我的目标是在有效后自动保存表单并使用超时对其进行更新。我设置为：

(function(window, angular, undefined) {
    'use strict';
    angular.module('nodblog.api.article', ['restangular'])
        .config(function (RestangularProvider) {
            RestangularProvider.setBaseUrl('/api');
            RestangularProvider.setRestangularFields({
                id: "_id"
            });
            RestangularProvider.setRequestInterceptor(function(elem, operation, what) {
                if (operation === 'put') {
                    elem._id = undefined;
                    return elem;
                }
                return elem;
            }); 
        })
        .provider('Article', function() {
            this.$get = function(Restangular) {
                function ngArticle() {};
                ngArticle.prototype.articles = Restangular.all('articles');
                ngArticle.prototype.one = function(id) {
                    return Restangular.one('articles', id).get();
                };
                ngArticle.prototype.all = function() {
                    return this.articles.getList();
                };
                ngArticle.prototype.store = function(data) {
                    return this.articles.post(data);
                };
                ngArticle.prototype.copy = function(original) {
                    return  Restangular.copy(original);
                };
                return new ngArticle;
            }
    })
})(window, angular);

angular.module('nodblog',['nodblog.route'])
.directive("autosaveForm", function($timeout,Article) {
    return {
        restrict: "A",
        link: function (scope, element, attrs) {
            var id = null;
            scope.$watch('form.$valid', function(validity) {
                if(validity){
                    Article.store(scope.article).then(
                        function(data) {
                            scope.article = Article.copy(data);
                            _autosave();
                        }, 
                        function error(reason) {
                            throw new Error(reason);
                        }
                    );
                }  
            })
            function _autosave(){
                    scope.article.put().then(
                    function() {
                        $timeout(_autosave, 5000); 
                    },
                    function error(reason) {
                        throw new Error(reason);
                    }
                );
            }
        }
    }
})

.controller('CreateCtrl', function ($scope,$location,Article) {
        $scope.article = {};
        $scope.save = function(){
            if(typeof $scope.article.put === 'function'){
                $scope.article.put().then(function() {
                    return $location.path('/blog');
                });
            }
            else{
                Article.store($scope.article).then(
                    function(data) {
                        return $location.path('/blog');
                    }, 
                    function error(reason) {
                        throw new Error(reason);
                    }
                );
            }
        };
     })

我想知道是否有最佳方法。