安装方法：
1.将mongodb.php 放到config目录2.将Mongo_db.php放到library目录
使用方法：
$this->mongo_db->where_gte('age', 18)->where(array('country' => 'UK', 'can_drink' => TRUE))->get('people');
代码：
config/mongodb.php
libraries/Mongo_db.php
CI =& get_instance(); $this->connection_string(); $this->connect(); } /** * -------------------------------------------------------------------------------- * Switch_db * -------------------------------------------------------------------------------- * * Switch from default database to a different db */ public function switch_db($database = '') { if (empty($database)) { show_error("To switch MongoDB databases, a new database name must be specified", 500); } $this->dbname = $database; try { $this->db = $this->connection->{ $this->dbname}; return (TRUE); } catch (Exception $e) { show_error("Unable to switch Mongo Databases: { $e->getMessage()}", 500); } } /** * -------------------------------------------------------------------------------- * Drop_db * -------------------------------------------------------------------------------- * * Drop a Mongo database * @usage: $this->mongo_db->drop_db("foobar"); */ public function drop_db($database = '') { if (empty($database)) { show_error('Failed to drop MongoDB database because name is empty', 500); } else { try { $this->connection->{ $database}->drop(); return (TRUE); } catch (Exception $e) { show_error("Unable to drop Mongo database `{ $database}`: { $e->getMessage()}", 500); } } } /** * -------------------------------------------------------------------------------- * Drop_collection * -------------------------------------------------------------------------------- * * Drop a Mongo collection * @usage: $this->mongo_db->drop_collection('foo', 'bar'); */ public function drop_collection($db = "", $col = "") { if (empty($db)) { show_error('Failed to drop MongoDB collection because database name is empty', 500); } if (empty($col)) { show_error('Failed to drop MongoDB collection because collection name is empty', 500); } else { try { $this->connection->{ $db}->{ $col}->drop(); return TRUE; } catch (Exception $e) { show_error("Unable to drop Mongo collection `{ $col}`: { $e->getMessage()}", 500); } } return($this); } /** * -------------------------------------------------------------------------------- * SELECT FIELDS * -------------------------------------------------------------------------------- * * Determine which fields to include OR which to exclude during the query process. * Currently, including and excluding at the same time is not available, so the * $includes array will take precedence over the $excludes array. If you want to * only choose fields to exclude, leave $includes an empty array(). * * @usage: $this->mongo_db->select(array('foo', 'bar'))->get('foobar'); */ public function select($includes = array(), $excludes = array()) { if ( ! is_array($includes)) { $includes = array(); } if ( ! is_array($excludes)) { $excludes = array(); } if ( ! empty($includes)) { foreach ($includes as $col) { $this->selects[$col] = 1; } } else { foreach ($excludes as $col) { $this->selects[$col] = 0; } } return ($this); } /** * -------------------------------------------------------------------------------- * WHERE PARAMETERS * -------------------------------------------------------------------------------- * * Get the documents based on these search parameters. The $wheres array should * be an associative array with the field as the key and the value as the search * criteria. * * @usage : $this->mongo_db->where(array('foo' => 'bar'))->get('foobar'); */ public function where($wheres = array()) { foreach ($wheres as $wh => $val) { $this->wheres[$wh] = $val; } return ($this); } /** * -------------------------------------------------------------------------------- * OR_WHERE PARAMETERS * -------------------------------------------------------------------------------- * * Get the documents where the value of a $field may be something else * * @usage : $this->mongo_db->or_where(array( array('foo'=>'bar', 'bar'=>'foo' ))->get('foobar'); */ public function or_where($wheres = array()) { if (count($wheres) > 0) { if ( ! isset($this->wheres['$or']) || ! is_array($this->wheres['$or'])) { $this->wheres['$or'] = array(); } foreach ($wheres as $wh => $val) { $this->wheres['$or'][] = array($wh=>$val); } } return ($this); } /** * -------------------------------------------------------------------------------- * WHERE_IN PARAMETERS * -------------------------------------------------------------------------------- * * Get the documents where the value of a $field is in a given $in array(). * * @usage : $this->mongo_db->where_in('foo', array('bar', 'zoo', 'blah'))->get('foobar'); */ public function where_in($field = "", $in = array()) { $this->_where_init($field); $this->wheres[$field]['$in'] = $in; return ($this); } /** * -------------------------------------------------------------------------------- * WHERE_IN_ALL PARAMETERS * -------------------------------------------------------------------------------- * * Get the documents where the value of a $field is in all of a given $in array(). * * @usage : $this->mongo_db->where_in('foo', array('bar', 'zoo', 'blah'))->get('foobar'); */ public function where_in_all($field = "", $in = array()) { $this->_where_init($field); $this->wheres[$field]['$all'] = $in; return ($this); } /** * -------------------------------------------------------------------------------- * WHERE_NOT_IN PARAMETERS * -------------------------------------------------------------------------------- * * Get the documents where the value of a $field is not in a given $in array(). * * @usage : $this->mongo_db->where_not_in('foo', array('bar', 'zoo', 'blah'))->get('foobar'); */ public function where_not_in($field = "", $in = array()) { $this->_where_init($field); $this->wheres[$field]['$nin'] = $in; return ($this); } /** * -------------------------------------------------------------------------------- * WHERE GREATER THAN PARAMETERS * -------------------------------------------------------------------------------- * * Get the documents where the value of a $field is greater than $x * * @usage : $this->mongo_db->where_gt('foo', 20); */ public function where_gt($field = "", $x) { $this->_where_init($field); $this->wheres[$field]['$gt'] = $x; return ($this); } /** * -------------------------------------------------------------------------------- * WHERE GREATER THAN OR EQUAL TO PARAMETERS * -------------------------------------------------------------------------------- * * Get the documents where the value of a $field is greater than or equal to $x * * @usage : $this->mongo_db->where_gte('foo', 20); */ public function where_gte($field = "", $x) { $this->_where_init($field); $this->wheres[$field]['$gte'] = $x; return($this); } /** * -------------------------------------------------------------------------------- * WHERE LESS THAN PARAMETERS * -------------------------------------------------------------------------------- * * Get the documents where the value of a $field is less than $x * * @usage : $this->mongo_db->where_lt('foo', 20); */ public function where_lt($field = "", $x) { $this->_where_init($field); $this->wheres[$field]['$lt'] = $x; return($this); } /** * -------------------------------------------------------------------------------- * WHERE LESS THAN OR EQUAL TO PARAMETERS * -------------------------------------------------------------------------------- * * Get the documents where the value of a $field is less than or equal to $x * * @usage : $this->mongo_db->where_lte('foo', 20); */ public function where_lte($field = "", $x) { $this->_where_init($field); $this->wheres[$field]['$lte'] = $x; return ($this); } /** * -------------------------------------------------------------------------------- * WHERE BETWEEN PARAMETERS * -------------------------------------------------------------------------------- * * Get the documents where the value of a $field is between $x and $y * * @usage : $this->mongo_db->where_between('foo', 20, 30); */ public function where_between($field = "", $x, $y) { $this->_where_init($field); $this->wheres[$field]['$gte'] = $x; $this->wheres[$field]['$lte'] = $y; return ($this); } /** * -------------------------------------------------------------------------------- * WHERE BETWEEN AND NOT EQUAL TO PARAMETERS * -------------------------------------------------------------------------------- * * Get the documents where the value of a $field is between but not equal to $x and $y * * @usage : $this->mongo_db->where_between_ne('foo', 20, 30); */ public function where_between_ne($field = "", $x, $y) { $this->_where_init($field); $this->wheres[$field]['$gt'] = $x; $this->wheres[$field]['$lt'] = $y; return ($this); } /** * -------------------------------------------------------------------------------- * WHERE NOT EQUAL TO PARAMETERS * -------------------------------------------------------------------------------- * * Get the documents where the value of a $field is not equal to $x * * @usage : $this->mongo_db->where_not_equal('foo', 1)->get('foobar'); */ public function where_ne($field = '', $x) { $this->_where_init($field); $this->wheres[$field]['$ne'] = $x; return ($this); } /** * -------------------------------------------------------------------------------- * WHERE NOT EQUAL TO PARAMETERS * -------------------------------------------------------------------------------- * * Get the documents nearest to an array of coordinates (your collection must have a geospatial index) * * @usage : $this->mongo_db->where_near('foo', array('50','50'))->get('foobar'); */ function where_near($field = '', $co = array()) { $this->__where_init($field); $this->where[$what]['$near'] = $co; return ($this); } /** * -------------------------------------------------------------------------------- * LIKE PARAMETERS * -------------------------------------------------------------------------------- * * Get the documents where the (string) value of a $field is like a value. The defaults * allow for a case-insensitive search. * * @param $flags * Allows for the typical regular expression flags: * i = case insensitive * m = multiline * x = can contain comments * l = locale * s = dotall, "." matches everything, including newlines * u = match unicode * * @param $enable_start_wildcard * If set to anything other than TRUE, a starting line character "^" will be prepended * to the search value, representing only searching for a value at the start of * a new line. * * @param $enable_end_wildcard * If set to anything other than TRUE, an ending line character "$" will be appended * to the search value, representing only searching for a value at the end of * a line. * * @usage : $this->mongo_db->like('foo', 'bar', 'im', FALSE, TRUE); */ public function like($field = "", $value = "", $flags = "i", $enable_start_wildcard = TRUE, $enable_end_wildcard = TRUE) { $field = (string) trim($field); $this->where_init($field); $value = (string) trim($value); $value = quotemeta($value); if ($enable_start_wildcard !== TRUE) { $value = "^" . $value; } if ($enable_end_wildcard !== TRUE) { $value .= "$"; } $regex = "/$value/$flags"; $this->wheres[$field] = new MongoRegex($regex); return ($this); } /** * -------------------------------------------------------------------------------- * ORDER BY PARAMETERS * -------------------------------------------------------------------------------- * * Sort the documents based on the parameters passed. To set values to descending order, * you must pass values of either -1, FALSE, 'desc', or 'DESC', else they will be * set to 1 (ASC). * * @usage : $this->mongo_db->where_between('foo', 20, 30); */ public function order_by($fields = array()) { foreach ($fields as $col => $val) { if ($val == -1 || $val === FALSE || strtolower($val) == 'desc') { $this->sorts[$col] = -1; } else { $this->sorts[$col] = 1; } } return ($this); } /** * -------------------------------------------------------------------------------- * LIMIT DOCUMENTS * -------------------------------------------------------------------------------- * * Limit the result set to $x number of documents * * @usage : $this->mongo_db->limit($x); */ public function limit($x = 99999) { if ($x !== NULL && is_numeric($x) && $x >= 1) { $this->limit = (int) $x; } return ($this); } /** * -------------------------------------------------------------------------------- * OFFSET DOCUMENTS * -------------------------------------------------------------------------------- * * Offset the result set to skip $x number of documents * * @usage : $this->mongo_db->offset($x); */ public function offset($x = 0) { if ($x !== NULL && is_numeric($x) && $x >= 1) { $this->offset = (int) $x; } return ($this); } /** * -------------------------------------------------------------------------------- * GET_WHERE * -------------------------------------------------------------------------------- * * Get the documents based upon the passed parameters * * @usage : $this->mongo_db->get_where('foo', array('bar' => 'something')); */ public function get_where($collection = "", $where = array()) { return ($this->where($where)->get($collection)); } /** * -------------------------------------------------------------------------------- * GET * -------------------------------------------------------------------------------- * * Get the documents based upon the passed parameters * * @usage : $this->mongo_db->get('foo', array('bar' => 'something')); */ public function get($collection = "") { if (empty($collection)) { show_error("In order to retreive documents from MongoDB, a collection name must be passed", 500); } $results = array(); $documents = $this->db->{ $collection}->find($this->wheres, $this->selects)->limit((int) $this->limit)->skip((int) $this->offset)->sort($this->sorts); // Clear $this->_clear(); $returns = array(); foreach ($documents as $doc) { $returns[] = $doc; } if ($this->CI->config->item('mongo_return') == 'object') { return (object)$returns; } else { return $returns; } } /** * -------------------------------------------------------------------------------- * COUNT * -------------------------------------------------------------------------------- * * Count the documents based upon the passed parameters * * @usage : $this->mongo_db->get('foo'); */ public function count($collection = "") { if (empty($collection)) { show_error("In order to retreive a count of documents from MongoDB, a collection name must be passed", 500); } $count = $this->db->{ $collection}->find($this->wheres)->limit((int) $this->limit)->skip((int) $this->offset)->count(); $this->_clear(); return ($count); } /** * -------------------------------------------------------------------------------- * INSERT * -------------------------------------------------------------------------------- * * Insert a new document into the passed collection * * @usage : $this->mongo_db->insert('foo', $data = array()); */ public function insert($collection = "", $insert = array()) { if (empty($collection)) { show_error("No Mongo collection selected to insert into", 500); } if (count($insert) == 0 || !is_array($insert)) { show_error("Nothing to insert into Mongo collection or insert is not an array", 500); } try { $this->db->{ $collection}->insert($insert, array($this->query_safety => TRUE)); if (isset($insert['_id'])) { return ($insert['_id']); } else { return (FALSE); } } catch (MongoCursorException $e) { show_error("Insert of data into MongoDB failed: { $e->getMessage()}", 500); } } /** * -------------------------------------------------------------------------------- * UPDATE * -------------------------------------------------------------------------------- * * Updates a single document * * @usage: $this->mongo_db->update('foo', $data = array()); */ public function update($collection = "", $data = array(), $options = array()) { if (empty($collection)) { show_error("No Mongo collection selected to update", 500); } if (count($data) == 0 || ! is_array($data)) { show_error("Nothing to update in Mongo collection or update is not an array", 500); } try { $options = array_merge($options, array($this->query_safety => TRUE, 'multiple' => FALSE)); $this->db->{ $collection}->update($this->wheres, array('$set' => $data), $options); $this->_clear(); return (TRUE); } catch (MongoCursorException $e) { show_error("Update of data into MongoDB failed: { $e->getMessage()}", 500); } } /** * -------------------------------------------------------------------------------- * UPDATE_ALL * -------------------------------------------------------------------------------- * * Updates a collection of documents * * @usage: $this->mongo_db->update_all('foo', $data = array()); */ public function update_all($collection = "", $data = array()) { if (empty($collection)) { show_error("No Mongo collection selected to update", 500); } if (count($data) == 0 || ! is_array($data)) { show_error("Nothing to update in Mongo collection or update is not an array", 500); } try { $this->db->{ $collection}->update($this->wheres, array('$set' => $data), array($this->query_safety => TRUE, 'multiple' => TRUE)); $this->_clear(); return (TRUE); } catch (MongoCursorException $e) { show_error("Update of data into MongoDB failed: { $e->getMessage()}", 500); } } /** * -------------------------------------------------------------------------------- * DELETE * -------------------------------------------------------------------------------- * * delete document from the passed collection based upon certain criteria * * @usage : $this->mongo_db->delete('foo', $data = array()); */ public function delete($collection = "") { if (empty($collection)) { show_error("No Mongo collection selected to delete from", 500); } try { $this->db->{ $collection}->remove($this->wheres, array($this->query_safety => TRUE, 'justOne' => TRUE)); $this->_clear(); return (TRUE); } catch (MongoCursorException $e) { show_error("Delete of data into MongoDB failed: { $e->getMessage()}", 500); } } /** * -------------------------------------------------------------------------------- * DELETE_ALL * -------------------------------------------------------------------------------- * * Delete all documents from the passed collection based upon certain criteria * * @usage : $this->mongo_db->delete_all('foo', $data = array()); */ public function delete_all($collection = "") { if (empty($collection)) { show_error("No Mongo collection selected to delete from", 500); } try { $this->db->{ $collection}->remove($this->wheres, array($this->query_safety => TRUE, 'justOne' => FALSE)); $this->_clear(); return (TRUE); } catch (MongoCursorException $e) { show_error("Delete of data into MongoDB failed: { $e->getMessage()}", 500); } } /** * -------------------------------------------------------------------------------- * COMMAND * -------------------------------------------------------------------------------- * * Runs a MongoDB command (such as GeoNear). See the MongoDB documentation for more usage scenarios: * http://dochub.mongodb.org/core/commands * * @usage : $this->mongo_db->command(array('geoNear'=>'buildings', 'near'=>array(53.228482, -0.547847), 'num' => 10, 'nearSphere'=>true)); */ public function command($query = array()) { try { $run = $this->db->command($query); return $run; } catch (MongoCursorException $e) { show_error("MongoDB command failed to execute: { $e->getMessage()}", 500); } } /** * -------------------------------------------------------------------------------- * ADD_INDEX * -------------------------------------------------------------------------------- * * Ensure an index of the keys in a collection with optional parameters. To set values to descending order, * you must pass values of either -1, FALSE, 'desc', or 'DESC', else they will be * set to 1 (ASC). * * @usage : $this->mongo_db->add_index($collection, array('first_name' => 'ASC', 'last_name' => -1), array('unique' => TRUE)); */ public function add_index($collection = "", $keys = array(), $options = array()) { if (empty($collection)) { show_error("No Mongo collection specified to add index to", 500); } if (empty($keys) || ! is_array($keys)) { show_error("Index could not be created to MongoDB Collection because no keys were specified", 500); } foreach ($keys as $col => $val) { if($val == -1 || $val === FALSE || strtolower($val) == 'desc') { $keys[$col] = -1; } else { $keys[$col] = 1; } } if ($this->db->{ $collection}->ensureIndex($keys, $options) == TRUE) { $this->_clear(); return ($this); } else { show_error("An error occured when trying to add an index to MongoDB Collection", 500); } } /** * -------------------------------------------------------------------------------- * REMOVE_INDEX * -------------------------------------------------------------------------------- * * Remove an index of the keys in a collection. To set values to descending order, * you must pass values of either -1, FALSE, 'desc', or 'DESC', else they will be * set to 1 (ASC). * * @usage : $this->mongo_db->remove_index($collection, array('first_name' => 'ASC', 'last_name' => -1)); */ public function remove_index($collection = "", $keys = array()) { if (empty($collection)) { show_error("No Mongo collection specified to remove index from", 500); } if (empty($keys) || ! is_array($keys)) { show_error("Index could not be removed from MongoDB Collection because no keys were specified", 500); } if ($this->db->{ $collection}->deleteIndex($keys, $options) == TRUE) { $this->_clear(); return ($this); } else { show_error("An error occured when trying to remove an index from MongoDB Collection", 500); } } /** * -------------------------------------------------------------------------------- * REMOVE_ALL_INDEXES * -------------------------------------------------------------------------------- * * Remove all indexes from a collection. * * @usage : $this->mongo_db->remove_all_index($collection); */ public function remove_all_indexes($collection = "") { if (empty($collection)) { show_error("No Mongo collection specified to remove all indexes from", 500); } $this->db->{ $collection}->deleteIndexes(); $this->_clear(); return ($this); } /** * -------------------------------------------------------------------------------- * LIST_INDEXES * -------------------------------------------------------------------------------- * * Lists all indexes in a collection. * * @usage : $this->mongo_db->list_indexes($collection); */ public function list_indexes($collection = "") { if (empty($collection)) { show_error("No Mongo collection specified to remove all indexes from", 500); } return ($this->db->{ $collection}->getIndexInfo()); } /** * -------------------------------------------------------------------------------- * CONNECT TO MONGODB * -------------------------------------------------------------------------------- * * Establish a connection to MongoDB using the connection string generated in * the connection_string() method. If 'mongo_persist_key' was set to true in the * config file, establish a persistent connection. We allow for only the 'persist' * option to be set because we want to establish a connection immediately. */ private function connect() { $options = array(); if ($this->persist === TRUE) { $options['persist'] = isset($this->persist_key) && !empty($this->persist_key) ? $this->persist_key : 'ci_mongo_persist'; } try { $this->connection = new Mongo($this->connection_string, $options); $this->db = $this->connection->{ $this->dbname}; return ($this); } catch (MongoConnectionException $e) { if($this->CI->config->item('mongo_supress_connect_error')) { show_error("Unable to connect to MongoDB", 500); } else { show_error("Unable to connect to MongoDB: { $e->getMessage()}", 500); } } } /** * -------------------------------------------------------------------------------- * BUILD CONNECTION STRING * -------------------------------------------------------------------------------- * * Build the connection string from the config file. */ private function connection_string() { $this->CI->config->load($this->config_file); $this->host = trim($this->CI->config->item('mongo_host')); $this->port = trim($this->CI->config->item('mongo_port')); $this->user = trim($this->CI->config->item('mongo_user')); $this->pass = trim($this->CI->config->item('mongo_pass')); $this->dbname = trim($this->CI->config->item('mongo_db')); $this->persist = trim($this->CI->config->item('mongo_persist')); $this->persist_key = trim($this->CI->config->item('mongo_persist_key')); $this->query_safety = trim($this->CI->config->item('mongo_query_safety')); $dbhostflag = (bool)$this->CI->config->item('host_db_flag'); $connection_string = "mongodb://"; if (empty($this->host)) { show_error("The Host must be set to connect to MongoDB", 500); } if (empty($this->dbname)) { show_error("The Database must be set to connect to MongoDB", 500); } if ( ! empty($this->user) && ! empty($this->pass)) { $connection_string .= "{ $this->user}:{ $this->pass}@"; } if (isset($this->port) && ! empty($this->port)) { $connection_string .= "{ $this->host}:{ $this->port}"; } else { $connection_string .= "{ $this->host}"; } if ($dbhostflag === TRUE) { $this->connection_string = trim($connection_string) . '/' . $this->dbname; } else { $this->connection_string = trim($connection_string); } } /** * -------------------------------------------------------------------------------- * _clear * -------------------------------------------------------------------------------- * * Resets the class variables to default settings */ private function _clear() { $this->selects = array(); $this->wheres = array(); $this->limit = 999999; $this->offset = 0; $this->sorts = array(); } /** * -------------------------------------------------------------------------------- * WHERE INITIALIZER * -------------------------------------------------------------------------------- * * Prepares parameters for insertion in $wheres array(). */ private function _where_init($param) { if ( ! isset($this->wheres[$param])) { $this->wheres[ $param ] = array(); } } }// EOF