属性＆＃x27; concatmap＆＃x27;在类型上不存在

Question

请帮忙，我试图从Angular发送一个请求...当我尝试使用ConcatMap时，我会收到错误，

public updateUser(token: string, requestBody: any): Observable<User> {
        const myHeaders = new HttpHeaders({ 'Accept': 'application/json', 'Content-Type': 'application/json', 'Authorization': 'Bearer ' + token });
        return this.http.put<User>(this.baseUrl + "api/user", requestBody, { headers: myHeaders }).concatMap(data => {
            return of(data);
        });
      }

会收到以下错误。

Property 'concatMap' does not exist on type 'Observable<User>'.

我 仍然相同的错误

import 'rxjs/add/operator/concatMap';

import { concatMap } from 'rxjs/operators';

Answer 1

我能够通过将管道添加到我的代码中来解决此问题

public updateUser(token: string, requestBody: any): Observable<User> {
    const myHeaders = new HttpHeaders({ 'Accept': 'application/json', 'Content-Type': 'application/json', 'Authorization': 'Bearer ' + token });
    return this.http.put<User>(this.baseUrl + "api/user", requestBody, { headers: myHeaders })
    .pipe( 
    concatMap(data => {
        return of(data);
    })
);

}