vue elementUI 表单校验的实现代码（多层嵌套）

<template>
 <el-form :model="formData" :rules="formRule" ref="formData" label-width="100px">
    <el-form-item prop="name" label="姓名">
      <el-input v-model="formData.name" ></el-input>
    </el-form-item>
    <el-form-item prop="password" label="密码">
     <el-input v-model="formData.password" ></el-input>
    </el-form-item>
    <el-form-item prop="user.tel" label="手机号" >
     <el-input v-model="formData.user.tel" ></el-input>
    </el-form-item>
    <el-form-item prop="phones[0].model" label="手机号">
     <el-input v-model="formData.phones[0].model"></el-input>
    </el-form-item>
    <el-form-item v-for="(phone, index) in formData.phones" :label="phone.brand" :key="phone.brand" :prop="'phones.' + index + '.model'" :rules="{
     required: true, message: 'model不能为空', trigger: 'blur'
     }">
      <el-input v-model="phone.model"></el-input>
      <el-form :model="formData.phones[index]" label-width="100px">
         <el-form-item v-for="(item, index1) in formData.phones[index].arr" :key="index1" :prop="'arr.' + index1 + '.data1'" label="data1" :rules="{
         required: true, message: 'data1不能为空', trigger: 'blur'
         }">
           <el-input v-model="item.data1"></el-input>
         </el-form-item>
      </el-form>
    </el-form-item>
  </el-form>
  <el-button @click="handleSubmit">提交</el-button>  
</template>

data () {
  return {
   formData:{
     name: '',
     password: '',
     user: {
       tel: ''
     },
      phones: [
       { brand: "华为", model: "", arr: [{ data1: "" }] },
       { brand: "小米", model: "", arr: [{ data1: "" }] }
     ] 
   },
   formRule:{
    name: [{required: true, message: '不能为空', trigger: 'blur'},
        {pattern: /^[\u4E00-\u9FA5]+$/, message: '用户名只能为中文', trigger: 'blur'}],
    password: [{required: true, message: '不能为空', trigger: 'blur'},
     {validator: Verify.validatePassword, trigger: 'blur'},
    ],
    'user.tel' : [{required: true, message: '手机号码不能为空', trigger: 'blur'}],
    'phones[0].model': [{required: true, message: 'model不能为空', trigger: 'blur'}],
   },
  }
 },

methods: {
  handleSubmit(){
    const t = this;
    t.$refs['formData'].validate((valid) => {
      if(valid){
       console.log(this.formData);
      }
    })
  }
 }