video_server/app/Model/UserLevelRelationModel.php

<?php

/**
 * 用户推广等级关联模型.
 *
 */
declare(strict_types=1);

namespace App\Model;

class UserLevelRelationModel extends BaseModel
{
    /**
     * 表名.
     *
     * @var string
     */
    protected $table = 'user_level_relation';

    public function childUser()
    {
        return $this->hasOne(UserModel::class, 'code', 'uid');
    }
}