angular - 如何在角度中使用 *ngFor 迭代“携带数组的对象”？

Question

我正在尝试遍历包含数组的对象，但出现错误“找不到类型为 'object' 的不同支持对象 '[object Object]'。NgFor 仅支持绑定到 Iterables，例如数组。” 以下是我的 json 回复：

data={"books": [{"title": "A","edition": 3,"year": 2011 },
{"title": "B","edition": 2,"year": 2009},
{"title": "C","edition": 2,"year": 2008}],
"count":3
}

模板代码：

<tr *ngFor="let d of data">
<td>d.books.title</td>
</tr>

谁能建议需要进行哪些更改才能遍历数据？

Answer 1

您需要使用数组，即data.books

<tr *ngFor="let d of data.books">
<td>{{d.title}}</td> //edited after looking at comments
</tr>

Answer 2

In your .ts file is : Declare the data object
  data =
      {"books": 
      [
        {"title": "A","edition": 3,"year": 2011 },
        {"title": "B","edition": 2,"year": 2009},
        {"title": "C","edition": 2,"year": 2008}
      ],
        "count":3
      }

In your .html file:

<table>
    <tr *ngFor="let d of data.books">
     <td>{{d.title}}</td>
    </tr>
</table>

我试过了..它对我有用！