rollbackDirtyChildren EmberJS

# rollback target and related models
# http://stackoverflow.com/questions/19362584/how-to-rollback-changes-to-hasmany-in-ember-data
rollbackDirtyRecords = (context, transition) ->
  relationships = Em.get(App[context.modelName.camelize().titleize()], "relationshipsByName")
  content = context.get('controller.content')
  transition.then ->
    relationships.forEach (name, relationship) ->
      relatedModel = content.get(name)
      relatedModel.rollback() if relatedModel? and relatedModel.get('isDirty')

    content.rollback() if content.get("isDirty")
  true