DateTime marshaler for attr_encrypted

date_time_marshaller.rb

require "attr_encrypted"
require "active_support/core_ext/date_time"

module DateTimeMarshaler
  FORMAT = "%F %H:%M:%S"

  def self.dump(datetime)
    datetime.strftime(FORMAT)
  end

  def self.load(string)
    DateTime.parse(string)
  end
end

class Thing
  attr_encrypted :datetime, marshal: true, 
                            marshaler: DateTimeMarshaler, 
                            dump_method: :dump, 
                            load_method: :load, 
                            key: "secret"
end

marshaled = DateTimeMarshaler.dump(Time.now) # => "2015-05-21 11:42:20"
DateTimeMarshaler.load(marshaled) # => Thu, 21 May 2015 11:42:20 +0000

thing = Thing.new
thing.datetime = Time.now
thing.datetime # => 2015-05-21 11:42:20 -0700