How do I do a get_or_create in pymongo (python mongodb)?
You can use "upsert" equal to true. Then the update query you run with "upsert" as true will do exactly what you want.
- update if exists.
- insert new if it does not exist.
From MongoDb documentation:
db.collection.update( criteria, objNew, upsert, multi )
Arguments:
criteria - query which selects the record to update;
objNew - updated object or $ operators (e.g., $inc) which manipulate the object
upsert - if this should be an "upsert"; that is, if the record does not exist, insert it
multi - if all documents matching criteria should be updated
http://www.mongodb.org/display/DOCS/Updating
Example:
db.test.update({"x": "42"}, {"$set": {"a": "21"}},True)
#True => Upsert is True
See "update" documentation here :
http://api.mongodb.org/python/current/api/pymongo/collection.html
http://api.mongodb.org/python/current/api/pymongo/collection.html#pymongo.collection.Collection.update
Set upsert=True