缺少 rxjs 平面图 [英] rxjs flatmap missing

问题描述

我尝试链接多个 rx.js observables 并传递数据.Flatmap 应该是拟合运算符，但导入了

I try to chain multiple rx.js observables and pass the data. Flatmap should be the fitting operator but with an import of

import { Observable } from 'rxjs/Observable';

未找到:

Error TS2339: Property 'flatmap' does not exist on type 'Observable<Coordinates>'

使用的是 rx.js 的 5.0.0-beta.6 版本.

Version 5.0.0-beta.6 of rx.js is used.

public getCurrentLocationAddress():Observable<String> {
    return Observable.fromPromise(Geolocation.getCurrentPosition())
      .map(location => location.coords)
      .flatmap(coordinates => {
        console.log(coordinates);
        return this.http.request(this.geoCodingServer + "/json?latlng=" + coordinates.latitude + "," + coordinates.longitude)
          .map((res: Response) => {
                       let data = res.json();
                       return data.results[0].formatted_address;
              });
      });
  }

推荐答案

事实证明答案很简单:

这个操作符在这个版本的rxjs中叫做mergeMap

the operator is called mergeMap in this version of rxjs

此外，您可能需要使用 import 'rxjs/add/operator/mergeMap'.

Furthermore, you might have to use import 'rxjs/add/operator/mergeMap'.

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