Angular2 - 返回在map函数中创建的对象的可观察对象

Question

说我有这个功能......

public getStuff(): Observable<Stuff> {
     return.http.get('url')
          .map(res => res.json())
          .map((data: Piece) => {
               var stuff = new Stuff();
               // Apply logic to "data", modify stuff model, return stuff to subscriber
          });
}

如何将stuff对象返回给观察者而不是Piece类型的“数据”？

Answer 1

如果您使用代码块，则需要明确的return：

public getStuff(): Observable<Stuff> {
     return.http.get('url')
          .map(res => res.json())
          .map((data: Piece) => {
               var stuff = new Stuff();
               return stuff;
          });
}