vue.js记录-表单-父组件调用子组件的表单验证

记录父组件中调用子组件的表单验证

子组件实现表单验证

　　子组件中需要实现调用表单验证的方法，子组件OrderInput.vue如下代码：

<template>
  <div>
    <el-form :model="postForm" ref="postForm" label-width="100px" class="demo-ruleForm">
      <el-form-item
        label="数值"
        prop="num"
        :rules="[{ required: true, message: '不能为空', trigger: 'change'}]"
      >
        <el-input type="number" v-model.number="postForm.num" autocomplete="off"></el-input>
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
export default {
  props: {
    obj: {
      type: Object,
      default: undefined
    }
  },
  data(){
    return {
        postForm: {
            num: this.obj?this.obj.num:undefined
        }
    }
  },
  methods: {
    submitForm () {
        return new Promise(function (resolve, reject) {
            this.$refs.postForm.validate(valid => {
                resolve(valid)
            })
        })
    }
  }
}
</script>

submitForm()方法，就是子组件中实现的调用当前表单验证的方法

父组件设置子组件的ref

　　父组件需要在使用子组件是，为子组件定义ref，之后再通过refs获取子组件对象调用子组件的表单验证方法。父组件实现如下：

<template>
  <div>
    <h1>验证表单</h1>
    <order-input ref="order" :obj="postForm"></order-input>
    <el-button
      type="primary"
      @click="handleClick"
    >
      提交
    </el-button>
  </div>
</template>

<script>
import OrderInput from './OrderInput'

export default {
  components: {
    OrderInput
  },
  data () {
    return {
      postForm: {
        age: undefined
      }
    }
  },
  methods: {
    handleClick () {
      this.$refs.order.submitForm().then(valid => {
        if(valid){
            console.log(valid, '提交表单')
        }else{
            console.log(valid, '验证不通过')
        }
      })
    }
  }
}
</script>