Ouzo\Db\RelationFactory::hasOne PHP 메소드

    public static function hasOne($name, $params, $primaryKey)
    {
        self::validateParams($params);
        $localKey = Arrays::getValue($params, 'referencedColumn', $primaryKey);
        $foreignKey = $params['foreignKey'];
        return self::newRelation($name, $localKey, $foreignKey, false, $params);
    }