el-table合并单元格，删除功能怎么实现？

Question

<template>
  <div>
    <el-table
      :data="tableData"
      :span-method="objectSpanMethod"
      border
      style="width: 100%; margin-top: 20px"
    >
      <el-table-column prop="id" label="ID" width="180" />
      <el-table-column prop="name" label="Name" />
      <el-table-column prop="amount1" label="Amount 1" />
      <el-table-column prop="amount2" label="Amount 2" />
      <el-table-column prop="amount3" label="Amount 3" />
    </el-table>
  </div>
</template>

<script lang="ts" setup>
import type { TableColumnCtx } from 'element-plus'

interface User {
  id: string
  name: string
  amount1: string
  amount2: string
  amount3: number
}

interface SpanMethodProps {
  row: User
  column: TableColumnCtx<User>
  rowIndex: number
  columnIndex: number
}
const objectSpanMethod = ({
  row,
  column,
  rowIndex,
  columnIndex,
}: SpanMethodProps) => {
  if (columnIndex === 0) {
    if (rowIndex % 2 === 0) {
      return {
        rowspan: 2,
        colspan: 1,
      }
    } else {
      return {
        rowspan: 0,
        colspan: 0,
      }
    }
  }
}

const tableData: User[] = [
  {
    id: '12987122',
    name: 'Tom',
    amount1: '234',
    amount2: '3.2',
    amount3: 10,
  },
  {
    id: '12987123',
    name: 'Tom',
    amount1: '165',
    amount2: '4.43',
    amount3: 12,
  },
  {
    id: '12987124',
    name: 'Tom',
    amount1: '324',
    amount2: '1.9',
    amount3: 9,
  },
  {
    id: '12987125',
    name: 'Tom',
    amount1: '621',
    amount2: '2.2',
    amount3: 17,
  },
  {
    id: '12987126',
    name: 'Tom',
    amount1: '539',
    amount2: '4.1',
    amount3: 15,
  },
]
</script>

需求：因有新增按钮，所以需做删除功能，这里两行为一组，一组一个删除按钮，新增也是按组来新增。
问题：假如id换成可输入人名，并可以这个人名作为id删除，输入之后数组里只有第一个对象id才有值，第二就没有，如何解决。
输入后的数据结构就会变成这样：

const tableData: User[] = [
  {
    id: '123',
    name: 'Tom',
    amount1: '234',
    amount2: '3.2',
    amount3: 10,
  },
  {
    id: '',
    name: 'Tom',
    amount1: '165',
    amount2: '4.43',
    amount3: 12,
  },
  {
    id: '456',
    name: 'Tom',
    amount1: '324',
    amount2: '1.9',
    amount3: 9,
  },
  {
    id: '',
    name: 'Tom',
    amount1: '621',
    amount2: '2.2',
    amount3: 17,
  },
  {
    id: '789',
    name: 'Tom',
    amount1: '539',
    amount2: '4.1',
    amount3: 15,
  },
{
    id: '',
    name: 'Tom',
    amount1: '539',
    amount2: '4.1',
    amount3: 15,
  },
]

Answer 1

你可以参考一下

<template>
  <div>
    <el-table
      :data="tableData"
      :span-method="objectSpanMethod"
      border
      style="width: 100%; margin-top: 20px"
    >
      <el-table-column prop="id" label="ID" width="180" />
      <el-table-column prop="name" label="Name" />
      <el-table-column prop="amount1" label="Amount 1" />
      <el-table-column prop="amount2" label="Amount 2" />
      <el-table-column prop="amount3" label="Amount 3" />
      <el-table-column label="操作">
        <template #default="{rowIndex}">
          <el-button
            v-if="rowIndex % 2 === 0"
            size="mini"
            type="danger"
            @click="deleteGroup(rowIndex)"
            >删除</el-button
          >
        </template>
      </el-table-column>
    </el-table>
    <el-button type="primary" @click="addGroup">添加组</el-button>
  </div>
</template>

<script> 部分

const addGroup = () => {
  const newGroup = [
    {
      id: "",
      name: "",
      amount1: "",
      amount2: "",
      amount3: 0,
    },
    {
      id: "",
      name: "",
      amount1: "",
      amount2: "",
      amount3: 0,
    },
  ];
  tableData.push(...newGroup);
};

const deleteGroup = (rowIndex) => {
  tableData.splice(rowIndex, 2);
};