class ActiveSupport::Duration

def inspect #:nodoc:
  consolidated = parts.inject(::Hash.new(0)) { |h,(l,r)| h[l] += r; h }
  parts = [:years, :months, :days, :minutes, :seconds].map do |length|
    n = consolidated[length]
    "#{n} #{n == 1 ? length.to_s.singularize : length.to_s}" if n.nonzero?
  end.compact
  parts = ["0 seconds"] if parts.empty?
  parts.to_sentence(:locale => :en)
end