动态增删表格

期望目标：实现一个能通过按钮来动态增加表格栏，每次能添加一行，每行末尾有一个删减按钮。

<el-button type="text" class="primary"
         @click="addMember()">+添加</el-button>
<el-table
        :data="memberList"
        style="width: 100%"
        :header-cell-style="{
          background: '#fafafa',
          color: '#aaa',
          fontSize: '15px',
      }"
      >
        <el-table-column prop="index" label="序号" width="60">
          <template slot-scope="scope">
            <span>{{ getMemberIndex(scope.$index) }}</span>
          </template>
        </el-table-column>
        <el-table-column prop="facilityName" label="设施名称">
          <template slot-scope="scope">
            <el-select v-model="scope.row.facilityName" placeholder="请选择名称" clearable>
              <el-option v-for="dict in dict.type.data_facilities_name" :label="dict.label" :value="dict.value"  />
            </el-select>
          </template>
        </el-table-column>
        <el-table-column prop="facilitySpecificType" label="具体类型">
          <template slot-scope="scope">
            <el-select v-model="scope.row.facilitySpecificType" placeholder="请选择类型" clearable>
              <el-option v-for="dict in dict.type.data_facilities_type" :label="dict.label" :value="dict.value"/>
            </el-select>
          </template>
        </el-table-column>
        <el-table-column prop="facilityLocation" label="设施位置">
          <template slot-scope="scope">
            <el-select v-model="scope.row.facilityLocation" placeholder="请选择位置" clearable>
              <el-option v-for="dict in dict.type.data_equipment_location" :label="dict.label" :value="dict.value"/>
            </el-select>
          </template>
        </el-table-column>
        <el-table-column prop="facilityTp" label="规格">
          <template slot-scope="scope">
            <el-input v-model="scope.row.facilityTp"></el-input>
          </template>
        </el-table-column>
        <el-table-column prop="accountabilityUnit" label="责任单位">
          <template slot-scope="scope">
            <el-input v-model="scope.row.accountabilityUnit"></el-input>
          </template>
        </el-table-column>
        <el-table-column label="操作">
          <template slot-scope="scope">
            <el-button
              size="mini"
              type="text"
              icon="el-icon-delete"
              @click="handleDelete(scope.$index,'memberList')"
            >删除
            </el-button>
          </template>
        </el-table-column>
      </el-table>

// 添加杆件数据按钮
    addMember() {
      var member = {
        index: this.dataId++,
        facilityNo: '',
        facilityName: '',
        facilitySpecificType: '',
        facilityLocation: '',
        facilityTp: '',
        accountabilityUnit: '',
      };
      this.memberList.push(member);
    },

效果：

遇到的问题一：在删减时，当前所有行的序号需要自动删减，重新计算变更序号

// 删除行数据后序号自动连贯更新
    getMemberIndex(index) {
      return this.memberList.slice(0, index + 1).length ;
    },
/** 删除按钮操作 */
    handleDelete(index, listName) {
      if (index !== -1 && listName =="memberList") {
        this.memberList.splice(index, 1)
      }
    },

给序号那一栏字段单独重设，动态变更index，<span>{{ getMemberIndex(scope.$index) }}</span>，每次删除一行，调用handleDelete函数，再用getMember重新计算一遍所有序号

如果有数据验证的需求，就需要在table外面再嵌套一层form，因为只有el-form表单猜有数据验证的功能。

<el-form :model="memberForm" :rules="rules" ref="memberForm"></el-form>

问题二：

多个表单同时用一个接口提交，在提交数据表单时，后端要求有特殊的数据结构，需要将获取到的多个表单数据重新按要求整合。新设立一个json字段存储

/** 提交按钮 */
    async submitForms() {
      // 构建数据结构
      const facilitiesData = {
        pointId: this.pointForm.pointId,
        pointName: this.pointForm.pointName,
        memberList: this.memberList.map(member => ({
          facilityName: member.facilityName,
          facilitySpecificType: member.facilitySpecificType,
          facilityLocation: member.facilityLocation,
          facilityTp: member.facilityTp,
          accountabilityUnit: member.accountabilityUnit,
        })),
      }
      // 发送请求添加设施
      await addFacilities(facilitiesData).then(response => {
        this.$modal.msgSuccess("新增成功");
        this.goBack();
      })
    },