MongoCursor::getReadPreference
(PECL mongo >=1.3.3)
MongoCursor::getReadPreference — Get the read preference for this query
Beschreibung
public array MongoCursor::getReadPreference
( void
)
Parameter-Liste
Diese Funktion hat keine Parameter.
Rückgabewerte
This function returns an array describing the read preference. The array contains the values type for the string read preference mode (corresponding to the MongoClient constants), and tagsets containing a list of all tag set criteria. If no tag sets were specified, tagsets will not be present in the array.
Beispiele
Beispiel #1 MongoCursor::getReadPreference() return value example
<?php
$m = new MongoClient();
$cursor = $m->test->users->find();
$cursor->setReadPreference(MongoClient::RP_SECONDARY, array(
array('dc' => 'east', 'use' => 'reporting'),
array('dc' => 'west'),
array(),
));
var_dump($cursor->getReadPreference());
?>
Das oben gezeigte Beispiel erzeugt folgende Ausgabe:
array(2) {
["type"]=>
string(9) "secondary"
["tagsets"]=>
array(3) {
[0]=>
array(2) {
["dc"]=>
string(4) "east"
["use"]=>
string(9) "reporting"
}
[1]=>
array(1) {
["dc"]=>
string(7) "west"
}
[2]=>
array(0) {
}
}
}
Siehe auch
- The read preferences documentation.
- MongoCursor::setReadPreference() - Set the read preference for this query
- MongoCursorInterface::getReadPreference() - Get the read preference for this query