fastadmin_tailored/application/common/model/commission/Level.php

<?php

namespace app\common\model\commission;

use think\Model;
class Level extends Model
{
    protected $pk = 'level';

    protected $name = 'shop_commission_level';
    
    protected $autoWriteTimestamp = false;

    protected $type = [
        'commission_rules' => 'json',
        'upgrade_rules' => 'json'
    ];

}