关于 el-table-column 加上key仍然不按顺序显示的问题

这个问题，在查百度前，我花了近1个小时，后来百度后，几分钟解决。原因是，不管v-if v-for等指令，请不要用<div> 或<li>标签封装，说多了都是泪。

附上正确的模板，什么KEY可以确定排序的，KEY在这个环境中根本起不了作用

 <template v-for="index in monthDay">
            <el-table-column align="center" type="index" :label="index+''">
              <el-table-column v-if="weekJiList[index-1]==1" align="center" width="40" :label="$t('attendance.Monday')">
                <template slot-scope="scope">
                </template>
              </el-table-column>
              <el-table-column v-if="weekJiList[index-1]==2" align="center" width="40" :label="$t('attendance.Tuesday')">
                <template slot-scope="scope">
                </template>
              </el-table-column>
              <el-table-column v-if="weekJiList[index-1]==3" align="center" width="40" :label="$t('attendance.Wednesday')">
                <template slot-scope="scope">
                </template>
              </el-table-column>
              <el-table-column v-if="weekJiList[index-1]==4" align="center" width="40" :label="$t('attendance.thursday')">
                <template slot-scope="scope">
                </template>
              </el-table-column>
              <el-table-column v-if="weekJiList[index-1]==5" align="center" width="40" :label="$t('attendance.Friday')">
                <template slot-scope="scope">
                </template>
              </el-table-column>
              <el-table-column v-if="weekJiList[index-1]==6" align="center" width="40" :label="$t('attendance.Saturday')">
                <template slot-scope="scope">
                </template>
              </el-table-column>
              <el-table-column v-if="weekJiList[index-1]==7" align="center" width="40" :label="$t('attendance.Sunday')">
                <template slot-scope="scope">
                </template>
              </el-table-column>
            </el-table-column>
          </template>

          <!-- 应出勤天数 -->
          <el-table-column align="center" width="40" :label="$t('attendance.attendanceNumber')">
            <template slot-scope="scope">
              <span>{
   
   { scope.row.totalAttendance }}</span>
            </template>
          </el-table-column>