<el-form ref="form" :model="form" :rules="rules" label-width="110px" @submit.native.prevent>

<el-form-item label="客户名称:" size="small" prop="belongId">
  <el-input v-show="false" v-model="form.belongId"></el-input>
  <ComSelectorCustomer :value="form.customerName" @change="choice"></ComSelectorCustomer>
</el-form-item>

rules: {
     belongId: [{
      required: true,
      message: '不能为空',
      trigger: 'change'
     }]
}

<el-row v-for="(item, index) in form.warehouseList" :key="index">
  <el-col :span="21">
    <el-form-item label="厂库名称:" size="small" :prop="'warehouseList.' + index + '.factoryName'">
      <el-select
       v-model="item.factoryName"
       clearable
       filterable>
       <el-option
         v-for="(child, ind) in factoryList"
         :key="ind"
         :label="child.label"
         :disabled="child.disabled"
         :value="child.value"></el-option>
      </el-select>
    </el-form-item>
   </el-col>
</el-row>

from: {
    warehouseList: [{
      productList: [{
        productNumber: '',
        productUnitPrice: ''
      }]
    }]
  }

<div v-for="(itemChild, itemIndex) in item.productList" :key="itemIndex">
   <el-col :span="9">
   <el-form-item label="客户品名:" label-width="110px" size="small" :prop="'warehouseList.' + index + '.productList.' + itemIndex + '.productName'">
    <el-input v-show="false" v-model="itemChild.productName"></el-input>
    <ComSelectorProduct :value="itemChild.productName"
    @change="choice"></ComSelectorProduct>
   </el-form-item>
 </el-col>
 <el-col :span="4">
   <el-form-item label="数量:" label-width="60px" size="small" :prop="'warehouseList.' + index + '.productList.' + itemIndex + '.productNumber'">
    <el-input clearable v-model="itemChild.productNumber" placeholder="数量"></el-input>
   </el-form-item>
 </el-col>
</div>

setRulesProduct() {
        let that = this
        let list1 = that.form.warehouseList
        // let list2 = that.form.warehouseList.productList
        if (list1 && list1.length) {
          list1.forEach((item, i) => {
            that.rules['warehouseList.' + i + '.factoryName'] = [{
              required: true,
              message: '请选择厂库',
              trigger: 'change'
            }]
            that.rules['warehouseList.' + i + '.orderNumber'] = [{
              required: true,
              min: 1,
              max: 20,
              validator: (rule, value, callback) => {
                if (!value) {
                  callback(new Error('订单号不能为空'))
                } else if (value.length < 1 || value.length > 20) {
                  callback(new Error('订单号请保持在1-20字符内'))
                } else {
                  callback()
                }
              },
              trigger: 'blur'
            }]
            that.rules['warehouseList.' + i + '.deliveryTime'] = [{
              required: true,
              message: '请选择日期',
              trigger: 'blur'
            }]

            if (item.productList && item.productList.length) {
              item.productList.forEach((childItem, childIndex) => {
                that.rules['warehouseList.' + i + '.productList.' + childIndex + '.productName'] = [{
                  required: true,
                  message: '请选择产品',
                  trigger: 'change'
                }]
                that.rules['warehouseList.' + i + '.productList.' + childIndex + '.productNumber'] = [{
                  required: true,
                  min: 1,
                  max: 20,
                  validator: (rule, value, callback) => {
                    if (!value) {
                      callback(new Error('产品数量不能为空'))
                    } else if (value.length < 1 || value.length > 20) {
                      callback(new Error('产品数量请保持在1-20字符内'))
                    } else {
                      callback()
                    }
                  },
                  trigger: 'blur'
                }]
                that.rules['warehouseList.' + i + '.productList.' + childIndex + '.productUnitPrice'] = [{
                  required: true,
                  message: '请填写单价',
                  trigger: 'blur'
                }]
              })
            }
          })
        }
      }