%Y-%m-%dT%H:%M:%S%Z")
end