博客原文地址https://finget.github.io/2020/02/11/element-form/
第一种 最简单的必填字段
<el-form-item
label="委托方"
prop="real_operator_id"
>
<operators-select v-model="form.real_operator_id"></operators-select>
</el-form-item>rules: {
real_operator_id: {required: true, message: '请选择委托方', trigger: 'change'}
}第二种 正则验证字段
<el-form-item
label="容纳人数"
prop="capacity"
>
<el-input
v-model="form.capacity"
placeholder="请输入容纳人数"
></el-input>
</el-form-item>rules:{
capacity: [
{required: true, message: '请输入容纳人数', trigger: 'change'},
{pattern: /^[1-9][0-9]{0,3}$/, message: '只能输入正整数，且不超过4位数', trigger: 'change'}],
}⚠️什么电话、邮箱、数字、英文、汉字...等能用正则验证都可以用这个方式。
第三种 富文本必填验证
<el-form-item
label="政策内容"
prop="content"
>
<Tinymce
ref="editor"
v-model="form.content"
:height="300"
/>
<el-input
v-model="form.content"
style="display:none;"
></el-input>
</el-form-item>rules: {
content: [
{required: true, message: '请填写政策内容', trigger: 'change'}
],
}这里采用一个骚操作，原本输入框的验证都是监听的输入框的各种事件（change,blur）,然而富文本都是第三方插件，无法监听到，所以就利用了vue的双向绑定原理，写一个隐藏的输入框，搞定。
第四种 多个输入框
<el-form-item
label="关联写字楼"
prop="building_id"
>
<div class="display-flex align-items-center">
<el-select
v-model="form.building_id"
filterable
remote
placeholder="请输入写字楼名称"
:remote-method="getProjectLists"
:loading="loading"
@change="getBuilding">
<el-option
v-for="item in projectOptions"
:key="item.id"
:label="item.project_name"
:value="item.id">
</el-option>
</el-select>
<el-select
class="marginL10"
v-if="form.building_id"
v-model="form.building_detail.id"
placeholder="请选择楼栋"
@change="getUnit">
<el-option
v-for="item in buildingList"
:key="item.id"
:label="item.building_name"
:value="item.id">
</el-option>
</el-select>
<el-select
class="marginL10"
v-if="unitList.length && form.building_detail.id"
v-model="form.building_detail.unit_id"
placeholder="请选择单元"
@change="changeUnit">
<el-option
v-for="item in unitList"
:key="item.id"
:label="item.unit"
:value="item.id">
</el-option>
</el-select>
<numberInput
:append="'层'"
:isDecimal="false"
:intlength="4"
:placeholder="'请输入楼层'"
v-model="form.building_detail.floor"></numberInput>
</div>
</el-form-item>data() {
let checkBuilding = (rule, value, callback) => {
if (!this.form.building_id) {
callback(new Error('请选择写字楼'));
} else if (!this.form.building_detail.id) {
callback(new Error('请选择楼栋'));
} else if (this.unitList.length && !this.form.building_detail.unit_id) {
callback(new Error('请选择单元'));
} else if (!this.form.building_detail.floor) {
callback(new Error('请填写楼层'));
} else {
callback();
}
};
return {
rules: {
building_id: {required: true, validator: checkBuilding, trigger: 'change'},
}
}
}第五种 动态验证-普通的动态验证
官网拷贝的代码，占个位置。
<el-form-item
v-for="(domain, index) in dynamicValidateForm.domains"
:label="'域名' + index"
:key="domain.key"
:prop="'domains.' + index + '.value'"
:rules="{
required: true, message: '域名不能为空', trigger: 'blur'
}"
>
<el-input v-model="domain.value"></el-input>
<el-button @click.prevent="removeDomain(domain)">删除</el-button>
</el-form-item>第六种 动态验证-多个输入框验证
第一种情况 每个输入框单独验证
在样式很好控制的情况下,循环生成多个<el-form-item>,单独验证
<div
v-for="(item,index) in form.project"
:key="index"
>
<div class="display-flex">
<el-form-item
:label="index==0?'关联写字楼':''"
:prop="'project.' + index + '.project_id'"
:rules="{required: true, message: '请选择关联写字楼', trigger: 'blur'}">
<el-select
v-model="item.project_id"
filterable
clearable
remote
reserve-keyword
placeholder="请输入关键词"
:remote-method="getProjectLists"
:loading="loading"
@change="projectChange($event,index)">
<el-option
v-for="item in projectOptions"
:key="item.id"
:label="item.project_name"
:value="item.id">
</el-option>
</el-select>
</el-form-item>
<el-form-item
label-width="20px"
:prop="'project.' + index + '.building_id'"
:rules="{required: true, message: '请选择关联写字楼楼栋', trigger: 'blur'}">
<el-select
v-model="item.building_id"
placeholder="请选择楼栋"
@change="buildChange($event,index)">
<el-option
v-for="item in item.buildOptions"
:key="item.id"
