vue2 antd+form表单+验证async-validator实现多选：仅选择一个分组，且分组内进行多选

1. 使用form表单渲染select

• ref为参考值，prop为规则验证
• data_tpye_dict.baseGrop为预先定位的分组
• mode=“multiple” 为多选

<a-form-model-item ref="data_type" label="模型算法" prop="data_type"
                   v-if="activeKey == '地类分割成果服务' || activeKey == '目标检测成果服务'">
  <a-select placeholder="请选择模型算法" v-model:value="form.data_type" mode="multiple">
    <a-select-opt-group mode="multiple">
      <span slot="label" style="font-size:16px;color:#177DE4;">
        <i class="iconfont icon-groai-base" style="margin-right: 8px;"/>基础模型
      </span>
      <a-select-option v-for="item in data_tpye_dict.baseGrop"
                       :value="item.key">{{ item.value }}
      </a-select-option>
    </a-select-opt-group>
    <a-select-opt-group mode="multiple">
      <span slot="label" style="font-size:16px;color:#177DE4;">
        <i class="iconfont icon-geoai-interest" style="margin-right: 8px;"/>兴趣模型
      </span>
      <a-select-option v-for="item in data_tpye_dict.interestGrop"
                       :value="item.key">{{ item.value }}
      </a-select-option>
    </a-select-opt-group>
  </a-select>
</a-form-model-item>

2. 定义的字典项

const data_tpye_dict = {
  interestGrop: [
    {key: "interest_excavator", value: "挖掘机"},
    {key: "interest_playground", value: "操场"},
    {key: "interest_steamboat", value: "轮船"},
    {key: "interest_plane", value: "飞机"}
  ],
  baseGrop: [
    {key: "base_building", value: "建筑物"},
    {key: "base_woodland", value: "林地"},
    {key: "base_landConstruction", value: "建设用地"},
    {key: "base_road", value: "道路"},
    {key: "base_plough", value: "飞机"},
    {key: "base_river", value: "水系"},
  ],
}

3. 验证规则

• 表单验证使用antd推荐的async-validator
• github：https://github.com/yiminghe/async-validator
• 思路：匹配前一个关键字，不一致pop剔除

// 验证函数
const validDataType = (rule, value, callback) => {
  let keyHeader = value[0].split("_")[0]
  if (value[value.length - 1].indexOf(keyHeader) !== -1) {
    return callback();
  } else {
    value.pop()
    this.$message.warning("基础模型与兴趣模型无法同时选中！", 3)
    return callback(new Error('基础模型与兴趣模型无法同时选中！'));
  }
}
// 验证规则
form: {
  data_type: undefined
},
rules: {
  data_type: [
    {required: true,type: 'array',message: '请选择模型算法！',trigger: 'change'},
    {validator: validDataType, trigger: 'change'}
  ],
}