场景：在项目的开发过程中，经常使用到表单中嵌套着可编辑的表格，这个时候就需要表单的双重校验。
本文栗子为二次封装动态增减的可编辑表格，并实现表表单的双重校验
ps:由于实现的数据比较多，当前栗子为比较脱敏的，省略了一些字段，换汤不换药。

子组件 variableList.vue

<template>
    <article class="TPL_variable-list-container">

    <el-form
      ref="variableListForm"
      :model="formData"
    >
      <el-table
        v-show="formData.variableList.length"
        :data="formData.variableList"
        border
        style="width: 100%"
        class="form-item-content variable_tabel"
      >

        <!-- 变量-变量ID -->
        <el-table-column
          label="id"
          class="table-item variable-item-id variable-id"
        >
          <template slot-scope="scope">
            <el-form-item
              :prop="`variableList.${scope.$index}.id`"
              :rules="variableRules.id"
            >
              <el-input v-model.number="scope.row.id" class="table-item-content variable-id_input" />
            </el-form-item>
          </template>
        </el-table-column>

        <!-- 变量-变量名 -->
        <el-table-column
          label="name"
          class="table-item variable-item-name variable-name"
        >
          <template slot-scope="scope">
            <el-form-item
              :prop="`variableList.${scope.$index}.name`"
              :rules="variableRules.name"
            >
              <el-input v-model="scope.row.name" class="table-item-content variable-name_input" />
            </el-form-item>
          </template>
        </el-table-column>
  
      <!-- 变量-编辑 -->
        <el-table-column
          :label="variableLabels.operator"
          class="table-item variable-item-operator variable-operator"
          width="60"
        >
          <template slot-scope="scope">
             <i class="el-icon-remove remove" @click="removeVariable(scope.$index)" />
          </template>
        </el-table-column>
      </el-table>
    </el-form>
    <!-- 添加变量按钮 -->
    <el-link
      class="form-item-content"
      type="primary"
      :underline="false"
      icon="el-icon-circle-plus"
      @click.native="addVariable"
    >
     添加变量
    </el-link>
   </article>
</template>


<script>
export default {
  name: 'VariableList',
  props: {
    /**
     * 父组件model必须为object
     * 因为table中嵌套的form-item，所以table外层必须有el-form，el-form必须model，校验才生效
     * 且value默认传入的variableList属性，与table的绑定
     *  */
    value: { type: Object, default: () => {} }
  },
  data () {
    return {
      formData: {
        variableList: [] // 默认有该属性，且该属性名定义为variableList
      },
       variableRules: {
        id: [{
          required: true,
          message: `请填入变量id`,
          trigger: ['blur', 'change']
        },
        {
          type: 'number',
          message: '请输入数字'
        }],
        name: [{
          required: true,
          message: `请填入变量名`,
          trigger: ['blur', 'change']
        }]
      }
    }
  },
  watch: {
    value: {
      immediate: true,
      handler(newV) {
        this.formData = newV
      }
    }
  },
  methods: {
    // 添加变量
    addVariable() {
      const newVariable = {
        id: '',
        name: ''
      }
      this.pushVariable(this.formData.variableList, newVariable)
    },

    // 移除变量
    removeVariable(id) {
      this.spliceVariable(this.formData.variableList, id)
    }，
// 公共方法 - 添加变量
    pushVariable(list, obj) {
      list.push(obj)
    },

    // 公共方法 - 移除变量
    spliceVariable(list, id) {
      list.splice(id, 1)
    }
  }
}
</script>

子组件的使用

<template>
  <el-form
      ref="fatherForm"
      :model="dataForm"
      :rules="rules"'
      :label-width="'120px'"
      label-position="'right'"
      class="TPL_deploy_form"
    >
      <el-form-item
         label="name"
         class="form-item item-space-name"
         prop="name"
       >
          <el-input
            v-model="dataForm.name"
            class="form-item-content content_input name_input"
          />
      </el-form-item>

      <el-form-item
        label="变量"
        class="form-item item-variable"
      >
       <!-- deployTplForm 中必须有属性variableList数组（子组件中自定义的，这里传入的object需要包含该字段）  -->
        <!--  使用子组件 ：传入一个ref用于校验时获取子组件校验结果-->
        <variable-list ref="childrenForm" v-model="dataForm" />
      </el-form-item>

        <!-- footer -->
      <el-form-item class="form-item footer-conatiner">
          <el-button
            type="primary"
            icon="el-icon-plus"
            @click="OnSubmit"
          >
            提交
          </el-button>
      </el-form-item>

  </el-form>
</template>

<script>
// 引入子组件
import variableList from '@/business/tmp/variableList/index.vue'
export default {
  components: {
    variableList
  },
  data() {
    return {
        dataForm: {
          name: '',
          variableList: []
        },
    }
  },

methods: {
    // 表单校验：可用于多个表单同时校验
    getFormValidPromise(form) {
      return new Promise((resolve, reject) => {
        form.validate((res) => {
          resolve(res)
        })
      })
    },
  // 提交表单
    OnSubmit() {
      const father_form = this.$refs.fatherForm // 父表单
     // 获取子组件的表单，childrenForm：使用子组件时传的ref；variableListForm：子组件中el-form的ref
      const children_form = this.$refs.childrenForm.$refs.variableListForm 
      Promise.all(
        [father_form, children_form].map(this.getFormValidPromise)).then((res) => {
        const validateResult = res.every(item => !!item)
        if (validateResult) {
          console.log('两个表单都校验通过')
        } else {
          console.log('两个表单未校验通过')
        }
      })
    },
  }
}
</script>

效果

image.png

image.png