如何点击清空按钮的时候将select框里面的值恢复默认值，这里的默认值是全部

[MissNanLan]

• I have searched the issues of this repository and believe that this is not a duplicate.

Version

1.3.5

Environment

windows 7 64位，谷歌浏览器70.0.3538.110（正式版本（32 位），Vue 2.6

Reproduction link

https://vue.ant.design/components/select-cn/

Steps to reproduce

HTML

<a-select  :defaultValue="emotionList[0].name" class="filter-item_select" @change="handleEmotionChange">
<a-select-option  :value="item.value"  v-for="item in emotionList" :key="item.id" >{{item.name}}</a-select-option>
</a-select>
<a-button @click="clear">清空</a-button>

JSON

emotionList = [
{
name: "全部",
value: -1
},
{
name: "负面",
value: 0
},
{
name: "中性",
value: 1
},
{
name: "正面",
value: 2
}
];

What is expected?

期望能够 点击清空按钮的时候将select改变过的值恢复成默认值，这里的默认值是“全部”

What is actually happening?

清空按钮的方法不知道怎么写

[sendya]

<a-select  v-model="emotionList[0].name" class="filter-item_select" @change="handleEmotionChange">
<a-select-option  :value="item.value"  v-for="item in emotionList" :key="item.id" >{{item.name}}</a-select-option>
</a-select>
<a-button @click="clear">清空</a-button>

emotionList[0].name = undefined

[sendya]

具体可以参考这个：

[github-actions]

This issue is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 7 days

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.