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MongoDB\Driver\WriteConcern::isDefault

(mongodb >=1.3.0)

MongoDB\Driver\WriteConcern::isDefault — Checks if this is the default write concern

Опис

final public MongoDB\Driver\WriteConcern::isDefault(): bool

Returns whether this is the default write concern (i.e. no options are specified). This method is primarily intended to be used in conjunction with MongoDB\Driver\Manager::getWriteConcern() to determine whether the Manager has been constructed without any write concern options.

The driver will not include a default write concern in its write operations (e.g. MongoDB\Driver\Manager::executeBulkWrite()) in order to allow the server to apply its own default, which may have been » modified. Libraries that access the Manager's write concern to include it in their own write commands should use this method to ensure that default write concerns are left unset.

Параметри

У цієї функції немає параметрів.

Значення, що повертаються

Returns true if this is the default write concern and false otherwise.

Помилки/виключення

Приклади

Приклад #1 MongoDB\Driver\WriteConcern::isDefault() example

<?php

$wc = new MongoDB\Driver\WriteConcern(1);
var_dump($wc->isDefault());

$manager = new MongoDB\Driver\Manager('mongodb://127.0.0.1/?w=majority');
$wc = $manager->getWriteConcern();
var_dump($wc->isDefault());

$manager = new MongoDB\Driver\Manager('mongodb://127.0.0.1/');
$wc = $manager->getWriteConcern();
var_dump($wc->isDefault());

?>

Поданий вище приклад виведе:

bool(false)
bool(false)
bool(true)

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