Element ui怎么实现树形数据有表头

如图，用饿了么组件怎样实现下面的效果，不知道怎么去实现，有用:tree-props="{children: 'childlist', hasChildren: 'hasChildren'}"，但是没有表头

建议看一个视频，黑马商城

不能使用 :tree-props="{children: 'childlist', hasChildren: 'hasChildren'}"，对饿了么ui不太熟悉，这个问题卡了我一天，我的解决办法是在el-table里边加一个 @expand-change="加载函数" 然后添加一个el-table-column作为展开的选项

<el-table-column type="expand"
          align="center">
          <template slot-scope="props">
            <el-table :data="props.row.member">
              <el-table-column prop="one"
                label="属性1">
              </el-table-column>
              <el-table-column prop="two"
                label="属性2">
              </el-table-column>
              <el-table-column prop="three"
                label="属性3">
              </el-table-column>
         </el-table>
         </template>
    </el-table-column>
 

有人知道吗

<el-table
    :data="tableData"
    style="width: 100%;margin-bottom: 20px;"
    row-key="id"
    border
    default-expand-all
    :tree-props="{children: 'children', hasChildren: 'hasChildren'}">
    <el-table-column
      prop="date"
      label="日期"
      sortable
      width="180">
    </el-table-column>
    <el-table-column
      prop="name"
      label="姓名"
      sortable
      width="180">
    </el-table-column>
    <el-table-column
      prop="address"
      label="地址">
    </el-table-column>
  </el-table>

let tableData = [{
          id: 1,
          date: '2016-05-02',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1518 弄'
        }, {
          id: 2,
          date: '2016-05-04',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1517 弄'
        }, {
          id: 3,
          date: '2016-05-01',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1519 弄',
          children: [{
              id: 31,
              date: '2016-05-01',
              name: '王小虎',
              address: '上海市普陀区金沙江路 1519 弄'
            }, {
              id: 32,
              date: '2016-05-01',
              name: '王小虎',
              address: '上海市普陀区金沙江路 1519 弄'
          }]
        }, {
          id: 4,
          date: '2016-05-03',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1516 弄'
        }],
        tableData1: [{
          id: 1,
          date: '2016-05-02',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1518 弄'
        }, {
          id: 2,
          date: '2016-05-04',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1517 弄'
        }, {
          id: 3,
          date: '2016-05-01',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1519 弄',
          hasChildren: true
        }, {
          id: 4,
          date: '2016-05-03',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1516 弄'
        }]

如果数据是一维列表不是树形嵌套，需要先递归一下，生成父子级嵌套关系的数据。
递归方法参考：

/**
 * 构造树型结构数据
 * @param {*} data 数据源
 * @param {*} id id字段 默认 'id'
 * @param {*} parentId 父节点字段 默认 'parentId'
 * @param {*} children 孩子节点字段 默认 'children'
 */
function handleTree(data, id, parentId, children) {
  let config = {
    id: id || 'id',
    parentId: parentId || 'parentId',
    childrenList: children || 'children'
  };

  var childrenListMap = {};
  var nodeIds = {};
  var tree = [];

  for (let d of data) {
    let parentId = d[config.parentId];
    if (childrenListMap[parentId] == null) {
      childrenListMap[parentId] = [];
    }
    nodeIds[d[config.id]] = d;
    childrenListMap[parentId].push(d);
  }

  for (let d of data) {
    let parentId = d[config.parentId];
    if (nodeIds[parentId] == null) {
      tree.push(d);
    }
  }

  for (let t of tree) {
    adaptToChildrenList(t);
  }

  function adaptToChildrenList(o) {
    if (childrenListMap[o[config.id]] !== null) {
      o[config.childrenList] = childrenListMap[o[config.id]];
    }
    if (o[config.childrenList]) {
      for (let c of o[config.childrenList]) {
        adaptToChildrenList(c);
      }
    }
  }
  return tree;
}