我有一个简单的服务,内容如下:
import { Injectable } from '@angular/core';
import { Http, Response } from '@angular/http';
import 'rxjs/add/observable/throw';
import 'rxjs/add/operator/catch';
import 'rxjs/add/operator/map';
import { Observable } from 'rxjs/Observable';
@Injectable()
export class AddressService {
constructor(private http: Http) { }
getAnything = (): Observable<Response> => {
return this.http.get('https://my_api.com')
.map(this.handleSuccess)
.catch(this.handleError);
}
handleError = (error: Response): Observable<Response> => {
return Observable.throw(error || 'Server Error');
}
handleSuccess = (response: Response): Observable<Response> => {
let body;
if (response.text()) {
body = response.json();
}
return body || {};
}
}
一切都很完美,直到我把Typescript版本从2.3.4升级到2.4.1。
现在,在升级后,我遇到了一个奇怪的错误:
Type 'Observable<Response | Observable<Response>>' is not assignable to type 'Observable<Response>'
这里的关键是什么?TS 2.4.x有哪些变化会导致我的应用程序无法正常工作?
handleSuccess
函数上,它没有返回Observable
,而只是返回类似 JSON 的对象,对吗? - Nodarii