升级PHP7操作MongoDB-,学习笔记 - Powered by Discuz! Archiver

admin 发表于 2019-3-19 14:24:22

升级PHP7操作MongoDB

使用 PHP+MongoDB 的用户很多，因为 MongoDB 对非结构化数据的存储很方便。在 PHP5 及以前，官方提供了两个扩展，Mongo 和 MongoDB，其中 Mongo 是对以 MongoClient 等几个核心类为基础的类群进行操作，封装得很方便，所以基本上都会选择 Mongo 扩展。详情请见官方手册：http://php.net/manual/zh/book...但是随着 PHP5 升级到 PHP7，官方不再支持 Mongo 扩展，只支持 MongoDB，而 PHP7 的性能提升巨大，让人无法割舍，所以怎么把 Mongo 替换成 MongoDB 成为了一个亟待解决的问题。MongoDB 引入了命名空间，但是功能封装非常差，如果非要用原生的扩展，几乎意味着写原生的 Mongo 语句。这种想法很违背 ORM 简化 DB IO 操作带来的语法问题而专注逻辑优化的思路。详情也可参见官方手册：http://php.net/manual/zh/set....在这种情况之下，MongoDB 官方忍不住了，为了方便使用，增加市场占有率，推出了基于MongoDB 扩展的库：https://github.com/mongodb/mo...该库的详细文档见：https://docs.mongodb.com/php-...MongoDB 驱动如果使用原驱动的话，大致语法如下：<?php

use MongoDB\Driver\Manager;
use MongoDB\Driver\BulkWrite;
use MongoDB\Driver\WriteConcern;
use MongoDB\Driver\Query;
use MongoDB\Driver\Command;

class MongoDb {

protected $mongodb;
protected $database;
protected $collection;
protected $bulk;
protected $writeConcern;
protected $defaultConfig
   = [
         'hostname' => 'localhost',
         'port' => '27017',
         'username' => '',
         'password' => '',
         'database' => 'test'
   ];

public function __construct($config) {
   $config = array_merge($this->defaultConfig, $config);
   $mongoServer = "mongodb://";
   if ($config['username']) {
         $mongoServer .= $config['username'] . ':' . $config['password'] . '@';
   }
   $mongoServer .= $config['hostname'];
   if ($config['port']) {
         $mongoServer .= ':' . $config['port'];
   }
   $mongoServer .= '/' . $config['database'];

   $this->mongodb = new Manager($mongoServer);
   $this->database = $config['database'];
   $this->collection = $config['collection'];
   $this->bulk = new BulkWrite();
   $this->writeConcern = new WriteConcern(WriteConcern::MAJORITY, 100);
}

public function query($where = [], $option = []) {
   $query = new Query($where, $option);
   $result = $this->mongodb->executeQuery("$this->database.$this->collection", $query);

   return json_encode($result);
}

public function count($where = []) {
   $command = new Command(['count' => $this->collection, 'query' => $where]);
   $result = $this->mongodb->executeCommand($this->database, $command);
   $res = $result->toArray();
   $count = 0;
   if ($res) {
         $count = $res->n;
   }

   return $count;
}

public function update($where = [], $update = [], $upsert = false) {
   $this->bulk->update($where, ['$set' => $update], ['multi' => true, 'upsert' => $upsert]);
   $result = $this->mongodb->executeBulkWrite("$this->database.$this->collection", $this->bulk, $this->writeConcern);

   return $result->getModifiedCount();
}

public function insert($data = []) {
   $this->bulk->insert($data);
   $result = $this->mongodb->executeBulkWrite("$this->database.$this->collection", $this->bulk, $this->writeConcern);

   return $result->getInsertedCount();
}

public function delete($where = [], $limit = 1) {
   $this->bulk->delete($where, ['limit' => $limit]);
   $result = $this->mongodb->executeBulkWrite("$this->database.$this->collection", $this->bulk, $this->writeConcern);

   return $result->getDeletedCount();
}
}这样的语法和之前差异太大，改动不方便，换 PHP MongoDB 库MongoDB 库1.连接
[*]原
new MongoClient();
[*]新
new MongoDB\Client();2.新增
[*]原
$collention->insert($array, $options);
[*]新
$resultOne = $collention->insertOne($array, $options);//单
$lastId = $resultOne->getInsertedId();
$resultMany = $collention->insertMany($array, $options);//多
$count = $resultMany->getInsertedCount();3.修改
[*]原
$collention->update($condition, [
'$set' => $values
,[
'multiple' => true//多条，单条false
]);
[*]新
$collection->updateOne(
['state' => 'ny'],
['$set' => ['country' => 'us']]
);
$updateResult = $collection->updateMany(
['state' => 'ny'],
['$set' => ['country' => 'us']]
);
$count = $updateResult->getModifiedCount();4.查询
[*]原
$cursor = $collection->find($condition, [
'name' => true//指定字段
]);
$cursor->skip(5);
$cursor->limit(5);
$cursor->sort([
'time' => -1
]);
[*]新
$cursor = $collection->find($condition, [
'skip' => 5,
'limit' => 5,
'sort' => [
   'time' => -1
],//排序
'projection' => [
   'name' => 1//指定字段
]
]);5.删除
[*]原
$collention->remove($condition, [
'justOne' => false//删单条
]);
$collention->remove([]);//删所有
[*]新
$result = $collention->deleteOne($condition, $options);
$collention->deleteMany($condition, $options);

$result->getDeletedCount();补充有些人可能习惯以类似 MySQL 的自增 ID 来处理数据，以前可能使用 findAndModify() 方法来查询并修改：$collention->findAndModify([
'_id' => $tableName//我在自增表中用其它的表名作主键
], [
'$inc' => ['id' => 1]//自增
], [
'_id' => 0
], [
'new' => 1//返回修改后的结果，默认是修改前的
]);现在使用 MongoDB 库的话需要修改为：$collention->findOneAndUpdate([
'_id' => $tableName
], [
'$inc' => ['id' => 1]
], [
'projection' => ['id' => 1],
'returnDocument' => MongoDB\Operation\FindOneAndUpdate::RETURN_DOCUMENT_AFTER
]);

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升级PHP7操作MongoDB