<!-- 一级表单 -->
<el-form class="form" ref="form" :model="form" :rules="form_rules" size="small">
 <el-form-item label="红包活动标题" prop="name">
 <el-input v-model='form.name' placeholder="请输入红包活动标题（活动展示）" />
 </el-form-item>
 <el-form-item :label="`奖励设置(${form.seconde_form.length}/${max_reward_module_num})`" prop="seconde_form">
 <el-card class="reward_module" v-for="(second_form, second_form_index) in form.seconde_form" :key="`${second_form_index}_second_form`">
  <!-- 二级表单 -->
  <el-form class="second_form" :ref="`second_form_${second_form_index}`" :model="second_form" :disabled="is_form_item_disabled" inline size="small">
  <el-form-item prop="packet_name" :key="`${second_form_index}_packet_name`" :rules="[{ required: true, message: '请输入奖励名称', trigger: 'change' }]" style="width:150px;margin-right:20px;">
   <el-input v-model="second_form.packet_name" />
  </el-form-item>
  </el-form>
 </el-card>
 </el-form-item>
</el-form>

form: {
 name: '',
 seconde_form: [
 {
  packet_name: '',
 },
 ],
},

/**
 * 表单校验方法
 * @param {String} form_name
 */
function $check_form(form_name) {
 const form_component = this.$refs[form_name][0] "htmlcode">

async checkParam(form_name) {
 try {
 await this.$check_form(form_name);
 for (let i = 0; i < this.form.seconde_form.length; i++) {
  await this.$check_form(`second_form_${i}`);
 }
 // next step do something
 } catch (e) {
 console.log(e);
 }
},