Updating data
db.steps.update(
{ 'person' : "derickr" },
{ '$inc' : { "steps_made.20140202" : 712 } },
{ 'upsert' : true }
);
Record after update:
{
person: "derickr",
steps_made: {
"20140201": 10800,
"20140202": 712,
}
}
Atomic *per-document* only
No transactions
Can't use other field names in updates