elementPlus + table 树形懒加载，子节点的刷新

文章目录

• • 需求描述
  • 技术细节
  • 小结

需求描述

一个树形表格的增删查改

技术细节

刚开始想的很好，新增/编辑/删除时不调用接口，而是直接更改数据，如删除时，直接删除对应下标的数据
遇到的问题

1. 实际业务中是否有子级，是不确定的-这个好解决，判断一下就行
2. 通过load接口获取到的子项，使用proxy.$refs.table.store.states.lazyTreeNodeMap.value获取不到节点
3. 通过proxy.$refs.table.store.states.treeData.value可以获取到节点数据，但是不能触发更新
4. 最后使用了最简单的方式，新增，删除，编辑完成后，直接使用proxy.$refs.table.store.loadOrToggle(row)重新触发load调接口

<template>
  <div>

    <el-table :data="tableData1" style="width: 100%" row-key="id" border lazy :load="load"
      :tree-props="{ children: 'children', hasChildren: 'hasChildren' }" ref="table">
      <el-table-column prop="date" label="Date" />
      <el-table-column prop="name" label="Name" />
      <el-table-column prop="address" label="Address" />
      <el-table-column prop="address" label="Address" width="270">
        <template #default="scope">
           <el-button type="primary" size="small" @click="handleAdd(scope.row)">
            add
          </el-button>
           <el-button type="primary" size="small" @click="handleAdd2(scope.row)">
            add2
          </el-button>
          <el-button size="small" @click="handleEdit(scope.row)">
            Edit
          </el-button>
          <el-button size="small" type="danger" @click="handleDelete(scope.row)">
            Delete
          </el-button>
        </template>
      </el-table-column>
    </el-table>
  </div>
</template>
<script setup>
import {onMounted,ref,getCurrentInstance} from 'vue';
const {proxy} = getCurrentInstance();

const handleEdit = ((row) => {
  console.log(row)
})
const handleDelete = ((row) => {
  console.log(row)
})
const handleAdd = ((row) => {
console.log(proxy.$refs.table.store.states.treeData.value)
console.log(proxy.$refs.table.store.states.lazyTreeNodeMap.value)
 // proxy.$refs.table.store.states.treeData.value[row.id].loaded = false;
  proxy.$refs.table.store.states.treeData.value[row.id].loaded = false
  proxy.$refs.table.store.loadOrToggle(row)
})
const handleAdd2 = ((row) => {
  
})
const load = (
  row,
  treeNode,
  resolve
) => {
  console.log(row)
  setTimeout(() => {
    resolve([
      {
        id: `${row.id}_31`,
        date: '2016-05-01',
        name: 'wangxiaohu',
        address: 'No. 189, Grove St, Los Angeles',
        hasChildren: true,
      },
      {
        id: `${row.id}_32`,
        date: '2016-05-01',
        name: 'wangxiaohu',
        address: 'No. 189, Grove St, Los Angeles',
        hasChildren: true,
      },
    ])
  }, 1000)
}


const tableData1 = [
  {
    id: 11,
    date: '2016-05-02',
    name: 'wangxiaohu',
    address: 'No. 189, Grove St, Los Angeles',
    hasChildren: true,
  },
  {
    id: 2,
    date: '2016-05-04',
    name: 'wangxiaohu',
    hasChildren: true,
    address: 'No. 189, Grove St, Los Angeles',
  },
  {
    id: 3,
    date: '2016-05-01',
    name: 'wangxiaohu',
    hasChildren: true,
    address: 'No. 189, Grove St, Los Angeles',
  },
  {
    id: 4,
    date: '2016-05-03',
    name: 'wangxiaohu',
    hasChildren: true,
    address: 'No. 189, Grove St, Los Angeles',
  },
]
</script>

小结

关键点在于：proxy.$refs.table.store.loadOrToggle(row)