AVUE组件或el-form动态修改rules验证规则

问题描述

根据条件修改验证规则:el-form中若A为空,则B可为空,若A有值,则B必填,动态改变B的验证规则

问题的解决原理

avue:

在watch监听事件中,使用auve-form自带的:defaults.sync="defaults"属性,来操作B的rules验证规则,此写法的效果好于el-form原生,因为设置为必填后会有必填标志*

el-form:

使用watch监听A值的变化,若A不为空,则操作B的验证规则(万金油)
tip:如果使用select单选框组件,也可在单选框@change事件中操作B的验证规则(特殊)

代码如下

Avue组件中:

//此处用applyType指代a ,taxNumber 指代B
<avue-form  :defaults.sync="defaults" v-model="modifyForm" :option="modifyOption" @submit="modificationSubmission"></avue-form>
...
data(){
	return{
		defaults:{},
		//avue配置项
		modifyOption: {
        submitText:'修改申报',
        menuPosition:'right',
        size:"mini",
        labelWidth:150,
        emptyBtn:false,
        column: [
          {
            label: '申报类型',
            prop: 'applyType',
            type: 'radio',
            span:24,
            rules: [{
              required: true,
              message: "请选择申报类型",
              trigger: "blur"
            }],
            dicData: radioList
          }]
          }
	}
}
...
watch:{
	'modifyForm.applyType'(val){
      if(val=== null || val === undefined || val === ''){
      //此处绑定的rules规则参考默认绑定rules
      this.defaults.taxNumber.rules = [
            {required: false,
              validator: validateCode1,
              trigger: "blur"}
          ]
     }else{
     this.defaults.taxNumber.rules = [
            {required: true,
              validator: validateCode1,
              trigger: "blur"}
          ]
     }
}

el-form原生组件中:

<el-form ref="ruleForm" :rules="rules" :model="form" label-width="220px">
	<el-form-item label="申报园区:" prop="applyPark">
		<el-select v-model="form.applyPark" placeholder="请选择" @change="changeApplyPark">
			<el-option
			 v-for="item in applyList"
			:key="item.value"
			:label="item.label"
			:value="item.value">
			</el-option>
		</el-select>
	</el-form-item>
	<el-form-item label="社会统一信用代码:" prop="taxNumber">
    	<el-input v-model="form.taxNumber"></el-input>
    </el-form-item>
</el-form>

...
export default{
	data(){
		return{
			applyList :[{
	        label:'公司',
	        value:0
	      },{
	        label:'分公司',
	        value:1
	      }],
	      //rules中要先声明一个不必填,否则下面的this.rules.taxNumber取不到
		    rules: {
		      applyPark: [
		        {required: true, message: "请选择申报类型", trigger: "blur"},
		      ],
		      taxNumber: [
		        {required: false, message: "请输入社会统一信用代码", trigger: "blur"},
		      ],
		    }
		}
	},
	methods:{
		changeApplyPark(){
			if(this.form.applyPark === null || this.form.applyPark === undefined || this.form.applyPark === ''){
			this.rules.taxNumber = [
			{required: false, message: "请输入社会统一信用代码", trigger: "blur"}
			]
			}else{
			this.rules.taxNumber = [
				{required: true, message: "请输入社会统一信用代码", trigger: "blur"}
			]
			}
		}
	}
}
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