角度2中的嵌套循环 [英] Nested loops in angular 2

问题描述

我要显示此数组的数据:

I want to display the data of this array:

array = [
{nom: nom1, composants: [composant11, composant12]}, 
{nom: nom2, composants: [composant21, composant22]}
]

我想以这种方式在表格中显示它:

I want to display it this way in a table:

composant nom

composant11 nom1

composant11 nom1

composant12 nom1

composant12 nom1

composant21 nom2

composant21 nom2

composant22 nom2

composant22 nom2

这是我的代码:

<table>
<tr>
<th>Composant</th>
<th>Nom</th>
</tr>
<template *ngFor="let item of array">
<template *ngFor="let composant of item.composants">
<tr>
<td>{{composant.nom}}</td>
<td>{{composant.code}}</td>
</tr>
</template>
</template>
</table>

我的浏览器未显示任何内容.我想知道模板中是否真的有办法做到这一点.或者，如果我应该先在组件中转换数组，然后再显示它. 任何建议将不胜感激！

My browser is not showing anything. I wonder if really there is a way to do that in the template. Or if I should first transform the array in the component before displaying it. Any suggestion will be appreciated!

推荐答案

尝试一下:

rows = [
    {nom: "nom1", composants: ["composant11", "composant12"]}, 
    {nom: "nom2", composants: ["composant21", "composant22"]}
];

<table>
    <ng-container *ngFor="let row of rows">
        <tr *ngFor="let composant of row.composants">
            <td> {{ composant }} </td>
            <td> {{ row.nom }} </td>
        </tr>  
    <ng-container>  
</table>

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