gistfile1.coffee

# client = ...


class User
  
  constructor: (call_when_created) ->
    m = client.multi()
    m.incr "user_id"
    m.get "user_id", (e, r) ->
      @id = parseInt r, 10
      call_when_created this
    m.exec()


new User (user) ->
  console.log user.id