在VueJS中动态添加选择字段和验证

<template>
  <div>
    <div v-for="(option, index) in options" :key="index">
      <label>{{ option.label }}</label>
      <select v-model="option.value">
        <option v-for="item in option.items" :value="item.value" :key="item.value">{{ item.label }}</option>
      </select>
    </div>
    <button @click="addOption">添加选择字段</button>
  </div>
</template>

<script>
export default {
  data() {
    return {
      options: [
        { label: '字段1', value: '', items: [{ label: '选项1', value: 'option1' }, { label: '选项2', value: 'option2' }] }
      ]
    };
  },
  methods: {
    addOption() {
      this.options.push({ label: '新字段', value: '', items: [] });
    }
  }
};
</script>

<template>
  <div>
    <div v-for="(option, index) in options" :key="index">
      <label>{{ option.label }}</label>
      <select v-model="option.value" v-validate="'required'">
        <option v-for="item in option.items" :value="item.value" :key="item.value">{{ item.label }}</option>
      </select>
      <span v-show="errors.has(option.label)">{{ errors.first(option.label) }}</span>
    </div>
    <button @click="addOption">添加选择字段</button>
  </div>
</template>

<script>
import { ValidationProvider, ValidationObserver, extend } from 'vee-validate';
import { required } from 'vee-validate/dist/rules';

extend('required', {
  ...required,
  message: '该字段为必填项'
});

export default {
  components: {
    ValidationProvider,
    ValidationObserver
  },
  data() {
    return {
      options: [
        { label: '字段1', value: '', items: [{ label: '选项1', value: 'option1' }, { label: '选项2', value: 'option2' }] }
      ]
    };
  },
  methods: {
    addOption() {
      this.options.push({ label: '新字段', value: '', items: [] });
    }
  }
};
</script>