Javascript 如何在AngularJS中中断/返回角度异步调用
我有以下项目结构:Javascript 如何在AngularJS中中断/返回角度异步调用,javascript,angularjs,asynchronous,angular-promise,Javascript,Angularjs,Asynchronous,Angular Promise,我有以下项目结构: -PageController.js -BusinessService.js -NetworkManager.js 在我的PageController中,我有以下调用: var getSomething = this._businessService.getMeSomething().then(function(response) { alert("my response: " + response); }); 在我的商务服务中: getMeSometing: f
-
PageController.js
-
BusinessService.js
-
NetworkManager.js
在我的PageController中,我有以下调用:
var getSomething = this._businessService.getMeSomething().then(function(response) {
alert("my response: " + response);
});
在我的商务服务中:
getMeSometing: function() {
var user = this.getUserData();
if(user) {
var sendPromise = this._networkManager.getAnotherThing(user.id).then(function(response) {
alert("And another response: " + response);
});
} else {
$q.reject({ message: 'Rejecting this promise' });
}
},
http调用是在NetworkManager
类中进行的。
所以这里的问题是,当我没有用户数据时,我想中断呼叫,因此我使用拒绝
这将返回一个错误:无法读取未定义的
关于调用PageController
因此,考虑到我的情况,如果我没有用户数据,我想取消请求,我如何才能做到这一点?您的呼叫应该会返回一个承诺。如果有用户,请从getAnotherThing
返回承诺,否则,请从$q.reject
返回承诺
getMeSomething: function() {
var user = this.getUserData();
var sendPromise;
if(user) {
sendPromise = this._networkManager.getAnotherThing(user.id).then(function(response) {
alert("And another response: " + response);
// you probably want to return the data if successful (either response or response.data, depending on what response is)
return response.data;
});
} else {
sendPromise = $q.reject({ message: 'Rejecting this promise' });
}
return sendPromise;
}