在我的Vue应用程序中,我正在遍历一系列学校。每所学校都有一个名字,一系列教师计数(每个年级一个),以及一系列学生计数(每个年级一个)。
以下代码有效,但仅限于我正在手动编码<td>
。
new Vue({
el: '#app',
data: {
schools: [
{ name: 'Lincoln', teachers: [3, 4, 1], students: [55, 42, 39] },
{ name: 'Oak Grove', teachers: [1, 2, 1], students: [31, 36, 23] },
{ name: 'Fairview', teachers: [1, 3, 2], students: [30, 26, 39] },
],
},
});
&#13;
thead th,
tbody td { text-align: center; }
&#13;
<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.0.0-beta/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.3.4/vue.min.js"></script>
<table id="app" class="table">
<thead>
<tr>
<th rowspan="2"></th>
<th colspan="2">Grade K</th>
<th colspan="2">Grade 1</th>
<th colspan="2">Grade 2</th>
</tr>
<tr>
<th>Teachers</th>
<th>Students</th>
<th>Teachers</th>
<th>Students</th>
<th>Teachers</th>
<th>Students</th>
</tr>
</thead>
<tbody>
<tr v-for="school in schools">
<th>{{ school.name }}</th>
<td>{{ school.teachers[0] }}</td>
<td>{{ school.students[0] }}</td>
<td>{{ school.teachers[1] }}</td>
<td>{{ school.students[1] }}</td>
<td>{{ school.teachers[2] }}</td>
<td>{{ school.students[2] }}</td>
</tr>
</tbody>
</table>
&#13;
注意重复的行:
<td>{{ school.teachers[x] }}</td>
<td>{{ school.students[x] }}</td>
这个简化的例子并没有太大的问题。但在我的真实项目中,还有更多列和子列。 有没有办法让重复循环显示<td>
?
我尝试了另一个v-for循环,但由于它位于<tr>
内,因此只允许<td>
和<th>
。
答案 0 :(得分:5)
假设教师和学生阵列始终的长度相同,则可以迭代template
标签。
<tr v-for="school in schools">
<th>{{ school.name }}</th>
<template v-for="(cnt, idx) in school.teachers.length">
<td>{{ school.teachers[idx] }}</td>
<td>{{ school.students[idx] }}</td>
</template>
</tr>
实施例。
new Vue({
el: '#app',
data: {
schools: [
{ name: 'Lincoln', teachers: [2, 2, 2], students: [40, 40, 40] },
{ name: 'Oak Grove', teachers: [2, 2, 2], students: [40, 40, 40] },
{ name: 'Fairview', teachers: [2, 2, 2], students: [40, 40, 40] },
],
},
});
&#13;
thead th,
tbody td { text-align: center; }
&#13;
<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.0.0-beta/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.3.4/vue.min.js"></script>
<table id="app" class="table">
<thead>
<tr>
<th rowspan="2"></th>
<th colspan="2">Grade K</th>
<th colspan="2">Grade 1</th>
<th colspan="2">Grade 2</th>
</tr>
<tr>
<th>Teachers</th>
<th>Students</th>
<th>Teachers</th>
<th>Students</th>
<th>Teachers</th>
<th>Students</th>
</tr>
</thead>
<tbody>
<tr v-for="school in schools">
<th>{{ school.name }}</th>
<template v-for="(cnt, idx) in school.teachers.length">
<td>{{ school.teachers[idx] }}</td>
<td>{{ school.students[idx] }}</td>
</template>
</tr>
</tbody>
</table>
&#13;
另一种方法是将重复的元素抽象为一个组件并使用special is
attribute(<td is="details" v-for="..."></td>
)。