与yiimongodbsuite在mongodb中的前5条记录

How to get the top 5 document in mongodb with yiimongodbsuite.I already used this

    $cursor = $model::model()->getCollection()->find($criteria->getConditions());
    if($criteria->getSort() !== null)
        $cursor->sort($criteria->getSort());
    if($criteria->getOffset() !== null)
        $cursor->skip($criteria->getOffset());
    if($criteria->getSelect())
        $cursor->fields($criteria->getSelect(true));
    $cursor->limit(5);
    return location::$model->populateRecord($cursor->getNext());

but I am getting only one document.