@json_view(permission='update_milestone', validators=(validate_file_update, validate_plan_not_terminated))
def put(self):
    self.update_modified_dates()
    return super(PlanMilestoneDocumentResource, self).put()
@json_view(permission='update_milestone', validators=(validate_file_update, validate_plan_not_terminated))
def put(self):
    self.update_modified_dates()
    return super(PlanMilestoneDocumentResource, self).put()