angular2 rxjs可观察到的forkjoin [英] angular2 rxjs observable forkjoin

问题描述

即使其中一个请求失败，是否也可以继续forkjoin http.get请求.

Is it possible to continue forkjoin http.get requests even if one of the requests fails.

我正在寻找类似的$ q.allSettled在angular2中的功能.

I'm looking to a similar function of $q.allSettled in angular2.

请参阅示例: http://jsfiddle.net/Zenuka/pHEf9/

angular.module('qAllSettled', []).config(function($provide) {
  $provide.decorator('$q', function($delegate) {
    var $q = $delegate;
    $q.allSettled = function(promises) {
      return $q.all(promises.map(function(promise) {
        return promise.then(function(value) {
          return { state: 'fulfilled', value: value };
        }, function(reason) {
          return { state: 'rejected', reason: reason };
        });
      }));
    };
    return $q;
  });
});

卡布

推荐答案

在这种情况下，您可以利用catch运算符为每个可观察对象拦截错误并返回另一个可观察对象.

You could leverage the catch operator for each observable to intercept the error and return another observable in such cases.

以下是示例:

return Observable.forkJoin(
  this.http.get('/some-url')
         .map((res:Response) => res.json())
         .catch(res:Response => Observable.of({}),
  this.http.get('/some-other-url')
         .map((res:Response) => res.json())
         .catch(res:Response => Observable.of({}),
);

这篇关于angular2 rxjs可观察到的forkjoin的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！