Currently if one needs to insert a document only once for a particular "primary" value then they need to do something like:

db.coll1.findOneAndUpdate({"item":"abc1"},{$setOnInsert:{"item":"abc1","xyz":123}},{upsert:true,returnNewDocument:true})

The above returns the document if it exists already. If not, then it inserts that document. Instead of this can we have a API/method for upsertAndFetch().