mongodb - How to avoid loading referenced documents when creating a new document? -

i have playlist document references many song documents, in turn reference others documents:

/** @document(collection="playlists") */ class playlist {     /**      * @var \doctrine\common\collections\collection      *      * @referencemany(targetdocument="song", simple=true)      */     protected $songs; }  /** @document(collection="songs") */ class song {     /**      * @var string      *      * @referenceone(targetdocument="foo", simple=true)      */     protected $foo;      /**      * @var string      *      * @referenceone(targetdocument="bar", simple=true)      */     protected $bar; } 

another document like references 1 playlist:

/** @document(collection="likes") */ class {     /**      * @var playlist      *      * @referenceone(targetdocument="playlist", simple=true)      */     protected $playlist; } 

each time persist (insert) new like document, of references (deep or not) loaded (a lot of associated queries executed) ; is, in specific case, useless.

how can avoid "greedy" behavior (model refactor, configuration, caching etc.)?

use manual referencing:

https://docs.mongodb.org/manual/reference/database-references/#manual-references

in short store "list" id in articles it's associated with.

then when change "list" not need load associated articles.

you can articles given "list" still with:

db.articles.find({"listid" : "foo"})

i think purpose of "list" collection change - unsure without seeing schema. reason quotes around "list".