javascript - 遍历 http 响应 Angular2

Question

所以我是 Angular2 的新手，尝试遍历 http 响应我有点卡住了。使用以下代码:

  ngOnInit() {
    this._meetService.getAuth( "meets/"+ this.meetId + "/participants").subscribe(
      meet => {
        this.participants = meet.participants;
        this.organizators = meet.organizators;
        console.log(this.participants);
      },
      error => console.log("error")
    )
  }

我在 this.participants 和 this.organizators 中都获得了值，但具有以下内容:

  ngOnInit() {
    this._meetService.getAuth("meets/"+ this.meetId + "/participants").subscribe(
      meet => {
        meet.participants.forEach(participant => this.members.push(participant));
        meet.organizators.forEach(organizator => this.members.push(organizator));
        console.log(this.members);
      },
      error => console.log("error")
    )
  }

我记录了错误。怎么会这样？

这里是 getAuth() 方法:

@Injectable()
export class MeetService {
  constructor(private http: Http, public api: ApiConfig, private _routeParams: RouteParams) {}

  getAuth(path: string) {
    var auth = this.api.headers();
    auth.append("X-Auth-Key", "azertyuiop...");
    return this.http.get(this.api.getPath(path), {headers: auth})
      .map(res => <any> res.json())
  }

}

Answer 1

我认为你正在插入 this.members这是 undefined .先尝试初始化一下

ngOnInit() {
    this._meetService.getAuth("meets/"+ this.meetId + "/participants").subscribe(
      meet => {
        this.members = [];
        meet.participants.forEach(participant => this.members.push(participant));
        meet.organizators.forEach(organizator => this.members.push(organizator));
        console.log(this.members);
      },
      error => console.log("error")
    )
  }

设置members: Array<any>只是告诉 TypeScript 有一个 member应为 Array 类型的属性，但它不会为您创建属性。