相关疑难解决方法(0)

在我的Angular 2应用程序中,我有后端服务,如下所示.

getUserInterests() {
    return this.http.get('http://localhost:8080/test/selections').map((res: Response) => res.json());
}

在调用此服务后,我想在上一个服务成功之前调用另一个服务.

第二次服务

let params: URLSearchParams = new URLSearchParams();
    params.set('access_token', localStorage.getItem('access_token'));
    return this.http.get('http://localhost:8080/user/selections', { search: params }).map((res: Response) => res.json());

这两个服务分别返回两个JSON数组.然后我需要用这两个数组进行一些登录.

EDITED

service.ts

getUserInterests() {
    return this.http.get('http://localhost:8080/test/selections').map((res: Response) => res.json());
}

getSavedSelections() {
    let params: URLSearchParams = new URLSearchParams();
    params.set('access_token', localStorage.getItem('access_token'));
    return this.http.get('http://localhost:8080/interest/user/selections', { search: params }).map((res: Response) => res.json());
}

getSelectionList() {
    var obs = this.getUserInterests().flatMap(
        (interests) => {
            return Observable.forkJoin([
                Observable.of(interests),
                this.getSavedSelections()
            ]);
        }
    );
    return obs;
}

然后我在我的其他ts文件中使用以下来调用该服务. …