Angular 2从JSON中获取带有对象数组的对象

Question

我从json中获得了一个带有对象数组的对象，但是该类没有被填充，所以我得到了ndefined错误，这里是get：

  getFeatures()  {
    return this.http.get('http://localhost:8080/features')
      .map((response: Response) => response.json())
      .map(({features,Feature}) => new Features(features,Feature));
  }

在这里，我尝试使班级脱离课堂

public getFeatures(){
    this.featureService.getFeatures().subscribe(res => {
    this.featureArray = res.getFeatureArray();
    console.log("Uitkomst: "+ res);
    console.log("Uitkomst array: "+ res.getFeature(0).getID());
    //this.tekst = this.featureArray[0].getID();
    });

}

这是features.ts：

import {Feature} from "./Feature";
export class Features {

  constructor(public featuress: string , public feature : Feature[]){}

  public getFeature(i : number): Feature{
    return this.feature[i];
  }
  public getFeatureArray(): Feature[]{
    return this.feature;
  }

这是feature.ts：

export class Feature{

  constructor(public id : string, public name : string, public desciption : string, public keyword : string, public failedTest : boolean){}

  public getID(){
    return this.id;
  }

}

我也尝试将get更改为：

  getFeatures()  {
    return this.http.get('http://localhost:8080/features')
      .map((response: Response) => response.json())
      .map(({features,Feature[]}) => new Features(features,Feature[]));
  }

但它说：

，预期

' http：// localhost：8080 / features '= {"features":[{"id":"1","name":"feature1","description":"Dit is Feature 1","keyword":"Feature","failed":false},{"id":"2","name":"feature2","description":"Dit is Feature 2","keyword":"Feature","failed":false}]}

Answer 1

我的错在于，我现在将关键功能当作一个真正的字符串：

getFeatures()  {
    return this.http.get('http://localhost:8080/features')
      .map((response: Response) => response.json())
      .map(({features = [Feature]}) => new Features(features));
  }

这可行。