vue element-ui 表格嵌套表格的数据处理

<el-table :data="" v-loading="listLoading" element-loading-text="给我一点时间" height="500" element-loading-background="rgba(0, 0, 0, .3)" style="width: 100%"> <el-table-column type="expand" prop="names"> <template slot-scope="scope" > <el-table :data="" > <el-table-column prop="name" label="名称" sortable align="center"> <template slot-scope="scope"> <span>{{scope.row.name}}</span> </template> </el-table-column> <el-table-column prop="num" label="数量" sortable align="center"> <template slot-scope="scope"> <span>{{scope.row.num}}</span> </template> </el-table-column> </el-table> </template> </el-table-column> <el-table-column prop="Id" label="编号" sortable align="center" > <template slot-scope="scope"> <span>{{scope.row.Id}}</span> </template> </el-table-column> <el-table-column fixed="right" align="center" width="100" label="操作"> <template slot-scope="scope"> <el-dropdown trigger="click" @command="handleCommand"> <el-button class="btn-drop-down" @click="selectRow()"> <i class="el-icon-arrow-down"></i> </el-button> <el-dropdown-menu slot="dropdown"> <el-dropdown-item command="edit">编辑</el-dropdown-item> <el-dropdown-item command="del">删除</el-dropdown-item> </el-dropdown-menu> </el-dropdown> </template> </el-table-column> </el-table>