前面的代码为父组件后为子组件要求只修改父组件的代码实现在选择业务类型后业务子类型的disabled状态为false

为了实现选择业务类型后业务子类型的 `disabled` 状态变为 `false`，可以在父组件中监听 `configOrderMainType` 的变化，并在变化时更新 `formConfig` 中对应字段的 `disabled` 属性。

以下是修改后的父组件代码：

<template>
  <a-card :bordered="false">
    <!-- 查询区域 -->
    <div class="table-page-search-wrapper" ref="searchContent">
      <DynamicForm
        ref="dynamicForm"
        :formConfig="formConfig"
        @submit="searchConfig"
        @showMoreChange="showMoreChange"
        @resizeChange="showMoreChange"
      />
    </div>
    <!-- 查询区域-END -->

    <!-- 操作按钮区域 -->
    <div class="table-operator"></div>

    <!-- 展示金额区域 -->
    <div class="moneyTotal">
      <span>欠费金额(元)：{{ arrearsMoney.toFixed(2) }}</span>
      <span>欠费用量(m³)：{{ arrearsGas.toFixed(2) }}</span>
    </div>

    <!-- table区域-begin -->
    <div>
      <div class="ant-alert ant-alert-info" style="margin-bottom: 16px;">
        <i class="anticon anticon-info-circle ant-alert-icon"></i>
        已选择 <a style="font-weight: 600">{{ selectedRowKeys.length }}</a>项
      </div>
      <a-table
        ref="table"
        :size="tableSize"
        :scroll="{ x: true, y: tableHeight }"
        bordered
        rowKey="id"
        :columns="columns"
        :dataSource="dataSource"
        :pagination="ipagination"
        :loading="loading"
        :rowSelection="{ selectedRowKeys: selectedRowKeys, onChange: onSelectChange }"
        class="j-table-force-nowrap local-table"
        @change="handleTableChange"
      >
        <!-- 各种列模板 -->
      </a-table>
      <div class="selectedAndSetEmpty">
        已选择 {{ selectedRowKeys.length }} 项
        <a-button @click="onClearSelected">清空</a-button>
      </div>
      <BottomSettingColumns
        :loading="loading"
        :settingColumns="settingColumns"
        :settingChecked="settingChecked"
        :serialNumber="serialNumber"
        @emitEvent="emitEvent"
        @changeSettingColumns="changeSettingColumns"
      />
    </div>
    <biz-transaction-bill-item-list ref="billDetail"></biz-transaction-bill-item-list>
    <biz-liquidated-damages-item-list ref="liquidatedDamagesDetail"></biz-liquidated-damages-item-list>
  </a-card>
</template>

<script>
import { initColumnsMixin } from '@/mixins/publicInitColumnsMixinNew';
import '@/assets/less/TableExpand.less';
import { mixinDevice } from '@/utils/mixin';
import { JeecgListMixin } from '@/mixins/JeecgListMixin';
import JDate from '@/components/jeecg/JDate.vue';
import JSuperQuery from '@/components/jeecg/JSuperQuery.vue';
import BizTransactionBillItemList from './BizTransactionBillItemList.vue';
import BizLiquidatedDamagesItemList from './BizLiquidatedDamagesItemList.vue';
import JEllipsisHead from '@comp/jeecg/JEllipsisHead';
import { getAction, postAction } from '@/api/manage';
import moment from 'moment';

