CoffeeScript mixins in Backbone

This will allow you to use mixins in your Backbone models, views, collections, and routers.

include = (mixins...) ->
    throw new Error('include(mixins...) requires at least one mixin') unless mixins and mixins.length > 0

    for mixin in mixins
      for key, value of mixin
        @::[key] = value unless key is 'included'

      mixin.included?.apply(this)
    this

Backbone.Model.include = Backbone.Collection.include = include
Backbone.View.include = Backbone.Router.include = include

Then you can do:

Foo =
  # Executes when included
  included: ->
    @message = 'Hello World!'

  # This method will be mixed in
  bar: -> console.log @message

class MyView extends Backbone.View
  @include Foo

view = new MyView
view.bar()  # prints 'Hello World!