screen/application/common/model/UserTax.php

<?php

namespace app\common\model;

use think\Model;


class UserTax extends Model
{
    protected $autoWriteTimestamp=true;
    protected $updateTime=null;
    protected $type=[
        'tax'=>'json',
    ];

    public static function fromOrder(Orders $orders){
        if($orders['tax']){
            $has=self::where('user_id',$orders['user_id'])->where('tax',json_encode($orders['tax'],JSON_UNESCAPED_UNICODE))->find();
            if(!$has) {
                self::create([
                    'user_id' => $orders['user_id'],
                    'tax' => $orders['tax'],
                    'order_id'=>$orders->id,
                ]);
            }
        }
    }

    public function orders(){
        return $this->belongsTo(Orders::class,'order_id');
    }

    protected static function init()
    {
        self::afterWrite(function (self $tax){
            if(!empty($tax['is_default'])){
                self::where('user_id',$tax['user_id'])->where('id','<>',$tax['id'])->update(['is_default'=>0]);
            }
        });
    }
}