screen/application/admin/model/MobileOrderAdmin.php

<?php

namespace app\admin\model;

use think\Model;

/**
 * 配置模型
 */
class MobileOrderAdmin extends Model
{
    public static function add(\app\common\model\MobileOrder $mobileOrder,$when,$admin_id){
        if($when){
            self::create([
                'mobile_order_id'=>$mobileOrder['id'],
                'admin_id'=>$admin_id,
            ]);
        }
    }

    public function admin(){
        return $this->belongsTo(Admin::class,'admin_id','id',[])->setEagerlyType(0);
    }
}