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Home Backend Development PHP Tutorial php實現(xiàn)Mongodb自定義方式生成自增ID的方法_PHP

php實現(xiàn)Mongodb自定義方式生成自增ID的方法_PHP

May 31, 2016 am 11:45 AM
mongodb php Way generate customize

本文實例講述了php實現(xiàn)Mongodb自定義方式生成自增ID的方法。分享給大家供大家參考。具體分析如下:

代碼如下:

//首先創(chuàng)建一個自動增長id集合 ids
>db.ids.save({name:"user", id:0});
//可以查看一下是否成功
> db.ids.find();
{ "_id" : ObjectId("4c637dbd900f00000000686c"), "name" : "user", "id" : 0 }
//然后每次添加新用戶之前自增一下 ids集合 獲得id
>userid = db.ids.findAndModify({update:{$inc:{'id':1}}, query:{"name":"user"}, new:true});
{ "_id" : ObjectId("4c637dbd900f00000000686c"), "name" : "user", "id" : 1 }
//注:因為findAndModify是一個方法完成更新查找兩個操作,所以具有原子性,多線程不會沖突。
//然后保存相應(yīng)的數(shù)據(jù)
>db.user.save({uid:userid.id, username:"kekeles", password:"kekeles", info:"http://www.jb51.net/ "});
//查看結(jié)果
> db.user.find();
{ "_id" : ObjectId("4c637f79900f00000000686d"), "uid" : 1, "username" : "admin", "password" : "admin" }
//這是mongo的shell,如果用的是服務(wù)器端程序java php python,可以自己對這些操作封裝一下,只用傳幾個參數(shù)就可以返回自增的id,還可以實現(xiàn)像Oracle的跨表的自增id。

自己寫了一段php的,拿出來給大家分享。

<&#63;php
function mid($name, $db){
$update = array('$inc'=>array("id"=>1));
$query = array('name'=>$name);
$command = array(
'findandmodify'=>'ids', 'update'=>$update,
'query'=>$query, 'new'=>true, 'upsert'=>true
);
$id = $db->command($command);
return $id['value']['id'];
}
$conn = new Mongo();
$db = $conn->idtest;
$id = mid('user', $db);
$db->user->save(array(
'uid'=>$id, 
'username'=>'kekeles', 
'password'=>'kekeles',
 'info'=>'http://www.jb51.net/ '
));
$conn->close();
&#63;>

希望本文所述對大家的php程序設(shè)計有所幫助。

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