elementui中table进行表单验证

<el-form :model="ruleForm" ref="ruleForm" class="demo-ruleForm">
  <el-table :data="ruleForm.tableDataShou" border style="width: 100%;">
    <el-table-column type="index" label="序号" width="50" align="center"></el-table-column>
      <el-table-column prop="lon" label="经度" align="center">
        <template v-slot="scope">
           <el-form-item :prop="'tableDataShou.'+scope.$index+'.lon'" :rules="rules.lon">
              <el-input v-model="scope.row.lon"></el-input>
           </el-form-item>
        </template>
      </el-table-column>
      <el-table-column prop="lat" label="纬度" align="center">
         <template v-slot="scope">
            <el-form-item :prop="'tableDataShou.'+scope.$index+'.lat'" :rules="rules.lat">
              <el-input v-model="scope.row.lat"></el-input>
            </el-form-item>
          </template>
       </el-table-column>
  </el-table>
</el-form>
<el-button type="primary" @click="finish('ruleForm')">输入完成</el-button>
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data() {
    var longitude = (rule, value, callback) => {
      let isTrue =
        /^(\-|\+)?(((\d|[1-9]\d|1[0-7]\d|0{1,3})\.\d{0,6})|(\d|[1-9]\d|1[0-7]\d|0{1,3})|180\.0{0,6}|180)$/;
      if (!isTrue.test(value)) {
        callback(new Error("请按照经度规则输入"));
      } else if (value.slice(-1) == ".") {
        callback(new Error("最后一位不能是小数点"));
      } else {
        callback();
      }
    };
    var latitude = (rule, value, callback) => {
      let isTrue = /^(\-|\+)?([0-8]?\d{1}\.\d{0,6}|90\.0{0,6}|[0-8]?\d{1}|90)$/;
      if (!isTrue.test(value)) {
        callback(new Error("请按照纬度规则输入"));
      } else if (value.slice(-1) == ".") {
        callback(new Error("最后一位不能是小数点"));
      } else {
        callback();
      }
    };
   return {
      ruleForm: {
        tableDataShou: [{ lon: "", lat: "" }],
      },
      rules: {
        lon: [{ require: true, validator: longitude, trigger: "change" }],
        lat: [{ require: true, validator: latitude, trigger: "change" }],
      },
    };
  },
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finish(formName) {
  this.$refs[formName].validate((valid) => {
    if (valid) {
        console.log("验证通过");
     } else {
         console.log("error submit!!");
         return false;
     }
  });
}
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