MongoDB\Driver\WriteResult::getMatchedCount

(mongodb >=1.0.0)

MongoDB\Driver\WriteResult::getMatchedCount — Returns the number of documents selected for update

说明

final public int|null MongoDB\Driver\WriteResult::getMatchedCount ( void )

If the update operation results in no change to the document (e.g. setting the value of a field to its current value), the matched count may be greater than the value returned by MongoDB\Driver\WriteResult::getModifiedCount().

参数

此函数没有参数。

返回值

Returns the number of documents selected for update, or NULL if the write was not acknowledged.

错误／异常

范例

Example #1 MongoDB\Driver\WriteResult::getMatchedCount() example

<?php

$manager = new MongoDB\Driver\Manager;

$bulk = new MongoDB\Driver\BulkWrite;
$bulk->insert(['x' => 1]);
$bulk->update(['x' => 1], ['$set' => ['y' => 3]]);
$bulk->update(['x' => 2], ['$set' => ['y' => 1]], ['upsert' => true]);
$bulk->update(['x' => 3], ['$set' => ['y' => 2]], ['upsert' => true]);
$bulk->delete(['x' => 1]);

$result = $manager->executeBulkWrite('db.collection', $bulk);

var_dump($result->getMatchedCount());

?>

以上例程会输出：

int(1)

参见