Element-ui 中对表单(Form)绑定的对象中的对象属性进行校验

如果是直接绑定属性,是可以的,但是绑定对象中的属性就需要特别处理,需要在rules中添加双引号 " "或者''

<template>
  <div class="about">
    <el-form :model="ruleForm" :rules="rules" ref="ruleForm" label-width="100px" class="demo-ruleForm">
      <el-form-item label="活动名称" prop="name">
        <el-input v-model="ruleForm.name"></el-input>
      </el-form-item>
      <el-form-item label="活动区域" prop="region">
        <el-select v-model="ruleForm.region" placeholder="请选择活动区域">
          <el-option label="区域一" value="shanghai"></el-option>
          <el-option label="区域二" value="beijing"></el-option>
        </el-select>
      </el-form-item>
      // 注意这里
      <el-form-item label="活动形式" prop="activity.type">
        <el-input v-model="ruleForm.activity.type"></el-input>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" @click="submitForm('ruleForm')">立即创建</el-button>
        <el-button @click="resetForm('ruleForm')">重置</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        ruleForm: {
          name: '',
          region: '',
          activity:{
            type:""
          }
        },
        rules: {
          name: [
            { required: true, message: '请输入活动名称', trigger: 'blur' },
            { min: 3, max: 5, message: '长度在 3 到 5 个字符', trigger: 'blur' }
          ],
          region: [
            { required: true, message: '请选择活动区域', trigger: 'change' }
          ],
          // 注意这里
          "activity.type": [
            { required: true, message: '请输入活动名称', trigger: 'blur' },
            { min: 3, max: 5, message: '长度在 3 到 5 个字符', trigger: 'blur' }
          ],
        }
      }
    },
    methods:{
      submitForm(formName) {
        this.$refs[formName].validate((valid) => {
          if (valid) {
            alert('submit!');
          } else {
            console.log('error submit!!');
            return false;
          }
        });
      },
      resetForm(formName) {
        this.$refs[formName].resetFields();
      }
    },
  }
  </script>

原文链接:

vue使用Element组件时v-for循环里的表单项验证方法

Element组件有一套完善的表单验证方法,官方文档写的也很清楚:Element表单验证API,正常按照官方文档添加rules规则,需要验证的表单项设置prop,然后提交表单时通过form的validate方法验证表单项就可以了。

然鹅问题来了,如果表单项里有通过v-for动态生成的表单项,如何设置验证呢?这个官方文档并没有明确的说法,我们通过查找解决方案和实际验证,总结出来解决方法如下。

首先是循环表单项没有加验证之前的代码:

<template>
 <div class="content-body">
  <el-form ref="form" :model="form" :rules="rules" label-width="120px">
   <el-row :gutter="10">
    <el-col :span="12" :offset="0">
     <el-form-item label="套餐名称:" prop="activityName" id="activityName">
      <el-input v-model="form.activityName"></el-input>
     </el-form-item>
    </el-col>
   </el-row>
   <el-row :gutter="10">
    <el-col :span="12">
     <el-form-item label="状态:">
      <el-radio v-model="form.status" label="1">上线</el-radio>
      <el-radio v-model="form.status" label="0">下线</el-radio>
     </el-form-item>
    </el-col>
   </el-row>
   <el-row :gutter="10">
    <el-col :span="2" style="width:120px;">
     <div class="sub-title">梯度设置:</div>
    </el-col>
    <el-col :span="20">
      <el-row :gutter="10" v-for="(item,index) in form.productGroup" :key="index">
       <el-col :span="6">
        <el-form-item label="商品数量:">
         <el-input v-model="item.num" type="number" size="small" style="width:80px;"></el-input>
        </el-form-item>
       </el-col>
       <el-col :span="6">
        <el-form-item label="优惠价格:">
          <el-input v-model="item.price" type="number" size="small" style="width:80px;"></el-input>
        </el-form-item>
       </el-col>
       <el-col :span="4">
        <i class="el-icon-remove-outline" @click="deleteLadder(index)"></i>  
        <i class="el-icon-circle-plus-outline" @click="addLadder" v-if="index==0"></i>
       </el-col>
      </el-row>
    </el-col>
   </el-row>
   <el-form-item size="medium" class="div-submit">
    <el-button @click="resetForm('form')">取消</el-button>
    <el-button type="primary" @click="submitForm('form')">提交</el-button>
   </el-form-item>
  </el-form>
 </div>
</template>
<script>
/* eslint-disable */
export default {
 data() {
  return {
   form: {
    activityName: '',
    status: '1',
    productGroup: [{num:"",price:""}]
   },
   rules: {
    activityName: [
     { required: true, message: '请输入套餐名称', trigger: 'blur' }
    ]
   }
  }
 },
 methods: {
  deleteLadder(index)
  {
   if(this.form.productGroup.length>1){
    this.form.productGroup.splice(index,1);
   }
  },
  addLadder()
  {
   this.form.productGroup.push({num:"",price:""});
  },
  submitForm(formName)
  {
   console.log("activityName...",this.form.activityName);
   this.$refs[formName].validate((valid,obj) => {
    if (valid) {
     this.submitFormAction();
    } else {
     this.$message.error("验证不通过");
    }
   });
  },
  submitFormAction()
  {
   this.$message.success("提交成功");
  },
  resetForm(formName)
  {
   this.$refs[formName].resetFields();
   this.form.productGroup = [{num:"",price:""}];
  }
 }
}
  
</script>
<style>
.el-form-item {
 margin-bottom: 20px;
}
</style>

  首先是添加rules规则,这个和正常添加规则一样:

productGroupRules: {
 productGroupNum: [{required: true, message: '请填写商品数量', trigger: 'blur'}],
 productGroupPrice: [{required: true, message: '请填写优惠价格', trigger: 'blur'}]
}

  然后给表单项添加验证,以商品数量为例:

<el-form-item label="商品数量:" :prop="'productGroup.'+index+'.num'" :rules="productGroupRules.productGroupNum">
 <el-input v-model="item.num" type="number" size="small" style="width:80px;"></el-input>
</el-form-item>

  

注意这里:rules是每个表单项都要添加,有多个的话用productGroupRules.productGroupNum这样的形式区分,对应上面productGroupRules里的内容。

另外主要就是:prop了,注意正常验证表单项是prop,而这里是:prop
:prop="'productGroup.'+index+'.num'"是拼接的形式,前面是v-for绑定的数组,中间是数组索引index,最后是表单项绑定的v-model的名称,然后用点.把它们连接起来。这三项都必须保证正确,错一个都无法验证。

另外就是要注意,v-for绑定的数组也必须绑定在form对象里,注意上面的data里:

form: {
 activityName: '',
 status: '1',
 productGroup: [{num:"",price:""}]
}
如果是:
  
form: {
 activityName: '',
 status: '1'
},

  


productGroup: [{num:"",price:""}]


是无法验证的,这一点也要注意。

好了,以上就是解决vue使用Element组件时v-for循环里的表单项验证的解决方案了,希望能帮助到遇到此问题的同学。