Question

当我将一组凭据发布到我的api并取回要存储的数据时，应执行登录过程时出现以下错误。

错误：TypeError：您提供了一个无效对象，其中流是预期。您可以提供一个Observable，Promise，Array或Iterable。

这是我的代码：我也尝试使用res['user_id']这个版本this.user['user_id']，而不是user = null; refreshToken = null; private authenticationState = new BehaviorSubject(false); public authenticationState$ = this.authenticationState.asObservable(); ... checkToken() { this.storage.get(TOKEN_KEY).then(access => { if (access) { this.user = this.helper.decodeToken(access); this.authenticationState.next(true); } else { this.storage.get(REFRESH_TOKEN_KEY).then(reaccess => { this.user = this.helper.decodeToken(reaccess); this.authenticationState.next(true); }); } }); } apilogin(username: string, password: string) { return this.http.post<any>(`http://127.0.0.1:8000/api/token/`, { username, password }) .pipe( switchMap((res: any) => { // run all in paralell return forkJoin( this.storage.set(TOKEN_KEY, res['access']), this.storage.set(USERNAME_KEY, username), this.storage.set(USER_ID, res['user_id']), this.user = this.helper.decodeToken(res['access']) ); }), // now we know for sure storage values have been set, // therefore call checkToken() tap(() => this.checkToken()), catchError(e => { this.showAlert('Oops smth went wrong!'); throw new Error(e); })); } apilogout() { this.storage.remove(USER_ID), this.storage.remove(REFRESH_TOKEN_KEY), this.storage.remove(USERNAME_KEY), this.storage.remove(TOKEN_KEY) }，但随后出现一个错误，提示它无法读取null的user_id。

首先，我的服务发布凭据并负责存储：

apiSubmit() {
  console.log('Hello World');
  this.submitted = true;

  // if form is invalid => stop
  if (this.loginForm.invalid) {
      return;
  }
  this.isLoading = true;
  this.loadingEl.present();
  this.authService.apilogin(
  this.f.username,
  this.f.password)
      .pipe(tap(x => this.loadingEl.dismiss()),
      )
      .subscribe(
        data => {
          console.log('0');
          this.router.navigate([this.returnUrl]);
        },
        error => {
          console.log('1');
          this.loadingEl.dismiss();
          this.error = error;
          console.log(error);
          this.isLoading = false;
        }
      );
}

这是我的登录页面。在这里，我总是出错，这就是记录此错误的地方。

GeometrySerializer

Answer 1

这看起来像您在forkJoin中的所有参数都是一个普通对象，它将不接受并向您抛出该错误。您可以使用rxjs将它们转换为可观察的超级简单，它应该可以正常工作。

 // import the of function
 import { of } from 'rxjs';

 // rest of your code goes here, just showing you have to import the above

 apilogin(username: string, password: string) {
    return this.http.post<any>(`http://127.0.0.1:8000/api/token/`, { username, password })
    .pipe(
        switchMap((res: any) => {
            this.user = this.helper.decodeToken(res['access'])
            // run all in paralell
            return forkJoin(
                of(this.storage.set(TOKEN_KEY, res['access'])),
                of(this.storage.set(USERNAME_KEY, username)),
                of(this.storage.set(USER_ID, res['user_id'])),
                of(this.user)
            );
          }),
    // now we know for sure storage values have been set,
    // therefore call checkToken()
        tap(() => this.checkToken()),
        catchError(e => {
            this.showAlert('Oops smth went wrong!');
            throw new Error(e);
        }));

}

如何在此函数中提供可观察的东西？

1 个答案: