在 angular 中使用 RxJS 运算符转换响应数据

Question

我有如下服务响应。

  "amount": 3330,
  "count": 56,
  "dataObjects": [
    {
      "links": {
        "self": "http://localhost:4200/api/collection/"
      },
      "id": "W391",
      "objectNumber": "IN-W391",
      "title": "Image 23",
      "webImage": {
        "guid": "89de22aa-e19f-4c83-87ff-26dd8f319c05",
        "width": 1200,
        "height": 800,
        "url": "http://localhost:4200/api/collection/7qzT0pbclLB7y3fdS1GxzMnV7m3gD3gWnhlquhFaJSn6gNOvMmTUAX3wVlTzhMXIs8kM9IH8AsjHNVTs8em3XQI6uMY=s0"
      }
    },
    {
      "links": {
        "self": "http://localhost:4200/api/collection/"
      },
      "id": "W391",
      "objectNumber": "IN-W391",
      "title": "Image 23",
      "webImage": {
        "guid": "89de22aa-e19f-4c83-87ff-26dd8f319c05",
        "width": 1200,
        "height": 800,
        "url": "http://localhost:4200/api/collection/7qzT0pbclLB7y3fdS1GxzMnV7m3gD3gWnhlquhFaJSn6gNOvMmTUAX3wVlTzhMXIs8kM9IH8AsjHNVTs8em3XQI6uMY=s0"
      }
    }
  ]
}

我想做的就是只检索 dataObjects 数组，这样我就可以遍历它并绑定 url 在 webImage 下显示在 UI 中。这是我试过的

Component.ts

ngOnInit() {
this.artistService.GetArtistDetails().pipe(map( response=> response.dataObjects))
    .subscribe((artists: any[])=>{
      console.log(artists);
    });  
  }
}

Service.ts

 public GetArtistDetails(){
    return this.httpClient.get(this.REST_API_SERVER);
  }

提前致谢

Answer 1

除了 A2Ia 所说的，这里还有一个示例代码可以正常工作：

stackblitz 应用：https://stackblitz.com/edit/angular-ivy-1ixvmx?file=src/app/app.component.ts

结果：https://angular-ivy-1ixvmx.stackblitz.io

在 angular 中使用 RxJS 运算符转换响应数据

Transform response data with RxJS Operators in angular

javascript

angular

angular-httpclient