我怎样才能传回从AngularJS的服务的承诺？ [英] How can I pass back a promise from a service in AngularJS?

问题描述

我在控制器中的一些code被直接调用$ HTTP来获取数据。
现在我想这个移动到服务。以下是我迄今为止：

I have some code in my controller that was directly calling $http to get data. Now I would like to move this into a service. Here is what I have so far:

我的服务：

angular.module('adminApp', [])
.factory('TestAccount', function ($http) {
    var TestAccount = {};
    TestAccount.get = function (applicationId, callback) {
        $http({
            method: 'GET',
            url: '/api/TestAccounts/GetSelect',
            params: { applicationId: applicationId }
        }).success(function (result) {
            callback(result);
        });
    };
    return TestAccount;
});

里面的控制器：

   TestAccount.get(3, function (data) {
      $scope.testAccounts = data;
   })

我怎样才能改变这种做法，而不是传递成功的结果返回它
传回，我可以检查，看它是否成功或承诺失败了？

How can I change this so rather than passing the result of success back it passes back a promise that I can check to see if it succeeded or failed?

推荐答案

请您的服务来回报的承诺，并将其暴露给服务客户端。更改像这样的服务：

Make your service to return a promise and expose it to service clients. Change your service like so:

angular.module('adminApp', [])
.factory('TestAccount', function ($http) {
    var TestAccount = {};
    TestAccount.get = function (applicationId) {
        return $http({
            method: 'GET',
            url: '/api/TestAccounts/GetSelect',
            params: { applicationId: applicationId }
        });
    };
    return TestAccount;
});

所以控制器可以这样做：

so in a controller you can do:

TestAccount.get(3).then(function(result) {
   $scope.testAccounts = result.data;
}, function (result) {
    //error callback here...  
});

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