Question

我有一个棱角分明的应用程序，并且正在通过服务呼叫进行后期请求。

但是我得到一个错误。但是服务呼叫发送了请求。因此，这是一个非常令人误解的错误。

这是我的方法：

sendEcheq(patientId: string) {
    if (this.sendEcheq.length > 0) {

      of(this.echeqsToSend)
        .pipe(
          mergeMap(echeqsToSend =>
            forkJoin(
              echeqsToSend.map((echeqFamily) =>
                this.echeqSubmissionMedicalService.createSubmissionBatch(1,   {
                  echeqFamilies: [
                    echeqFamily.family
                  ],
                  participants: [
                   patientId

                  ]
                }).subscribe(result => {
                  console.log(result);
                })
              )
            )
          )
        )
        .subscribe(
          result => {
            this.dialog.close();
            this.snackBar.open('De vcheq(s) zijn verstuurd', 'Ok');
          },
          error => {
            console.error('Server error when assigning vcheq', error);
            this.snackBar.open('Er ging iets mis bij het opsturen, probeer het later nog een keer', 'Ok');
            this.dialog.close();
          }
        );
    }
  }

因此，如果我执行服务方法：createSubmissionBatch，那么它将起作用。但我仍然收到此错误：

echeq-selector.component.ts:89 Server error when assigning vcheq TypeError: You provided an invalid object where a stream was expected. You can provide an Observable, Promise, Array, or Iterable.
    at subscribeTo (subscribeTo.js:41)
    at subscribeToResult (subscribeToResult.js:11)
    at new ForkJoinSubscriber (forkJoin.js:42)
    at Observable._subscribe (forkJoin.js:28)
    at Observable.push../node_modules/rxjs/_esm5/internal/Observable.js.Observable._trySubscribe (Observable.js:43)
    at Observable.push../node_modules/rxjs/_esm5/internal/Observable.js.Observable.subscribe (Observable.js:29)
    at subscribeTo.js:21
    at subscribeToResult (subscribeToResult.js:11)
    at MergeMapSubscriber.push../node_modules/rxjs/_esm5/internal/operators/mergeMap.js.MergeMapSubscriber._innerSub (mergeMap.js:74)
    at MergeMapSubscriber.push../node_modules/rxjs/_esm5/internal/operators/mergeMap.js.MergeMapSubscriber._tryNext (mergeMap.js:68)

我当然首先搜索了此错误。但是我只发现andswares与其他东西相关，例如这个answare：

TypeError: You provided an invalid object where a stream was expected. You can provide an Observable, Promise, Array, or Iterable

Answer 1

您将返回Subscription而不是流，因为您有一个内部.subscribe可打印结果。

您应该将结果通过管道传递到tap操作并打印到该位置，因为tap不会修改返回的流。

sendEcheq(patientId: string) {
  if (this.sendEcheq.length > 0) {
    of (this.echeqsToSend)
    .pipe(
      mergeMap(echeqsToSend =>
        forkJoin(
          echeqsToSend.map((echeqFamily) =>
              this.echeqSubmissionMedicalService.createSubmissionBatch(1, {
                  echeqFamilies: [
                      echeqFamily.family
                  ],
                  participants: [
                      patientId

                  ]
              }).pipe(
                  tap(result => console.log(reslult))
              )
          )
        )
      )
    ).subscribe(
      result => {
          this.dialog.close();
          this.snackBar.open('De vcheq(s) zijn verstuurd', 'Ok');
      },
      error => {
          console.error('Server error when assigning vcheq', error);
          this.snackBar.open('Er ging iets mis bij het opsturen, probeer het later nog een keer', 'Ok');
          this.dialog.close();
        }
    );
  }
}

从服务器发送请求时发生Mergemap错误

1 个答案: