【element-plus 给form表单的对象数组添加prop属性】

对象数组 在form表单中添加 prop属性

//两种方式都可以添加prop 
<div v-for="(item ,index) in ruleForm.objArr" v-bind:key="index">
	<el-form-item 
		:label="'label' + index" 
		:prop="'objArr.'+index+'.a'"  //注意prop属性前一定要添加 ： 冒号
	>
	  <el-input v-model="item.a" />  //这里写item.a也可以监听到了
	</el-form-item>
	
	<el-form-item 
		:label="'label' + index" 
		:prop="['objArr',index,'b']" //注意prop属性前一定要添加 ： 冒号
	>
	  <el-input v-model="item.b" />
	</el-form-item>
</div>

<scriput setup>

// 测试表单对象
const ruleForm = reactive({
  objArr:[{
    a:1,
    b:2
  },{
    a:3,
    b:4
  },{
    a:5,
    b:6
  }],
})

</scriput >

参考官方文档链接: 添加/删除表单项

// 参考遍历dynamicValidateForm.domains数组
<template>
  <el-form
    ref="formRef"
    :model="dynamicValidateForm"
    label-width="120px"
    class="demo-dynamic"
  >
    <el-form-item
      prop="email"
      label="Email"
      :rules="[
        {
          required: true,
          message: 'Please input email address',
          trigger: 'blur',
        },
        {
          type: 'email',
          message: 'Please input correct email address',
          trigger: ['blur', 'change'],
        },
      ]"
    >
      <el-input v-model="dynamicValidateForm.email" />
    </el-form-item>
    <el-form-item
      v-for="(domain, index) in dynamicValidateForm.domains"  
      :key="domain.key"
      :label="'Domain' + index"
      :prop="'domains.' + index + '.value'"  //注意prop属性前一定要添加 ： 冒号
      :rules="{
        required: true,
        message: 'domain can not be null',
        trigger: 'blur',
      }"
    >
      <el-input v-model="domain.value" />
      <el-button class="mt-2" @click.prevent="removeDomain(domain)"
        >Delete</el-button
      >
    </el-form-item>
    <el-form-item>
      <el-button type="primary" @click="submitForm(formRef)">Submit</el-button>
      <el-button @click="addDomain">New domain</el-button>
      <el-button @click="resetForm(formRef)">Reset</el-button>
    </el-form-item>
  </el-form>
</template>

<script lang="ts" setup>
import { reactive, ref } from 'vue'
import type { FormInstance } from 'element-plus'

const formRef = ref<FormInstance>()
const dynamicValidateForm = reactive<{
  domains: DomainItem[]
  email: string
}>({
  domains: [
    {
      key: 1,
      value: '',
    },
  ],
  email: '',
})

interface DomainItem {
  key: number
  value: string
}

const removeDomain = (item: DomainItem) => {
  const index = dynamicValidateForm.domains.indexOf(item)
  if (index !== -1) {
    dynamicValidateForm.domains.splice(index, 1)
  }
}

const addDomain = () => {
  dynamicValidateForm.domains.push({
    key: Date.now(),
    value: '',
  })
}

const submitForm = (formEl: FormInstance | undefined) => {
  if (!formEl) return
  formEl.validate((valid) => {
    if (valid) {
      console.log('submit!')
    } else {
      console.log('error submit!')
      return false
    }
  })
}

const resetForm = (formEl: FormInstance | undefined) => {
  if (!formEl) return
  formEl.resetFields()
}
</script>