export default {
  name: 'BizTransactionBillList',
  mixins: [JeecgListMixin, mixinDevice, initColumnsMixin],
  components: {
    JDate,
    JSuperQuery,
    BizTransactionBillItemList,
    BizLiquidatedDamagesItemList,
    JEllipsisHead
  },
  props: {
    householdNum: {
      type: String,
      default: ''
    }
  },
  data() {
    return {
      formData: {
        configOrderMainType: '',
        configOrderSubType: ''
      },
      formConfig: [
        // ... 其他配置项 ...
        {
          label: '业务类型',
          type: 'dict-select',
          model: 'configOrderMainType',
          props: { placeholder: '请选择业务类型' },
          colSpan: { xl: 6, lg: 7, md: 8, sm: 24 },
          dictCode: 'order_main_type',
          isDate: false
        },
        {
          label: '业务子类型',
          type: 'select',
          model: 'configOrderSubType',
          props: { placeholder: '请选择业务子类型' },
          colSpan: { xl: 6, lg: 7, md: 8, sm: 24 },
          isDate: false,
          disabled: true
        }
      ],
      description: '缴费账单管理界面',
      configOrderSubTypeList: [],
      btnSatus: false,
      // ... 其他数据属性 ...
    };
  },
  created() {
    this.excessHeight = 380;
    this.getSuperFieldList();
  },
  computed: {
    isGasSearchShow() {
      return this.$store.getters.isGasSearchShow;
    }
  },
  methods: {
    loadOther() {
      if (this.householdNum) {
        this.btnSatus = true;
        this.queryParam.householdNum = this.householdNum;
      }
    },
    updateTableHeight() {
      const headerHeight = 100;
      const footerHeight = 50;
      this.tableHeight = window.innerHeight - headerHeight - footerHeight;
    },
    initCreated() {
      if (!this.queryParam.householdNum) {
        this.queryParam.createTime_begin = moment().subtract(1, 'month').format('YYYY-MM-DD 00:00:00');
        this.queryParam.createTime_end = moment().format('YYYY-MM-DD 23:59:59');
      }
      this.queryParam = { ...this.queryParam };
    },
    getGasMoney() {
      getAction('/web/bizTransactionBill/arrearsGasAndMoney', this.queryParam).then((res) => {
        if (res.success) {
          this.arrearsGas = res.result.arrearsGas || 0;
          this.arrearsMoney = res.result.arrearsMoney || 0;
        }
      });
    },
    handelChange() {
      this.queryParam.configOrderSubType = undefined;
    },
    setConfigAct() {
      if (!this.isGasSearchShow) {
        this.formConfig = this.formConfig.filter((item) => item.model !== 'companyCode');
      }
      const businessSubTypeItem = this.formConfig.find((item) => item.model === 'configOrderSubType');
      const isRentalUserItem = this.formConfig.find((item) => item.model === 'isRentalUser');
      const isLoneOldItem = this.formConfig.find((item) => item.model === 'isLoneOld');
      const isornot = [{ value: '1', label: '是' }, { value: '0', label: '否' }];
      if (isLoneOldItem) isLoneOldItem.options = isornot;
      if (isRentalUserItem) isRentalUserItem.options = isornot;
      const configOrderSubTypes = [
        { value: 'subtype1', label: '工商户报装' },
        { value: 'subtype2', label: '埋管' },
        { value: 'subtype3', label: '检修' },
        { value: 'subtype4', label: '系统扣费' }
      ];
      if (businessSubTypeItem) businessSubTypeItem.options = configOrderSubTypes;
    },
    searchBillQuery() {
      this.searchQuery();
      this.getGasMoney();
    },
    searchResetCustom() {
      if (this.householdNum) {
        this.queryParam = { householdNum: this.householdNum };
      } else {
        this.queryParam = {};
      }
      this.initCreated();
      this.loadData(1);
      this.getGasMoney();
    },
    getConfigOrderSubTypeList() {
      if (this.queryParam.configOrderMainType) {
        getAction('/web/bizTransactionOrder/getOrderSubType', { configOrderMainType: this.queryParam.configOrderMainType }).then((res) => {
          if (res.code == 200) {
            this.configOrderSubTypeList = res.result;
            this.updateConfigOrderSubTypeDisabled();