:label="item.building_name"
:value="item.id">
</el-option>
</el-select>
</el-form-item>
<el-form-item
v-if="item.unitOptions && item.unitOptions.length"
label-width="20px"
:prop="'project.' + index + '.unit_id'"
:rules="{required: true, message: '请选择关联写字楼单元', trigger: 'blur'}">
<el-select
v-model="item.unit_id"
placeholder="请选择单元">
<el-option
v-for="item1 in item.unitOptions"
:key="item1.id"
:label="item1.unit"
:value="item1.id">
</el-option>
</el-select>
</el-form-item>
<el-form-item
label="所在楼层"
:prop="'project.' + index + '.floor'"
:rules="[{required: true, message: '请填写所在楼层', trigger: 'blur'},
{pattern: /^([1-9][0-9]{0,2})$/,message:'只能输入正整数，且不超过三位数',trigger:'change'}]">
<div class="display-flex">
<el-input
v-model.number="item.floor"
placeholder="请填写楼层，3位数以内"
autocomplete="off">
<el-button slot="append">层</el-button>
</el-input>
</div>
</el-form-item>
</div>
</div>第二种情况 统一验证
有的时候，迫于样式的困扰，我们只能写多个输入框，而不能生成多个<el-form-item>,在同一个<el-form-item>下统一验证
<div style="list-style:none;"
v-for="(item, index) in form.rules"
:key="index">
<el-form-item
:label="index == 0?'添加规则(未到使用时间)':''"
:prop="'rules.'+index+'.hours'"
:rules ="{required:true, validator:checkRules , trigger: 'change'}">
<div class="display-flex li-box">
<div>
<span>使用前 </span>
<numberInput
class="small-input"
size="small"
v-model="item.hours"
:isDecimal="false"
:intlength="4"
:clearable="false"
placeholder=""/>
<span> 小时取消，扣除订单总额 </span>
<numberInput
class="small-input"
size="small"
v-model="item.percent"
:isDecimal="false"
:clearable="false"
:intlength="3"
placeholder=""/>
<span> %费用(不含保证金)</span>
</div>
</div>
</el-form-item>
</div>rule长这样:
methods: {
// 验证rule
checkRules(rule, value, callback) {
// 通过rule.field 拿到index ，剩下的都常规操作了
let index = rule.field.split('.')[1] - 0;
if (!this.form.rules[index].hours || !this.form.rules[index].percent) {
callback(new Error('请填写规则'));
} else if (Number(this.form.rules[index].percent) > 100) {
callback(new Error('百分比不能超过100%'));
} else {
callback();
}
},
}第七种 动态验证-关联验证
填了租金才会触发对应的租金时间段验证
<div
v-for="(item, index) in form.payment.rent_period"
:key="'rent' + index"
>
<el-form-item
:label="'租金'+(index+1)"
class="flex-1"
:prop="'payment.rent_period.'+index+'.rent_fee'"
:rules ="{validator:moneyValidator, trigger:'change'}"
>
</el-form-item>
<el-form-item
class="flex-1"
label="租金时间段"
:prop="'payment.rent_period.'+index+'.start_time'"
// 就是这里判断一下item.rent_fee是否存在
:rules="item.rent_fee?{required: true, message:'请填写租金时间段', trigger: 'change'}:{}">
</el-form-item>
</div>第八种 动态验证-判重
<el-form-item
v-for="(item,index) in industryForm.follow"
:key="item.id"
:label="'关注行业'+(index+1)"
:prop="'follow.'+index+'.industry'"
:rules="{validator: attentionIndustryValidator, trigger:'change'}"
>
....
</el-form-item>attentionIndustryValidator(rule, val, callback) {
let num = 0;
this.industryForm.follow.forEach(item => {
// 这里做一次数组判重
if (this.equals(val, item.industry)) {
num++;
}
});
if (num >= 2) {
callback(new Error('请勿重复选择相同的行业!'));
} else {
callback();
}
},第九种 清除某一个输入项验证
如图开始选择了意向类型为按面积，此时已经验证了意向面积的值，并提示错误信息，然后切换为按工位,如果不清除意向面积的验证，则错误信息会一直存在。
<el-form-item
ref="areaForm"
prop="intention_area"
:label="form.intention_type==1?'意向面积':'意向工位'"
:label-width="formLabelWidth"
:rules="[{required:true, validator: areaValidator, trigger:'blur'}]">
...
</el-form-item>watch: {
'form.intention_type': {
handler() {
this.$refs['areaForm'].clearValidate();
}
}
},最后
我们自定义验证（validator），有两种方式。
- 第一种 定义在data中
data() {
let testrule1 = (rule,val,callback) => {};
return {}
}使用方式是在data中的rule里引入：
data(){
let testRule1 = (rule,val,callback) => {};
return {
rules: {
name:{required: true, validator:testRule1, trigger:'blur'}
}
}
}- 第二种 定义在methods中
methods: {
testRule2(rule, val, callback) {}
}使用方式是在<el-form-item>中引入:
<el-form-item
prop="name"
:rules="{required:true, validator: testRule2, trigger:'blur'}">
...
</el-form-item>
**粗体** _斜体_ [链接](http://example.com) `代码` - 列表 > 引用。你还可以使用@来通知其他用户。