xtu_mall/app/admin/model/general/Region.php

<?php
namespace app\admin\model\general;

use think\Model;

class Region extends Model
{
    protected $name = 'region';
    protected $autoWriteTimestamp = true;

    protected function setNameAttr($value)
    {
        return trim((string)$value);
    }

    protected function setCodeAttr($value)
    {
        return strtoupper(trim((string)$value));
    }

    protected function setLangAttr($value)
    {
        return strtolower(trim((string)$value));
    }

    protected function setShopurlAttr($value)
    {
        return trim((string)$value);
    }

    public static function getEnabledList()
    {
        return self::where('is_enabled', 1)->order('sort asc,id asc')->select();
    }

    public static function getDefaultCode()
    {
        $row = self::where('is_default', 1)->find();
        return $row ? $row->code : 'CN';
    }
}