          }
        });
      } else {
        this.$message.warning('请选择业务类型！');
      }
    },
    initDictConfig() {},
    getSuperFieldList() {
      let fieldList = [];
      fieldList.push({ type: 'string', value: 'meterNum', text: '表具编号' });
      fieldList.push({ type: 'string', value: 'householdNum', text: '户号' });
      fieldList.push({ type: 'string', value: 'companyCode', text: '公司编号' });
      fieldList.push({ type: 'string', value: 'tranBillNum', text: '账单流水号' });
      fieldList.push({ type: 'number', value: 'amount', text: '扣费金额' });
      fieldList.push({ type: 'string', value: 'bizTypeCode', text: '服务编码' });
      fieldList.push({ type: 'string', value: 'detail', text: '缴费明细' });
      fieldList.push({ type: 'date', value: 'billTime', text: '扣费时间' });
      fieldList.push({ type: 'int', value: 'billStatus', text: '扣费状态' });
      fieldList.push({ type: 'int', value: 'billDelayDay', text: '逾期天数' });
      fieldList.push({ type: 'int', value: 'configOrderMainType', text: '业务收费类型' });
      fieldList.push({ type: 'int', value: 'configOrderSubType', text: '业务子类型' });
      fieldList.push({ type: 'string', value: 'billId', text: '业务关联' });
      fieldList.push({ type: 'string', value: 'stepBillId', text: '业务关联' });
      fieldList.push({ type: 'string', value: 'createBy', text: '创建人' });
      fieldList.push({ type: 'date', value: 'createTime', text: '创建日期' });
      fieldList.push({ type: 'string', value: 'updateBy', text: '更新人' });
      fieldList.push({ type: 'date', value: 'updateTime', text: '更新日期' });
      this.superFieldList = fieldList;
    },
    toDetail(record) {
      this.$refs.billDetail.open(record.id);
    },
    toLiquidatedDamages(record) {
      this.$refs.liquidatedDamagesDetail.open(record.id);
    },
    updateConfigOrderSubTypeDisabled() {
      const businessSubTypeItem = this.formConfig.find((item) => item.model === 'configOrderSubType');
      if (businessSubTypeItem) {
        businessSubTypeItem.disabled = false;
      }
    }
  },
  mounted() {
    if (this.householdNum) {
      this.queryParam.householdNum = this.householdNum;
      this.queryParam.createTime_begin = undefined;
      this.queryParam.createTime_end = undefined;
      this.loadData();
      this.getGasMoney();
    }
    this.getHeight();
    this.setConfigAct();
  },
  watch: {
    '$route': {
      handler() {
        if (this.$route.path == '/bizTransactionBill/list') {
          if (this.householdNum) {
            this.queryParam.householdNum = this.householdNum;
            this.queryParam.createTime_begin = undefined;
            this.queryParam.createTime_end = undefined;
            this.loadData();
          }
        }
      },
      immediate: true
    },
    'queryParam.configOrderMainType': {
      handler(newVal) {
        if (newVal) {
          this.getConfigOrderSubTypeList();
        } else {
          const businessSubTypeItem = this.formConfig.find((item) => item.model === 'configOrderSubType');
          if (businessSubTypeItem) {
            businessSubTypeItem.disabled = true;
          }
        }
      },
      deep: true
    }
  }
};
</script>

<style lang="less">
@import '~@assets/less/common.less';
.j-table-force-nowrap {
  .mark-red {
    color: red;
  }
}
.moneyTotal {
  margin-bottom: 20px;
}
.moneyTotal span {
  display: inline-block;
  padding: 0 15px;
  height: 30px;
  background: #e6f7ff;
  border: 1px solid #1890ff;
  color: #1890ff;
  text-align: center;
  line-height: 30px;
  border-radius: 3px;
  margin-right: 5px;
}
</style>

### 关键改动点
1. **添加 `updateConfigOrderSubTypeDisabled` 方法**：该方法用于更新 `configOrderSubType` 字段的 `disabled` 属性。
2. **在 `getConfigOrderSubTypeList` 方法中调用 `updateConfigOrderSubTypeDisabled`**：当获取到业务子类型列表后，启用 `configOrderSubType` 字段。
3. **添加 `watch` 监听 `queryParam.configOrderMainType` 变化**：当 `configOrderMainType` 发生变化时，重新获取业务子类型列表并更新 `configOrderSubType` 的 `disabled` 属性。

通过这些改动，当用户选择业务类型后，业务子类型的 `disabled` 状态将自动变为 `false`。