Spine: made to work by using a controller instead of model

working.coffee

class Bar extends Spine.Model
  @configure "Bar"

class Foo extends Spine.Controller

  constructor: ->
    super
    Bar.bind("create", @barCreated)

  barCreated: (foo) =>
    @trigger("update", this)

class FooController extends Spine.Controller
  constructor: ->
    super
    @count = 0
    @foo.bind("update", @render)

  render: =>
    @count += 1
    console.log(@count)

# main
$(document).ready ->
  # this correctly calls FooController#render once!
  f = new Foo()
  new FooController(foo: f)
  new Bar().save()