elementui表单验证，数据层级过深验证失效

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。