Revert to last saved version using Backbone.js

gistfile1.coffee

Skepic.EventedModel = Backbone.Model.extend

  initialize: ->
    Backbone.Model.prototype.initialize.apply(@, arguments)
    _.bindAll(@, "mark_to_revert", "revert")
    @mark_to_revert()

  save : (attrs, options)->
    self = this
    options || (options = {})
    success = options.success
    options.success = (resp) ->
      self.trigger("save:success", self)
      success(self, resp) if (success)
      self.mark_to_revert()
    @trigger("save", this)
    value = Backbone.Model.prototype.save.call(this, attrs, options)
    return value

  mark_to_revert: ->
    @_revertAttributes = _.clone @attributes
  
  revert: ->
    @set(@_revertAttributes, {silent : true}) if @_revertAttributes