PHP implements Mongodb custom method to generate self-increasing ID_PHP tutorial

php method to implement Mongodb’s custom method to generate auto-increment ID

This article mainly introduces the method of php to implement Mongodb’s custom method to generate auto-increment ID. Mongodb is analyzed with examples. For the implementation skills and corresponding PHP operation methods of self-increasing fields, friends in need can refer to the following

The example in this article describes how PHP implements Mongodb’s custom method to generate self-increasing IDs. Share it with everyone for your reference. The specific analysis is as follows:

The code is as follows:

//First create an automatically growing id collection ids
>db.ids.save({name:"user", id:0});
//You can check whether it is successful
> db.ids.find();
{ "_id" : ObjectId("4c637dbd900f00000000686c"), "name" : "user", "id" : 0 }
//Then each time before adding a new user, increase the ids collection and get the id
>userid = db.ids.findAndModify({update:{$inc:{'id':1}}, query:{"name":"user"}, new:true});
{ "_id" : ObjectId("4c637dbd900f00000000686c"), "name" : "user", "id" : 1 }
//Note: Because findAndModify is a method that completes two operations of update and search, it is atomic and multi-threading will not conflict.
//Then save the corresponding data
>db.user.save({uid:userid.id, username:"kekeles", password:"kekeles", info:"http://www.jb51.net/ "});
//View results
> db.user.find();
{ "_id" : ObjectId("4c637f79900f00000000686d"), "uid" : 1, "username" : "admin", "password" : "admin" }
//This is the mongo shell. If you are using the server-side program java php python, you can encapsulate these operations yourself. You only need to pass a few parameters to return the auto-incremented id, and you can also implement cross-table processing like Oracle's Auto-increment id.

I wrote a piece of php myself and shared it with everyone.

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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(); ?>

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<🎜>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(); ?>

I hope this article will be helpful to everyone’s PHP programming design. http://www.bkjia.com/PHPjc/973137.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/973137.htmlTechArticleHow to generate self-increasing ID in Mongodb customization using PHP. This article mainly introduces the customization method in Mongodb in PHP. The method of generating auto-increment ID, an example analysis of the implementation technology of Mongodb auto-increment field...