MongoCursor Object

遊標類

Mongo

Config.php配置檔案

Table.php（mongodb操作資料庫類檔案）

Config.php配置檔案

<?php
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;
            }
            catch(InvalidArgumentException $e) {
                throw new Zend_Exception('Mongodb資料庫名稱不正確');
            }
        }else{
            throw new Zend_Exception('Mongodb資料庫名稱不能為空');
        }
    }
}
 

Table.php（mongodb操作資料庫類檔案）

<?php

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資料庫名稱不能為空');

        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伺服器連線失敗');
        }
    }

    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
    /*
     * 獲取遊標物件
     */
    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;
    }
}
 

要點注意！！！

第一種方法

    //find cursor
    /*
     * 獲取遊標物件
     */
    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;
    }
 

第二種方法

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

    /*
     * 獲取遊標物件
     */
    public function getCursor(){
    	return $this->_data;
    }

第二種需要的是find得到的不是陣列

find($where)->getCursor();是MongoCursor Object

注意注意
find()返回的是當前物件

toArray()方法是把當前物件轉換為陣列

getCursor()方法是把當前物件轉換為MongoCursor Object（遊標物件）