AngularJS - 如何取消承诺？

Question

假设我有一个输入文本字段(更像是Google搜索字段),当更改时,它会触发请求并显示一些结果.

例如,

让我们Dog在输入中输入:

typed D -> Calls ctrl.search('D') -> Makes a request -> Changes model when success
typed DO -> Calls ctrl.search('DO') -> Makes a request -> Changes model when success
typed DOG -> Calls ctrl.search('DOG') -> Makes a request -> Changes model when success.

现在,假设DO请求的响应时间晚于响应请求DOG.DO即使我打字,我的模型也会得到结果DOG.

为此,如果我继续键入字符,我需要一种方法来取消或中止当前正在进行的请求.这样,我的模型只会被最终请求更改.

我的输入如下所示:

<input type="text" class="form-control" data-ng-model="query" data-ng-change="ctrl.search(query)" placeholder="Search" />

这是我的searchCtrl.js:

var search;
var language;
var _this;

var SearchCtrl = function (searchService, lang)
{
     search = searchService;
     langauge = lang;
     _this = this;
}

SearchCtrl.prototype.search = function (text)
{
    var promise = search.language(language)
                  .facet('characters')
                  .highlight('quotes')
                  .query(text);

    promise.then(function (response) {
         if(!response) return;
         _this.total = response.total;
         _this.count = response.found;
         _this.result = response.data;
    });
}

Answer 1

通常对于这种情况人们使用ng-model-options={debounce: 100}.

https://docs.angularjs.org/api/ng/directive/ngModelOptions

无论如何你可以拒绝承诺。