<?php

class MongoModel extends MongoDb{

    private $_instance;

    public function __construct(){
        $this->db = MongoDb::getInstance();
    }

    public static function getInstance(){
        if(!(self::$_instance instanceof self)){
            self::$_instance = new sefl();
        }
        return self::$_instance;
    }

    /**
     * 根据条件获取列表
     * @param  array   $query  [description]
     * @param  array   $fields [description]
     * @param  array   $sort   [description]
     * @param  integer $limit  [description]
     * @param  integer $skip   [description]
     * @return [type]          [description]
     */
    public function getList($query=array(),$fields=array(),$sort=array(),$limit=0,$skip=0){
        return $this->db->select($this->table, $query, $fields, $sort, $limit, $skip);
    }

    /**
     * 根据条件，获取单条数据
     * @param  array  $query  [description]
     * @param  array  $fields [description]
     * @return [type]         [description]
     */
    public function get($query=array(), $fields=array()){
        return $this->db->fetchRow($this->table, $query, $fields);
    }

    /**
     * 根据条件获取数量
     * @param  array   $query [description]
     * @param  integer $limit [description]
     * @param  integer $skip  [description]
     * @return [type]         [description]
     */
    public function count($query=array(),$limit=0,$skip=0){
        return $this->db->count($this->table, $query,$limit, $skip);
    }

    /**
     * [add description]
     */
    public function add($data){
        return $this->db->insert($this->table, $data);
    }

    public function update($data, $query){
        return $this->db->update($this->table, $data, $query);
    }

}