无法在角度网络服务中解析 toPromise

问题描述

我正在尝试创建一个非常简单的角度服务:

I am trying to create a very simple angular service:

import { Http, Response } from '@angular/http';
import 'rxjs/add/operator/toPromise';

export class Webservice {

  constructor(private http: Http) {

  }

  getMessages() {
    return this.http.get('http://localhost:63962/api/someshittyendpoint').toPromise();
  }
}

无论我做什么，我都会得到以下 Module not found: Error: Can't resolve 'rxjs/add/operator/toPromise'.

Whatever I do, I get the following Module not found: Error: Can't resolve 'rxjs/add/operator/toPromise'.

我已经安装了 rxjs-compat 并验证了该模块实际上在路径上.我不明白怎么回事?

I have installed rxjs-compat and verified that the module actually is on the path. I don't understand what's wrong?

提前致谢！

推荐答案

toPromise 不是运算符.它是 Observable 类上的一个方法，这意味着您不必导入它:

toPromise is not an operator. It's a method on the Observable class which means you don't have to import it:

查看源代码:https:///github.com/ReactiveX/rxjs/blob/5.5.11/src/Observable.ts#L332-L354

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