leyu_admin/fastadmin/application/api/model/AboutUsModel.php

<?php
namespace app\api\Model;

use think\Model;

class AboutUsModel extends Model
{
    protected $name = 'about_us';

    public function index()
    {
        $data = $this->alias('a')->find();
        if ($data) {
            return json(['data' => $data, 'msg' => '', 'code' => 200]);
        } else {
            return json(['data' => [], 'msg' => '暂无信息', 'code' => 100]);
        }
    }
}