Php/docs/mongocollection.createdbref
From Get docs
MongoCollection::createDBRef
(PECL mongo >=0.9.0)
MongoCollection::createDBRef — Creates a database reference
Description
public MongoCollection::createDBRef
( mixed $document_or_id
) : array
Parameters
document_or_id- If an array or object is given, its
_idfield will be used as the reference ID. If a MongoId or scalar is given, it will be used as the reference ID.
Return Values
Returns a database reference array.
If an array without an _id field was provided as the
document_or_id parameter, NULL will be returned.
Examples
Example #1 MongoCollection::createDBRef() example
<?php$songs = $db->songs;$playlists = $db->playlists;// create a reference to a song$manamana = $songs->findOne(array('title' => 'Ma na ma na'));$refToSong = $songs->createDBRef($manamana);// add the reference to my playlist$playlists->update(array('username' => 'me'), array('$push' => array('songlist' => $refToSong)));?>
