Question

此代码有问题。我正在尝试从辅助端点收集与第一次获取的返回集合中的id有关的其他详细信息。有人可以帮忙如何在返回可观察值数组时获取实际数据。谢谢

crypto.createHmac(
  CONSTANTS.HMAC_ALORITHM_SHA,
  Buffer.from(
    secretAccessKey,
    CONSTANTS.BASE64_ENCODING
  )
).update(
  Buffer.from(
    stringToSign, 
    CONSTANTS.UTF8
  )
).digest(
  CONSTANTS.BASE64_ENCODING
);

Answer 1

您可以使用map来代替switchMap：

forkJoin

如果要保留该值，可以尝试执行以下操作：

this.http.get(`${this.apiUrl}/cinemas/location/cardiff`).pipe(
  map((data: any) => data.cinemas),
  switchMap((cinemas) => forkJoin(cinemas.map(value => <Observable<any>>this.http.get(`https://api.cinelist.co.uk/get/cinema/${value.id}`));
  }))
).subscribe(results => {
  console.log(results);
});

Answer 2

this.http.get(`https://api.cinelist.co.uk/search/cinemas/location/${town}`).pipe(
      map((data: any) => data.cinemas),
      flatMap((cinemas) =>
        forkJoin(
          cinemas.map(value => {
            return this.http.get(`https://api.cinelist.co.uk/get/cinema/${value.id}`).pipe(
              map((result: any) => {
                return { ...result, ...value };
              }));
          })
        )
      )
    ).subscribe(x => {
      console.log(x);
    });

无法从内部可观测对象检索数据

2 个答案: