Mongo Table class file obtains MongoCursor (cursor) implementation method analysis

MongoCursor Object
Cursor class

Mongo
Config.php configuration file
Table.php (mongodb operation database class file)

Config.php configuration file

Copy code The code is as follows:

require_once 'Zend/Exception.php';
class Hrs_Mongo_Config
{
    const VERSION = '1.7.0';
    const DEFAULT_HOST = 'localhost';
    const DEFAULT_PORT = 27017;
    private static $host = self::DEFAULT_HOST ;
    private static $port = self::DEFAULT_PORT ;
    private static $options = array(
            'connect' => true,
            'timeout' => 30,
            //'replicaSet' => '' //If this is given, the master will be determined by using the ismaster database command on the seeds
    );
    public static $conn = '';
    public static $defaultDb = '';
    public static $linkStatus = '';
    public static function set($server = 'mongodb://localhost:27017', $options = array('connect' => true)) {
        if(!$server){
            $url = 'mongodb://'.self::$host.':'.self::$port;
        }
        if(is_array($server)){
            if(isset($server['host'])){
                self::$host = $server['host'];
            }
            if(isset($server['port'])){
                self::$port = $server['port'];
            }
            if(isset($server['user']) && isset($server['pass'])){
                $url = 'mongodb://'.$server['user'].':'.$server['pass'].'@'.self::$host.':'.self::$port;
            }else{
                $url = 'mongodb://'.self::$host.':'.self::$port;
            }
        }
        if(is_array($options)){
            foreach (self::$options as $o_k=>$o_v){
                if(isset($options[$o_k]))
                    self::$options[$o_k] = $o_v;
            }
        }
        try{                        
            self::$conn = new Mongo($url, self::$options);
            self::$linkStatus = 'success';
        }catch (Exception $e){
            self::$linkStatus = 'failed';
        }
        if(isset($server['database'])){
            self::selectDB($server['database']);
        }
    }
    public static function selectDB($database){
        if($database){
            try {
                if(self::$linkStatus=='success')
                    self::$defaultDb = self::$conn->selectDB($database);
                return self::$defaultDb;
            }
                                                                                                                                                                                                             Throw new Zend_Exception('Mongodb database name cannot be empty ');
 }
 }
}



Table.php (mongodb operation database class file)

Copy code

The code is as follows:

require_once 'Hrs/Mongo/Config.php';
abstract class Hrs_Mongo_Table
{
    protected $_db = '';
    protected $_name = '';
    protected $_data = array();
    protected $c_options = array(
            'fsync'=>true,
            'safe'=>true
    );
    protected $u_options = array(
    //'upsert'=>false,
            'multiple'=>true,
            'fsync'=>true,
            'safe'=>true
    );
    /*
     protected $r_options = array(
     );*/
    protected $d_options = array(
            'fsync'=>true,
            'justOne'=>false,
            'safe'=>true
    );
    protected function _setAdapter($database=''){
        if(!$database)
            throw new Zend_Exception('Mongodb数据库名称不能为空');
        Hrs_Mongo_Config::selectDB($database);
    }
    public function __construct() {
        if(Hrs_Mongo_Config::$conn instanceof Mongo){
            $name = $this->_name;
            $defDb = Hrs_Mongo_Config::$defaultDb;
            $this->_db = $defDb->$name;
        }else{
            throw new Zend_Exception('Mongodb服务器连接失败');
        }
    }
    public function insert($data){
        if(!$this->testLink()) return false;
        $ret = $this->_db->insert($data, $this->c_options);
        return $ret;
    }
    public function update($data, $where){
        if(!$this->testLink()) return false;
        return $this->_db->update($where, $data, $this->u_options);
    }
    public function find($where=array(),$limit=0){
        if($this->testLink()) {
            if($limit>0){
                $this->_data = $where ? $this->_db->find($where)->limit($limit)->snapshot() : $this->_db->find()->limit($limit)->snapshot();
            }else{
                $this->_data = $where ? $this->_db->find($where)->limit($limit)->snapshot() : $this->_db->find()->limit($limit)->snapshot();
            }
        }
        return $this;
    }
    //find cursor
    /*
     * 获取游标对象
     */
    public function look($where=array(),$fields=array()){
        if($this->testLink()) {
            if($fields){
                return $where ? $this->_db->find($where,$fields): $this->_db->find()->fields($fields);
            }else{
                return $where ? $this->_db->find($where) : $this->_db->find();
            }
        }
        return false;
    }
    public function delete($where){
        if(!$this->testLink()) return false;
        return $this->_db->remove($where, $this->d_options);
    }
    public function dropMe(){
        if(!$this->testLink()) return false;
        return $this->_db->drop();
    }
    public function __toString(){
        return $this->_data;
    }
    public function toArray(){
        $tmpData = array();
        foreach($this->_data as $id=>$row){
            $one_row = array();
            foreach($row as $key=>$col){
                $one_row[$key] = $col;
            }
            $one_row['_id'] = $id;
            $tmpData[] = $one_row;
        }
        return $tmpData;
    }
    protected function testLink(){
        return Hrs_Mongo_Config::$linkStatus == 'success' ? true :false;
    }
}

要点注意！！！
第一种方法

复制代码代码如下:

    //find cursor
    /*
     * 获取游标对象
     */
    public function look($where=array(),$fields=array()){
        if($this->testLink()) {
            if($fields){
                return $where ? $this->_db->find($where,$fields): $this->_db->find()->fields($fields);
            }else{
                return $where ? $this->_db->find($where) : $this->_db->find();
            }
        }
        return false;
    }

第二种方法

复制代码代码如下:

    public function find($where=array(),$field=array()){
        if($this->testLink()) {
            $this->_data = $this->_db->find($where,$field)->sort(array("_id" => -1));
        }
        return $this;
    }

复制代码代码如下:

    /*
     * 获取游标对象
     */
    public function getCursor(){
     return $this->_data;
    }

The second requirement is that what you get from find is not an array
find($where)->getCursor(); but a MongoCursor Object

Note
find() returns the current object
toArray() method converts the current object into an array
getCursor() method converts the current object Convert to MongoCursor Object (cursor object)

Mongo Table class file obtains MongoCursor (cursor) implementation method analysis_PHP tutorial