php7 mongo查询findOne的问题 [英] problems with php7 mongo query findOne

问题描述

我有Ubuntu 16.04，php7和mongo.

I've ubuntu 16.04, php7 and mongo.

更新系统后，我的代码不起作用...我有一个新版本的php.

After update the system, my code doesn't work... I've a new version of php.

在更新之前，我的代码是:

Before update, my code was:

  // connect
  $m = new MongoClient();
  // select a database
  $db = $m->clients;
  // select a collection (analogous to a relational database's table)
  $collection = $db->suscriptions;
  // Check if exists in DB
  $query = array('email' => $email);
  $cursor = $collection->findOne($query);

更新后，我按照php文档的指示更改了连接，但是我无法进行任何查询... 这是我的代码，如果我删除最后一行，该代码将起作用:

After update, I changed the connection as indicated by the php documentation, but I can't do any query... This is my code, if I remove the last line, the code works:

  // connect
  $m = new MongoDB\Driver\Manager("mongodb://localhost:27017");
  // select a database
  $db = $m->clients;
  // select a collection (analogous to a relational database's table)
  $collection = $db->suscriptions;
  // Check if exists in DB
  $query = array('email' => $email);
  // Problem
  $cursor = $collection->findOne($query);

你能帮我吗?谢谢！

推荐答案

您使用的管理器api不正确.

You usage of manager api is incorrect.

$m = new MongoDB\Driver\Manager("mongodb://localhost:27017");
$filter= array('email' => $email);
$options = array(
  'limit' => 1
);
$query = new MongoDB\Driver\Query($filter, $options);
$rows = $m->executeQuery('clients.suscriptions', $query);

或者，您应该通过 composer 提供与旧api类似的语法.

Alternatively, you should install the library through composer which provides similar syntax as old api.

require 'vendor/autoload.php';
$m= new MongoDB\Client("mongodb://127.0.0.1/");
$db = $m->clients;
$collection = $db->suscriptions;
$query = array('email' => $email);
$document = $collection->findOne($query);

https://docs.mongodb. com/php-library/master/tutorial/crud/#find-one-document

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