Upserting Documents
Upserting documents in the MongoDB ODM is easy. All you really have to do
is specify an ID ahead of time and Doctrine will perform an update operation
with the upsert flag internally instead of a batchInsert.
Example:
<?php$article = new Article();$article->setId($articleId);$article->incrementNumViews();$dm->persist($article);$dm->flush();The above would result in an operation like the following:
<?php$articleCollection->update( ['_id' => new MongoDB\BSON\ObjectId($articleId)], ['$inc' => ['numViews' => 1]], ['upsert' => true, 'safe' => true]);The extra benefit is the fact that you don't have to fetch the $article in order
to append some new data to the document or change something. All you need is the
identifier.
|
Identifiers must uniquely map to document object instances. When you persist a
new document whose identifier is already used by a different managed document,
the identity map keeps the first instance. A deprecation is triggered, and an
exception is thrown if |