Upserts in mongodb.

Lecture Notes When this video was originally recorded, for MongoDB 2.6, the format was: > db.collection.update( query_document , update_document , [ upsert_boolean , [ multi_boolean ] ] ) This is no longer the recommended format. We now recommend: > db.collection.update( query_document, update_document, options_document ) where options_document contains key:value pairs such as: multi : true/false, upsert : true/false, writeConcern: document