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module ActiveSupport #:nodoc:
module CoreExtensions #:nodoc:
module DateTime #:nodoc:
# Getting datetimes in different convenient string representations and other objects.
#
# == Adding your own time formats in to_formatted_s
# You can add your own time formats by merging them into the ::Time::Conversions::DATE_FORMATS constant. Use a string with
# Ruby's strftime formatting (http://ruby-doc.org/core/classes/Time.html#M000297), or
# pass a lambda. The lambda yields the instance to_formatted_s is called on, so that calculations
# can be performed on that instance. This is handy when Ruby's strftime formatting is insufficient. See
# the +short_ordinal+ example below.
#
# See ActiveSupport::CoreExtensions::Time::Conversions::DATE_FORMATS for the list of built-in formats, and
# to_formatted_s for implementation details.
#
# === Examples:
# # config/initializers/time_formats.rb
# ActiveSupport::CoreExtensions::Time::Conversions::DATE_FORMATS.merge!(
# :month_and_year => "%B %Y",
# :short_ordinal => lambda { |time| time.strftime("%B #{time.day.ordinalize}") }
# )
#
# Calling it on a Time instance:
#
# Time.now.to_s(:short_ordinal)
module Conversions
def self.included(base) #:nodoc:
base.class_eval do
alias_method :to_datetime_default_s, :to_s
alias_method :to_s, :to_formatted_s
alias_method :default_inspect, :inspect
alias_method :inspect, :readable_inspect
# Ruby 1.9 has DateTime#to_time which internally relies on Time. We define our own #to_time which allows
# DateTimes outside the range of what can be created with Time.
remove_method :to_time if base.instance_methods.include?(:to_time)
end
end
# Convert to a formatted string - see DATE_FORMATS for predefined formats.
# You can also add your own formats to the DATE_FORMATS constant and use them with this method.
#
# This method is also aliased as <tt>to_s</tt>.
#
# === 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"
def to_formatted_s(format = :default)
if formatter = ::Time::DATE_FORMATS[format]
if formatter.respond_to?(:call)
formatter.call(self).to_s
else
strftime(formatter)
end
else
to_datetime_default_s
end
end
# Overrides the default inspect method with a human readable one, e.g., "Mon, 21 Feb 2005 14:30:00 +0000"
def readable_inspect
to_s(:rfc822)
end
# Converts self to a Ruby Date object; time portion is discarded
def to_date
::Date.new(year, month, day)
end
# 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
def to_time
self.offset == 0 ? ::Time.utc_time(year, month, day, hour, min, sec) : self
end
# To be able to keep Times, Dates and DateTimes interchangeable on conversions
def to_datetime
self
end
# Converts datetime to an appropriate format for use in XML
def xmlschema
strftime("%Y-%m-%dT%H:%M:%S%Z")
end if RUBY_VERSION < '1.9'
end
end
end
end
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