MongoDB\Collection::getReadPreference()

定义

MongoDB\Collection::getReadPreference()

Returns the read preference for this collection.

function getReadPreference(): MongoDB\Driver\ReadPreference

Return Values

A MongoDB\Driver\ReadPreference object.

例子

<?php
$collection = (new MongoDB\Client)->selectCollection('test', 'users', [
    'readPreference' => new MongoDB\Driver\ReadPreference('primaryPreferred'),
]);
var_dump($collection->getReadPreference());

而输出将类似如下所示：

object(MongoDB\Driver\ReadPreference)#5 (1) {
  ["mode"]=>
  string(16) "primaryPreferred"
}

另请参阅

• 读取偏好 in the MongoDB manual

• MongoDB\Client::getReadPreference()

• MongoDB\Database::getReadPreference()

• MongoDB\GridFS\Bucket::getReadPreference()