我如何使用.success和.error扩展Angularjs中的$ q promise [英] How can I extend $q promise in Angularjs with a .success and .error

问题描述

我在AngularJS的自定义服务中编写了这段小代码.

I wrote this little code in a custom service in AngularJS.

为我服务:

        var deferred = $q.defer();
        var promise = deferred.promise;

        deferred.resolve('success');
        deferred.reject('error');

        /* Handle success and error */
        promise.success = function(fn) {

            promise.then(function(response) {

                fn(response);

            });

            return promise;
        };

        promise.error = function(fn) {

            promise.then(null, function(response) {

                fn(response);

            });

            return promise;
        };

在我的控制器中:

        promiseService.myPromise()
            .success(function(data){

                $scope.success= data;

            })
            .error(function(data){

                $scope.error = data;

            });

我只是处理诺言中的成功和错误($ q服务).我在许多其他服务中都需要此代码，因此我将使用自定义直接扩展$ q服务.

I juste Handle the Success and Error from the promise ($q service). I need this code in a lot of other service so I would to extend directly the $q service with a custom.

因此，我希望在服务中提供类似的信息:

So I would like something like this in my service:

    var deferred = myPromiseService.$qCustom.defer();
    var promise = deferred.promise;

    deferred.resolve('success');
    deferred.reject('error');

    return promise;

有什么主意吗?我在Angularjs中找到了一些扩展过滤器的解释，我的问题是找到扩展$ q的所有功能并添加自定义的好方法.

Any idea? I found some explanation to extend filter in Angularjs my problem is to find the good way to extend all the functionality of the $q and add my custom.

我从这样的事情开始，开箱即用地处理$ q是可行的:

I start with something like that, it's work to handle the $q out of the box :

angular.module('myApp').service('myPromiseService', function($q){

  $qCustom = $q;  

});

推荐答案

这里是@jessegavin离开的完整解决方案.

Here's a full solution picking up where @jessegavin left off.

var myApp = angular.module("myApp", []);

myApp.config(function ($provide) {

  $provide.decorator('$q', function ($delegate) {
    var defer = $delegate.defer;
    $delegate.defer = function () {
      var deferred = defer();
      deferred.promise.success = function (fn) {
        deferred.promise.then(function(response) {
          fn(response.data, response.status, response.headers);
        });
      return deferred.promise;
      };
      deferred.promise.error = function (fn) {
        deferred.promise.then(null, function(response) {
          fn(response.data, response.status, response.headers);
        });
        return deferred.promise;
      };
      return deferred;
    };
    return $delegate;
  });

});

这篇关于我如何使用.success和.error扩展Angularjs中的$ q promise的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！