/** * 构造查询 * * @param Mongo $mongo MongoDB连接 * @param string $db 数据库 * @param string $collection 集合 */ function __construct(RMongo $mongo, $db, $collection) { $this->_dbName = $db; $this->_collectionName = $collection; $this->_db = $mongo->selectDB($this->_dbName); $this->_collection = $mongo->selectCollection($this->_dbName, $this->_collectionName); }