<el-table class='product_table' :data="productData" border>    <el-table-column prop='name' label="起始卡號" align='center'>        <template slot-scope="scope">          <el-form :rules='rules' ref='cardStartNo'>            <el-form-item class='form-item' prop='cardStartNo' label=' '>              <el-input v-model='scope.row.cardStartNo'></el-input>                          </el-form-item>          </el-form>        </template>  </el-table-column></el-table>rules: {    cardStartNo: [      { required: true, message: '請輸入起始卡號', trigger: 'blur' }    ]}我的校驗規(guī)則為何沒有生效？