Multi Upsert ArangoDB

Question

My collection:

{"date": "5-1-2020", "country": "US", score: 0}
{"date": "5-1-2020", "country": "CA", score: 10}
{"date": "5-2-2020", "country": "US", score: 7}
{"date": "5-2-2020", "country": "CA", score: 11}

Here is the scenario: I need to update the score for the US game on 5-1-2020 to 17.

Pseudocode:

Search for date: "5-1-2020" and country "US".
If found UPDATE score to 17.
If not found insert record of {"date": "5-1-2020", "country": "US", score: 17}

My working solution:

FOR doc in collection

UPSERT { "date": "5-1-2020", "country": "US" }

INSERT doc

UPDATE { "score": 17 } in collection

If my collection was:

{"date": "5-1-2020", "country": "CA", score: 10}
{"date": "5-2-2020", "country": "US", score: 7}
{"date": "5-2-2020", "country": "CA", score: 11}

The solution/upsert doesn't work.

Answer 1

I think what you mean to do is this:

UPSERT { "date": "5-1-2020", "country": "US" }
INSERT { "date": "5-1-2020", "country": "US", "score": 17 }
UPDATE { "score": 17 } IN collection

Find document based on date and country and update its score, or insert a new document with date, country and score. Note that there is no outer FOR loop, which would iterate over the collection unnecessarily and potentially cause the same update to be performed hundred of times.