主要用于记录，若能帮到他人，也算是功德了，哈哈。
在原有基础上新增了组的概念（某些字段属于一个组，用的elementUI中的el-collapse区分），
不啰嗦了，直接上代码（可直接拷贝试用）
<template>
<div class="dynamicForm">
<el-collapse>
<el-collapse-item v-for="(collapse,index) in form.getData" :key="index">
<template slot="title">
{{collapse.groupName}}
<el-button type="primary" size="mini" @click.stop="groupChange(index,collapse)">复制组</el-button>
<el-button type="danger" size="mini" @click.stop="groupChange(index)">删除组</el-button>
</template>
{{collapse.computedRule}}
<el-form ref="getData" :model="collapse" label-width="80px">
<el-form-item v-for="(item,key) in collapse.groupList" :key="key" :label="item.label" v-show="!item.hide"
:prop="'groupList.' + key +'.value'" :rules="[{required: true, message: 'Can\'t be empty'}]">
<el-input v-model="item.value" :disabled="!item.formula"></el-input>
</el-form-item>
</el-form>
</el-collapse-item>
</el-collapse>
</div>
</template>
<script>
export default {
name: 'DynamicFormUpgrade',
data () {
return {
form: {
getData: [],
},
//存储所有watcher,增删组时需全部清除
formWatchers: [],
}
},
created () {
this.getDataFn();
},
mounted() {
//首次添加计算与约束规则
this.addComOrResRules();
},
methods: {
//增删组
groupChange(index,collapse){
//清空所有watcher
this.formWatchers.forEach(_ => _());
!!collapse ?
this.form.getData.splice(index,0,JSON.parse(JSON.stringify(collapse))) :
this.form.getData.splice(index,1);
this.addComOrResRules();
},
//
getDataFn() {
/*数据挡板--key1、key2等为表单字段唯一标识，通常格式固定，
方法内需根据此格式制定正则以便提取。*/
this.form.getData = [
{
computedRule: '计算规则：label1*label2-label3/label4=result1;空值按0计算',
groupKey: 'groupOne',
groupName: '组一test',
groupList: {
key1:{
formula: 'key1*key2-key3/key4=key5',
value: 5,
label: 'label1',
hide: false,
hideRule: null
},
key2:{
formula: 'key1*key2-key3/key4=key5',
value: 400,
label: 'label2',
hide: false,
hideRule: null
},
key3:{
formula: 'key1*key2-key3/key4=key5',
value: 30,
label: 'label3',
hide: false,
hideRule: null
},
key4:{
formula: 'key1*key2-key3/key4=key5',
value: 2,
label: 'label4',
hide: false,
hideRule: null
},
key5:{
formula: null,
value: null,
label: 'result1',
hide: false,
hideRule: null
},
key6:{
formula: null,
value: 'isShow: result1 >= 200',
label: 'visible1',
hide: false,
hideRule: 'key5 >= 200'
},
key7:{
formula: null,
value: 'isShow: label3-label1 >= 20',
label: 'visible2',
hide: false,
hideRule: 'key3-key1 >= 20'
},
key8:{
formula: null,
value: 'isShow: label3-label1 < label2',
label: 'visible3',
hide: false,
hideRule: 'key3-key1 < key2'
}
},
},
{
computedRule: '计算规则：label1+label2*label3-label4=result1;空值按0计算',
groupKey: 'groupTwo',
groupName: '组二test',
groupList: {
key1:{
formula: 'key1+key2*key3-key4=key5',
value: 150,
label: 'label1',
hide: false,
hideRule: null
},
key2:{
formula: 'key1+key2*key3-key4=key5',
value: 10,
label: 'label2',
hide: false,
hideRule: null
},
key3:{
formula: 'key1+key2*key3-key4=key5',
value: 300,
label: 'label3',
hide: false,
hideRule: null
},
key4:{
formula: 'key1+key2*key3-key4=key5',
value: 2,
label: 'label4',
hide: false,
hideRule: null
},
key5:{
formula: null,
value: null,
label: 'result1',
hide: false,
hideRule: null
},
key6:{
formula: null,
value: 'isShow: result1 >= 150',
label: 'visible1',
hide: false,
hideRule: 'key5 >= 150'
},
key7:{
formula: null,
value: 'isShow: label3-label1 < 200',
label: 'visible2',
hide: false,
hideRule: 'key3-key1 < 200'
},
key8:{
formula: null,
value: 'isShow: label3-label1 > label2',
label: 'visible3',
hide: false,
hideRule: 'key3-key1 > key2'
}
},
},
];
},
//添加计算与约束规则
addComOrResRules(){
//动态添加监听--数据结构与计算规则需前后端统一制定再进行代码调整
let _this = this;
this.form.getData.forEach((_, index) => {
Object.keys(_.groupList).forEach(__ => {
//计算
_.groupList[__].formula &&
_.groupList[__].formula.indexOf('=') > -1 &&
this.formWatchers.push(_this.$watch('form.getData.'+index + '.groupList.' + __, (n, o) => {
let res = n.formula.split('=')[0].replace(/[0-9A-Za-z]{4}/img, key => Number(_.groupList[key].value));
console.log('form.getData.'+ index + '.groupList.' + __, res);
_.groupList[n.formula.split('=')[1]].value = eval(res).toString().indexOf('Infinity') > -1 ? 'error' : eval(res);
},{deep: true,immediate: true}));
//约束
_.groupList[__].hideRule &&
_.groupList[__].hideRule.replace(/[0-9A-Za-z]{4}/img, key => {
this.formWatchers.push(_this.$watch('form.getData.'+ index + '.groupList.' + key, (n, o) => {
let res = _.groupList[__].hideRule.replace(/[0-9A-Za-z]{4}/img, item => Number(_.groupList[item].value));
_.groupList[__].hide = !eval(res);
},{deep: true,immediate: true}));
})
})
})
}
}
}
</script>
<style lang="scss" scoped>
.dynamicForm{
margin: 0 100px;
}
</style>
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