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先看示例代码，代码为模拟动态获取表单数据，然后动态添加rules验证规则，示例表单内输入框绑定form内第四层：

<template><el-form :model="form" :rules="rules" ref="ruleForm" label-width="100px" class="demo-ruleForm"><el-form-item:label="'name'+index"v-for="(item,index) in 5":key="index":prop="'name' + index"><el-input v-model="form.data.top.nameList['name'+index]"></el-input></el-form-item><el-form-item><el-button type="primary" @click="submitForm">立即创建</el-button></el-form-item></el-form>
</template><script>
export default {data() {return {form: {data: {top: {nameList: {}}}},rules: {}};},created() {for (let i = 0; i < 5; i++) {this.rules["name" + i] = [{ 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() {console.log(this.rules)console.log(this.form)this.$refs.ruleForm.validate(valid => {if (valid) {console.log('验证通过');} else {return false;}});}}
};
</script>

效果如下：

可以看到验证规则已经绑定到了输入框，但验证规则却是失效的

点一下按钮看看表单内容和rules的内容，像是没问题的

想要实现验证，需要修改标签内prop属性与rules内属性名。改动如下

:prop="'name' + index" //原
:prop="'data.top.nameList.name' + index" //改后this.rules["name" + i] = [{ 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" }
]; //原this.rules["data.top.nameList.name" + i] = [{ 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" }
]; //改后

全部代码如下：

<template><el-form :model="form" :rules="rules" ref="ruleForm" label-width="100px" class="demo-ruleForm"><el-form-item:label="'name'+index"v-for="(item,index) in 5":key="index":prop="'data.top.nameList.name' + index" //修改了这里><el-input v-model="form.data.top.nameList['name'+index]"></el-input></el-form-item><el-form-item><el-button type="primary" @click="submitForm">立即创建</el-button></el-form-item></el-form>
</template><script>
export default {data() {return {form: {data: {top: {nameList: {}}}},rules: {}};},created() {for (let i = 0; i < 5; i++) {this.rules["data.top.nameList.name" + i] = [ //修改了这里{ 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() {console.log(this.rules)console.log(this.form)this.$refs.ruleForm.validate(valid => {if (valid) {console.log('验证通过');} else {return false;}});}}
};
</script>

 看一看功能：

点击按钮看一下表单和rules的内容：

总结：将prop绑定为form对象下直到要验证的数据，rules中属性名保证和prop相同。