Angular2 - 返回在map函数中创建的对象的可观察对象 [英] Angular2 - return observable of object created in map function

问题描述

说我有这个功能......

Say I have this function...

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数据类型为Piece？

How do I return the stuff object to the observer instead of the "data" of type Piece?

推荐答案

如果使用代码块，则需要显式 return ：

If you use a code block you need an explicit return:

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

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