问题描述：
- 内嵌表格数据混乱，点击展开一行，结果展开了所有行
原因：:row-key="getRowKeys" 绑定错了数据，此处应该绑定父级table的主键，而不是子级别table的主键 - 调用 getList 接口重新查询父级表格数据后，子级表格数据丢失
原因：页面数据重新加载了，但是子级表格数据没有再次加载，所以数据丢失了
核心代码：
<el-table
:data="tableData.list"
@selection-change="selectChange"
ref="_table"
border
highlight-current-row
header-cell-class-name="tableHeader"
size="mini"
:row-key="getRowKeys"
@row-click="handleRowClick"
:expand-row-keys="expands"
@expand-change="expandChange"
>
<el-table-column type="selection"></el-table-column>
<el-table-column prop="wealthId" label="合并编号" width="90"> </el-table-column>
<el-table-column type="expand" label="展开">
<template slot-scope="props">
<el-table
:data="props.row.detailList"
border
header-cell-class-name="tableHeader"
size="mini"
>
<el-table-column prop="businessDate" label="日期" width="100" :formatter="formatTime">
</el-table-column>
<el-table-column prop="contractNo" label="本金编号" width="100"> </el-table-column>
<el-table-column prop="businessTypeName" label="业务类型" width="120">
</el-table-column>
<el-table-column
prop="principalBalanceMoney"
label="本金"
:formatter="formatterAmount"
width="150"
>
</el-table-column>
<el-table-column prop="expectedReturnRate" label="预期收益率" width="90">
</el-table-column>
<el-table-column prop="interestChangeMoney" label="利息变动" width="120">
</el-table-column>
<el-table-column prop="changeType" label="计息截止日" width="100"> </el-table-column>
</el-table>
</template>
</el-table-column>
</el-table>
- row-click: 点击当前行触发此函数，可省略。expand-row-keys: 可以通过该属性设置 Table 目前的展开行，需要设置 row-key 属性才能使用，该属性为展开行的 keys 数组。
export default {
data() {
return {
expands: [], //要展开的行，数值的元素是row的key值
openDetailList: [],
}
},
methods: {
// 获取父级table，行数据的key值
getRowKeys(row) {
return row.wealthId
},
handleRowClick(row) {
console.log('点击行: ', row)
this.$refs._table.toggleRowSelection(row)
this.$refs._table.toggleRowExpansion(row)
this.expands.includes(row.wealthDetailId)
? (this.expands = this.expands.filter(v => v !== row.wealthDetailId))
: this.expands.push(row.wealthDetailId)
},
async expandChange(row, expandedRows) {
if (expandedRows.length > 0) {
if (!this.openDetailList.includes(row.wealthId)) {
this.getWealthDetail(row.wealthId)
}
}
},
async getWealthDetail(wealthId) {
let { data } = await findWealthDetail({
wealthId: wealthId,
})
if (data.ret === 1) {
this.openDetailList.push(wealthId)
console.log('所有展开行：', this.openDetailList)
let curDetailObj = data.data
if (curDetailObj.length) {
curDetailObj = data.data.map((item, index) => {
let key = 'hiddenDel'
let val = index === curDetailObj.length - 1 ? false : true
item[key] = val
return item
})
}
// 比较是点击的父级table内部具体哪一个行数据的明细数据！
for (let i = 0, len = this.tableData.list.length; i < len; i++) {
if (wealthId === this.tableData.list[i].wealthId) {
this.$set(this.tableData.list[i], 'detailList', curDetailObj)
break
}
}
} else {
this.$message.error(data.msg)
}
},
// 解决问题2
resetDetailList() {
this.getList()
if (!this.openDetailList.length) return
let exitExpandsList = [...new Set(this.openDetailList)]
exitExpandsList.forEach(v => this.getWealthDetail(v))
},
}
}
- expand-change: 当用户对某一行展开或者关闭的时候会触发该事件（展开行时，回调的第二个参数为 expandedRows；树形表格时第二参数为 expanded）
