javascript - AngularJS 最佳实践 - 具有多种方法的工厂

Question

我有一个工厂提供三种不同的 $http.get 方法。

angular.module('myApp')
	.factory('getFactory', function ($http, $q) {

	return {

		methodOne: function () {
			var deferred  = $q.defer();

			$http.get('path/to/data')
				.then(function successCallback (data) {
    					deferred.resolve(data);
    				},function errorCallback (response) {
                                        console.log(response);
                                });

			return deferred.promise;
		},

		methodTwo: function (arg1, arg2) {
			var deferred  = $q.defer();

			$http.get('path/to/' + arg1 + '/some/' + arg2 + 'more/data')
				.then(function successCallback (data) {
    					deferred.resolve(data);
    				},function errorCallback (response) {
                                        console.log(response);
                                });

			return deferred.promise;
		},

		methodThree: function (arg1, arg2, arg3) {
			var deferred  = $q.defer();

			$http.get('path/to/' + arg1 + '/some/' + arg2 + '/more/' + arg3 + '/data')
				.then(function successCallback (data) {
    					deferred.resolve(data);
    				},function errorCallback (response) {
                                        console.log(response);
                                });

			return deferred.promise;
		},
	};
	});

基本上，这些方法仅在获取数据的路径上有所不同。这些方法获取的数据在 Controller 中处理。我一边阅读了很多 Angular 最佳实践，一边看到了 DRY(不要重复自己)提示。

我觉得我上面的代码太重复了。有没有更好的方法来编写这种Angular 方式？

**注意:我使用 yeoman 生成器来构建我项目的目录。

Answer 1

angular.module('myApp')
    .factory('getFactory', function ($http, $q) {

    //Using revealing Module pattern
    var exposedAPI = {
        methodOne: methodOne,
        methodTwo: methodTwo,
        methodThree: methodThree
    };

    return exposedAPI;

    //Private function, not required to be exposed
    function get(url){
        //$http itself returns a promise, so no need to explicitly create another deferred object
        return $http.get(url)
                .then(function (data) {
                    //Create deferred object only if you want to manipulate returned data
                }, function (msg, code) {                       
                    console.log(msg, code);
                });
    }

    function methodOne() {
        //DRY
        return get('path/to/data');
    }

    function methodTwo(arg1, arg2) {
        return get('path/to/' + arg1 + '/some/' + arg2 + 'more/data');
    }

    function methodThree(arg1, arg2, arg3) {
        return get('path/to/' + arg1 + '/some/' + arg2 + '/more/' + arg3 + '/data');
    }
    });