Backbone.Collection.prototype.ensureFetched = (callback) ->
  if (@_alreadyEnsureFetched)
    _refresher =>
      this.unbind('refresh', _refresher)
      callback.apply(this)
      @_alreadyEnsureFetched = true
    this.bind('refresh', _refresher)
    this.fetch()
  else
    callback.apply(this)

Backbone.View.prototype.attributes = ->
  attrs = {}
  for field in @attributeFields
    do (field) =>
      attrs[field] = this.$("input[name='#{field}']").val()
  attrs