element table下input v-model绑定数据并动态新增

<el-button type="primary" icon="el-icon-plus" @click="addRule">新增</el-button>
<el-form :rules="formData.rules" :model="formData" ref="formDom" class="demo-ruleForm">
              <el-table :data="formData.deviceThresholdList">
                <!-- v-loading="loading" -->
                <el-table-column label="序号" align="center" prop="index">
                  <template slot-scope="scope">
                    <span>{{scope.$index+1}}</span>
                  </template>
                </el-table-column>
                <el-table-column label="阈值" align="center" prop="thresholdStatus">
                  <template slot-scope="scope">
                    <el-form-item :prop="'deviceThresholdList.' + scope.$index + '.thresholdStatus'" :rules='formData.rules.thresholdStatus'>
                      <el-select v-model="scope.row.thresholdStatus">
                        <el-option v-for="item in thresholdOptions" :key="item.dictValue" :label="item.dictLabel"
                          :value="item.dictValue"></el-option>
                      </el-select>
                    </el-form-item>

                  </template>
                </el-table-column>
                <el-table-column label="Value" align="center" prop="vals">
                  <template slot-scope="scope">
                    <el-form-item :prop="'deviceThresholdList.' + scope.$index + '.thresholdStatus'" :rules='formData.rules.vals'>
                      <el-input v-model="scope.row.vals" placeholder="请输入阈值" size="medium"></el-input>
                    </el-form-item>
                  </template>
                </el-table-column>
                <el-table-column label="颜色" align="center" prop="thresholdColor" width="180">
                  <template slot-scope="scope">
                    <el-form-item :prop="'deviceThresholdList.' + scope.$index + '.thresholdColor'" :rules='formData.rules.thresholdColor'>
                      <el-select v-model="scope.row.thresholdColor">
                        <el-option v-for="item in thresholdColorList" :key="item.value" :label="item.label" :value="item.value"></el-option>
                      </el-select>
                    </el-form-item>
                  </template>
                </el-table-column>
                <el-table-column label="报警内容" align="center" prop="describe" width="180">
                  <template slot-scope="scope">
                    <el-form-item :prop="'deviceThresholdList.' + scope.$index + '.describe'" :rules='formData.rules.describe'>
                      <el-input type="textarea" v-model="scope.row.describe" :autosize="{minRows: 1,maxRows: 3}"
                        placeholder="请输入报警内容" size="medium"></el-input>
                    </el-form-item>

                  </template>
                </el-table-column>
                <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
                  <template slot-scope="scope">
                    <el-tooltip class="item fs-20" effect="dark" content="删除" placement="top-start">
                      <el-button size="mini" type="text" icon="el-icon-delete" @click="handleDelete(scope.$index,scope.row)"></el-button>
                      <!-- v-hasPermi="['system:house:remove']" -->
                    </el-tooltip>
                  </template>
                </el-table-column>
              </el-table>
            </el-form>


 export default {
    data() {
      return {
       thresholdOptions: [{
       dictLable:'测试',dictValue:'1'}], //阈值字典设置
      thresholdColorList: [{
            label: '碧绿色',
            value: '#7FFFAA'
          },
          {
            label: '海洋绿',
            value: '#2E8B57'
          },
          {
            label: '卡其布',
            value: '#F0E68C'
          },
          {
            label: '秋麒麟',
            value: '#DAA520'
          },
          {
            label: '橙红色',
            value: '#FF4500'
          },
          {
            label: '纯红',
            value: '#FF0000'
          },
          {
            label: '深灰色',
            value: '#A9A9A9'
          },
          {
            label: '深天蓝',
            value: ' 	#00BFFF'
          }
        ],
		formData: {
		          rules: {
		            thresholdStatus: {
		              required: true,
		              message: "必选字段",
		              trigger: "change"
		            },
		            describe: {
		              required: true,
		              message: "必填字段",
		              trigger: "blur"
		            },
		            vals: {
		              required: true,
		              message: "必填字段",
		              trigger: "blur"
		            },
		            thresholdColor: {
		              required: true,
		              message: "必须字段",
		              trigger: "change"
		            }
		          },
		          //阈值table
		          deviceThresholdList: [{
		            thresholdStatus: '1', //阈值
		            describe: '', //报警内容
		            thresholdColor: '', //颜色
		            vals: '' //值
		          }]
		        }
		      }
		 }
	}，
	methods: {
     
      /**规则新增*/
      addRule() {
        var newValue = {
          thresholdStatus: '0', //阈值
          describe: '', //报警内容
          thresholdColor: '', //颜色
          vals: '' //值
        }
        //添加新的行数
        this.formData.deviceThresholdList.push(newValue);
      },
      /**规则删除*/
      handleDelete(index) {
        this.formData.tableData.splice(index, 1)
      },
      }
}