PHP MongoDB计数记录 [英] PHP MongoDB Count Records

问题描述

我已经在php中编写了一个简单的MongoDB查询

I've wrote a simple MongoDB Query in php

计算过去一个小时内的在线总数一切正常

That calculates total online in the past hour everything works fine

但是我觉得这种方式不利于表现

But i feel this way is not good for performance

由于查询本身会自动返回所有匹配数据(因此该查询中不需要数据)

Be cause query it's self return all matches data ( so there is unneeded data in that query )

我需要的只是记录数

我有一个包含数百万个文档的集合

I have a collection that has millions of documents

脚本:

<?php
    // Last Online Time
    $Time = time() - 86400;

    // Connection
    $Manager = new MongoDB\Driver\Manager("mongodb://" . DB_USERNAME . ":" . DB_PASSWORD . "@" . DB_HOST . ":" . DB_PORT . "/" . DB_NAME);

    // Query
    $Query = new MongoDB\Driver\Query(['LastOnlineTime' => ['$gt' => (int) $Time]], []);

    // Result
    $Result = $Manager->executeQuery(DB_NAME . "." . $Collection, $Query);

    // Get Total Online In 1 Hour Ago
    echo count($Result->toArray());
?>

我有权利吗?

推荐答案

我找到了一个更好的MongoDB Command解决方案

I've found a much better solution MongoDB Command

在这里

<?php
    // Last Online Time
    $Time = time() - 86400;

    // Connection
    $Manager = new MongoDB\Driver\Manager("mongodb://" . DB_USERNAME . ":" . DB_PASSWORD . "@" . DB_HOST . ":" . DB_PORT . "/" . DB_NAME);

    // Command
    $Command = new MongoDB\Driver\Command(["count" => "account", "query" => ['LastOnline' => ['$gt' => (int) $Time]]]);

    // Result
    $Result = $Manager->executeCommand(DB_NAME, $Command);

    //print($Result->toArray());Array ( [0] => stdClass Object ( [n] => 228598 [ok] => 1 ) //so n is our totalcount
    // Get Total Online In 1 Hour Ago
    echo count($Result->toArray()[0]->n);
?>

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