el treeTable每个格都插入下拉框，请问怎么做

Question

需求是这样的，treeTable，每个格都插入下拉框，普通的知道，但是换成tree就不知道怎么做了，请问有什么解决办法吗，找了很久的插件找到一个vxe-table可以做但是项目vue版本太低不能用。

代码

<el-table :data="formatData" :row-style="showRow" v-bind="$attrs">
      <el-table-column v-if="columns.length===0" width="150">
        <template slot-scope="scope">
          <span v-for="space in scope.row._level" :key="space" class="ms-tree-space"/>
          <span v-if="iconShow(0,scope.row)" class="tree-ctrl" @click="toggleExpanded(scope.$index)">
            <i v-if="!scope.row._expanded" class="el-icon-plus"/>
            <i v-else class="el-icon-minus"/>
          </span>
          {{ scope.$index }}
        </template>
      </el-table-column>
      <el-table-column v-for="(column, index) in columns" v-else :key="column.value" :label="column.text" :width="column.width">
        <template slot-scope="scope">
          <span v-for="space in scope.row._level" v-if="index === 0" :key="space" class="ms-tree-space"/>
          <span v-if="iconShow(index,scope.row)" class="tree-ctrl" @click="toggleExpanded(scope.$index)">
            <i v-if="!scope.row._expanded" class="el-icon-plus"/>
            <i v-else class="el-icon-minus"/>
          </span>
          {{ scope.row[column.value] }}
        </template>
      </el-table-column>
    </el-table>

Answer 1

利用 el-table-column 提供的插槽来实现自定义表格内容, 把需要添加列改成下面即可

<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="type" label="设备类型" width="180">
    </el-table-column>
    <el-table-column prop="week" label="周" width="180">
        <template slot-scoped="scoped">
            <el-select>
                <el-option>1234</el-option>
            </el-select>
        </template>
    </el-table-column>
    <el-table-column prop="day" label="日">
        <template slot-scoped="scoped">
            <el-select>
                <el-option>1234</el-option>
            </el-select>
        </template>
    </el-table-column>
</el-table>

   export default {
        data() {
          return {
            tableData: [{
              id: 1,
              type: '设备类型1',
              week: '',
              day: '',
              children: [{
                   id: 11,
                   type: '设备11',
                   week: '',
                   day: ''
                }, {
                   id: 12,
                   type: '设备12',
                   week: '',
                   day: ''
                }]
            },  {
              id: 2,
              type: '设备类型2',
              week: '',
              day: '',
              children: [{
                   id: 21,
                   type: '设备021',
                   week: '',
                   day: ''
                }, {
                   id: 22,
                   type: '设备022',
                   week: '',
                   day: ''
                }]
            }]
          }
        }     
    }
    

呈现效果