xny/app/common/model/store/CityArea.php

<?php
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// | Copyright (c) 2016~2024 https://www.crmeb.com All rights reserved.
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namespace app\common\model\store;


use app\common\model\BaseModel;

class CityArea extends BaseModel
{

    public static function tablePk(): ?string
    {
        return 'id';
    }

    public static function tableName(): string
    {
        return 'city_area';
    }

    public function parent()
    {
        return $this->hasOne(self::class,'id','parent_id');
    }

    public function getChildrenAttr()
    {
        return [];
    }

    public function getHasChildrenAttr()
    {
        $count = self::where('parent_id',$this->id)->count();
        return $count ? true : false;
    }

    public function searchParentIdAttr($query,$value)
    {
        $query->where('parent_id', $value);
    }
}