MongoCollection::getDBRef

(PECL mongo >=0.9.0)

MongoCollection::getDBRef — Fetches the document pointed to by a database reference

Description

public array MongoCollection::getDBRef ( array $ref )

Parameters

ref: A database reference.

Return Values

Returns the database document pointed to by the reference.

Examples

Example #1 MongoCollection::getDBRef() example


<?php

$playlists = $db->playlists;

$myList = $playlists->findOne(array('username' => 'me'));

// fetch each song in the playlist
foreach ($myList['songlist'] as $songRef) {
    $song = $playlists->getDBRef($songRef);
    echo $song['title'] . "\n";
}

?>

The above example will output something similar to:

Dazed and Confused
Ma na ma na
Bohemian Rhapsody

In the above example each $songRef looks something like the following:

    Array
    (
        [$ref] => songs
        [$id] => 49902cde5162504500b45c2c
    )

User Contributed Notes

manuel at dziubas dot de

5 years ago


The "$id" has to be a 

new MongoId("...")

in PHP driver!

Ref:
array(
  "$ref" => "other_collection",
  "$id" => new MongoId("the_referenced_dataobject_id")
)