vue+element-ui实现主子表

需要实现如下效果

一般ERP中，订单数据都分为汇总信息与明细信息，然后在查询的时候一次性从后台查询多条订单json数据，并将汇总信息展示到表格中。但是明细信息也是用户需要关注的，比如用户可能会想知道某个订单里面具体包含哪些商品，下单数量分别是多少。这时候就需要能够点击具体汇总信息行数据的时候，在下方展示出对应的明细数据。

实现要点

1、主表格绑定 @expand-change 事件

<el-table v-loading="loading" :data="data" size="small" border style=" 100%;" @expand-change="rowExpand">

2、增加展开列，并在展开列中再加一个table（作为子表）

      <el-table-column type="expand" prop="">
        <template slot-scope="">
          <el-table :data="orderDetailData">
            <el-table-column label="订单编号" prop="orderId"/>
            <el-table-column label="商品名称" prop="skuName"/>
            <el-table-column label="购买数量" prop="purchaseNum"/>
            <el-table-column label="价格" prop="skuPrice"/>
            <el-table-column label="商品编码" prop="venderSku"/>
            <el-table-column label="单品优惠" prop="discount"/>
          </el-table>
        </template>
      </el-table-column>

3、methods中增加rowExpand方法具体实现

    rowExpand(row, expandeRows) {
      console.log('点开了' + row.orderId)
      console.log(row.orderDetails)
      const _this = this
      _this.orderDetailData = row.orderDetails
    }

完整代码如下

<template>
  <div class="app-container">
    <eHeader :query="query"/>
    <!--表格渲染-->
    <el-table v-loading="loading" :data="data" size="small" border style=" 100%;" @expand-change="rowExpand">
      <el-table-column type="expand" prop="">
        <template slot-scope="">
          <el-table :data="orderDetailData">
            <el-table-column label="订单编号" prop="orderId"/>
            <el-table-column label="商品名称" prop="skuName"/>
            <el-table-column label="购买数量" prop="purchaseNum"/>
            <el-table-column label="价格" prop="skuPrice"/>
            <el-table-column label="商品编码" prop="venderSku"/>
            <el-table-column label="单品优惠" prop="discount"/>
          </el-table>
        </template>
      </el-table-column>
      <el-table-column prop="orderId" label="订单编号" align="left" width="120"/>
      <el-table-column prop="venderId" label="商家ID" />
      <el-table-column prop="orderTime" label="订单时间" min-width="140"/>
      <el-table-column prop="venderCode" label="客户编码" width="100"/>
      <el-table-column prop="payType" label="付款方式"/>
      <el-table-column prop="totalMoney" label="总金额"/>
      <el-table-column prop="discount" label="优惠金额"/>
      <el-table-column prop="payMoney" label="支付金额"/>
      <el-table-column prop="companyName" label="买家公司名称" width="120"/>
      <el-table-column prop="pickName" label="收货人"/>
      <el-table-column prop="pickAddress" label="收货地址" width="200"/>
      <el-table-column prop="pickPhone" label="收货人电话" width="100"/>
      <el-table-column prop="orderState" label="订单状态"/>
      <el-table-column prop="orderState" label="平台优惠"/>
      <el-table-column prop="remark" label="备注"/>
      <el-table-column prop="freight" label="运费" width="60"/>
      <el-table-column label="操作" width="150px" align="center">
        <template slot-scope="scope">
          <!-- <el-button slot="reference" type="primary" size="mini" @click="showDetail">订单详情</el-button> -->
          <edit v-if="checkPermission(['ADMIN'])" :data="scope.row" :sup_this="sup_this"/>
          <el-popover
            v-if="checkPermission(['ADMIN'])"
            :ref="scope.row.orderId"
            placement="top"
            width="180">
            <p>确定删除本条数据吗？</p>
            <div style="text-align: right; margin: 0">
              <el-button size="mini" type="text" @click="$refs[scope.row.orderId].doClose()">取消</el-button>
              <el-button :loading="delLoading" type="primary" size="mini" @click="subDelete(scope.row.orderId)">确定</el-button>
            </div>
            <el-button slot="reference" type="danger" size="mini">删除</el-button>
          </el-popover>
        </template>
      </el-table-column>
    </el-table>
    <!--分页组件-->
    <el-pagination
      :total="total"
      style="margin-top: 8px;"
      layout="total, prev, pager, next, sizes"
      @size-change="sizeChange"
      @current-change="pageChange"/>
  </div>
</template>

<script>
import checkPermission from '@/utils/permission'
import initData from '@/mixins/initData'
import { parseTime } from '@/utils/index'
import eHeader from './module/header'
import { del } from '@/api/ordersMan'
import edit from './module/edit'
export default {
  components: { eHeader, edit },
  mixins: [initData],
  data() {
    return {
      // delLoading: false, sup_this: this, orderDetailData: [{ orderId: '11111', skuName: 'ddddddd' }, { orderId: '22222', skuName: 'ffffffff' }]
      delLoading: false, sup_this: this, orderDetailData: null
    }
  },
  created() {
    this.$nextTick(() => {
      this.init()
    })
  },
  methods: {
    parseTime,
    checkPermission,
    beforeInit() {
      this.url = 'api/orders'
      const sort = 'orderId,desc'
      this.params = { page: this.page, size: this.size, sort: sort }
      const query = this.query
      const type = query.type
      const value = query.value
      if (type && value) { this.params[type] = value }
      return true
    },
    subDelete(orderId) {
      this.delLoading = true
      del(orderId).then(res => {
        this.delLoading = false
        this.$refs[orderId].doClose()
        this.init()
        this.$notify({
          title: '删除成功',
          type: 'success',
          duration: 2500
        })
      }).catch(err => {
        this.delLoading = false
        this.$refs[orderId].doClose()
        console.log(err.response.data.message)
      })
    },
    rowExpand(row, expandeRows) {
      console.log('点开了' + row.orderId)
      console.log(row.orderDetails)
      const _this = this
      _this.orderDetailData = row.orderDetails
    }
  }
}
</script>

<style scoped>
  .demo-table-expand {
    font-size: 0;
  }
  .demo-table-expand label {
     90px;
    color: #99a9bf;
  }
  .demo-table-expand .el-form-item {
    margin-right: 0;
    margin-bottom: 0;
     50%;
  }

</style>

坑

其实不能算做坑，只是自己对于VUE不熟悉自己坑了自己

  data() {
    return {
      // delLoading: false, sup_this: this, orderDetailData: [{ orderId: '11111', skuName: 'ddddddd' }, { orderId: '22222', skuName: 'ffffffff' }]
      delLoading: false, sup_this: this, orderDetailData: null
    }
  },

data中需要给orderDetailData给个null值，那么后面的rowExpand方法中再给_this.orderDetailData 赋值界面上的数据才会重新渲染。这个问题在官方文档中有说明：