$ resource service .success不是一个函数

Question

我想用AngularJS,Node和MongoDB实现登录方法.我已经在我发送请求时构建了一个Restful API.

当我尝试执行GET请求时,控制台上会出现此错误 TypeError: UserService.logIn(...).success is not a function

成功不存在的$http方式？

我也找到了这个,但我无法理解如何调整它以适应我的代码.

• HTTP GET"类"操作:Resource.action([parameters],[success],[error])

• 非GET"类"操作:Resource.action([parameters],postData,[success],[error])

• 非GET实例操作:实例.$ action([参数],[成功],[错误])

Service.js

var appServices = angular.module('starter.services', ['ngResource']);

appServices.factory('UserService', function ($resource) {
    return {
        logIn: function (email, password) {
            return $resource("http://localhost:3000/users/login", {
                email: email,
                password: password
            });
        }
    }
});

Controller.js

    var apps = angular.module('starter.controller', []);
apps.controller('loginCtrl', function ($scope, $ionicPopup, $state, UserService) {

    $scope.doLogin = function doLogin(email, password) {


        if (email != null && password != null) {

            UserService.logIn(email, password).success(function (data) {
                $state.go('tabs.home');

            }).error(function (status, data) {

                var ionicPop = $ionicPopup.alert({
                    title: 'Login Failed',
                    template: 'Invalid email or password.\nPlease try again!'
                });
                console.log(status);
                console.log(data);
            });
        }
    };
});

Answer 1

您的UserService.logIn()方法没有按预期运行的原因是,您正在返回一个新实例,Resource但实际上从未在其上调用方法.

// This returns an instance of Resource, which is configured incorrectly.
// The second argument suggests that the URL has :email and :password
// parameters, which it does not. As a result, the email and password
// would be appended to the URL as query params (very insecure!).
return $resource("http://localhost:3000/users/login", {
    email: email,
    password: password
}); 

随着$资源,您可以定义其他方法或修改现有的get,save,query和delete方法.但是,这仅适用于支持CRUD操作的 API端点.

对于登录调用,您不需要创建资源,因为您不会执行CRUD操作.请$http改用.

var appServices = angular.module('starter.services', ['ngResource']);

appServices.factory('authService', function ($http) {
    return {
        logIn: function (email, password) {
            return $http({
                url: 'http://localhost:3000/users/login',
                method: 'POST',
                data: {
                    email: email,
                    password: password
                },
                headers: {
                    'Content-Type': 'application/json'
                },
                withCredentials: true
            });
        }
    }
});

上面的示例假定您要在请求正文中传递用户凭据.假设您使用SSL,这是可以的,但首选方法是使用Authorization标头.例如,Basic Auth会更安全一些.

UPDATE

事实证明,方法$resource不返回Promise.它们使用$promise属性返回资源的实例.所以,你可以这样做:

// Using the .save() method, which performs a POST
$resource('http://localhost:3000/users/login').save({email: 'foo@bar.com', password: 'baz'})
    .$promise.then(handleSuccess, handleError);

不过,我建议使用$http登录端点.但是,如果你需要使用$resource,请看看这个plunker.