Formatting time calculation

i don't know that there is a specific rails method to do that.
however, something like this should do the trick.

def hms(secs)
  h, secs = secs.divmod(3600)
  m, s = secs.divmod(60)
  h = h.to_s.rjust(2, "0")
  m = m.to_s.rjust(2, "0")
  s = s.round.to_s.rjust(2, "0")
  "#{h}:#{m}:#{s}"
end

put that in your application_helper.rb file

<%= hms(@object.duration_in_secs) -%>