buildadmin实现多级关联下拉效果

<FormItem :label="t('interior.interiorApply.interior_index_id')" 
  type="remoteSelect"
  v-model="baTable.form.items!.interior_index_id" 
  prop="interior_index_id" 
    :input-attr="{
          pk: 'interior_index.id',
          field: 'uname',
          'remote-url': '/admin/interior.InteriorIndex/index',
          onChange: getServer,
      }" />
<FormItem :label="t('区服')" 
  type="select" 
  v-model="baTable.form.items!.server_id" 
  prop="server_id"
  :data="{ content: state.serverIds }"
  :input-attr="{
      onChange: getRole
  }" />

<FormItem :label="t('角色')" 
  type="select" 
  v-model="baTable.form.items!.role_id" 
  prop="role_id"
  :data="{ content: state.roleIndexs }" />
<script setup lang="ts">
import { inject, reactive, ref, watch } from 'vue'
import { getServerInfo, getRoleInfo } from '/@/api/backend/interior/interiorApply'

const state: {
    roleIndexs: anyObj
    serverIds: anyObj
} = reactive({
    roleIndexs: {},
    serverIds: {},
})

const getServer = () => {
    if (!baTable.form.items!.interior_index_id || parseInt(baTable.form.items!.interior_index_id) <= 0) {
        return
    }
    getServerInfo(baTable.form.items!.interior_index_id).then((res) => {
        state.serverIds = res.data.serverIds;
    })
}
</script>

import createAxios from '/@/utils/axios'

export const url = '/admin/interior.InteriorApply/'

export function getRoleInfo(interior_index_id: string, server_id: string) {
    return createAxios({
        url: url + 'getRoleInfo',
        method: 'get',
        params: {
            interior_index_id: interior_index_id,
            server_id: server_id,
        },
    })
}

export function getServerInfo(interior_index_id: string) {
    return createAxios({
        url: url + 'getServerInfo',
        method: 'get',
        params: {
            interior_index_id: interior_index_id
        },
    })
}

/**
 * 获取区服列表
 */
public function getServerInfo(int $interior_index_id = 0): void
{
    $interiorIndex = InteriorIndex::where('id', $interior_index_id)->find();

    $serverIds = RoleIndex::where(['pid'=>$interiorIndex['pid'], 'gid'=>$interiorIndex['gid'], 'uname'=>$interiorIndex['uname']])->group('server_id')->column('server_name', 'server_id');

    if (!$serverIds) {
        $this->error(__("没有区服数据"));
    }
    $this->success('', [
        'serverIds' => $serverIds
    ]);
}

/**
 * 获取角色列表
 */
public function getRoleInfo(int $interior_index_id = 0, string $server_id = ''): void
{
    $interiorIndex = InteriorIndex::where('id', $interior_index_id)->find();

    $roleIndexs = RoleIndex::where(['pid'=>$interiorIndex['pid'], 'gid'=>$interiorIndex['gid'], 'uname'=>$interiorIndex['uname'], 'server_id'=>$server_id])->column('role_name', 'role_id');

    if (!$roleIndexs) {
        $this->error(__("没有角色数据"));
    }
    $this->success('', [
        'roleIndexs' => $roleIndexs
    ]);
}

<FormItem label="select" type="select" v-model="baTable.form.items!.role_id" :data="{ content: state.roleIndexs }" :key="JSON.stringify(state)" />

// 监听interior_index_id变化时时刷新用户数据
watch(
    () => baTable.form.items!.interior_index_id,
    () => {
        getServer()
    }
)
watch(
    () => baTable.form.items!.server_id,
    () => {
        getRole()
    }
)