Question

我正在寻找角度为2的嵌套observable的解决方案。

我看到的大多数示例都涉及为初始请求返回的每个对象发出额外的http请求。在我的例子中，我想要对对象做出第一个请求，然后是第二个获取所有对象状态的请求，然后将它们连接在一起。

这是我到目前为止所做的：

getServicesAndStatuses(key: Key): Observable<Service[]> {
  return this.getServices(key)
    .flatMap((services: Service[]) => {
      if (services.length > 0) {
        return Observable.forkJoin(
          this.getEnvironmentStatus(key).map((statuses: ServiceStatus[]) => {
            services.forEach(service => {
              statuses.forEach(status => {
                if (status.virtualNetwork == key.virtualNetworkName && status.environment == key.environmentName && status.resource == service.resourceName && status.app == service.app.name) {
                  service.status = status;
                }
              });
              if (service.status == null) {
                service.status = new ServiceStatus();
              }
              console.log(service)
              return service;
            })
          })
        );
      }
      return Observable.of([]);
    });
}

我相信我错过了return因为console.log行正确显示了附加状态的服务对象。但我无法弄清楚我需要什么。

Answer 1

我自己修好了：

  getServicesAndStatuses(key: Key): Observable<Service[]> {
    return this.getEnvironmentServices(key)
      .flatMap((services: Service[]) => {
        return this.getEnvironmentStatus(key).map((statuses: ServiceStatus[]) => {
          services.forEach(service => {
            statuses.forEach(status => {
              if (status.virtualNetwork == key.virtualNetworkName && status.environment == key.environmentName && status.resource == service.resourceName && status.app == service.app.name) {
                service.status = status;
              }
            });
            if (service.status == null) {
              service.status = new ServiceStatus();
            }
            return service;
          });
          return services;
        })
      });
  }

Angular 2加入嵌套的observable

1 个答案: