How OrderBy in Firebase Database with Swift

Asked Oct 08 '17 at 13:36

Active Oct 08 '17 at 13:36

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I have a Database with the Ranking of my Game. I trying to get the most high score players.

I trying to order by score. I tried some different queries but it doesn't ordering! It returns all the elements but not ordered. What should I do?

Code:

Database.database().reference().child("ranking")
                               .queryOrdered(byChild: "score")
                               .observe(.value, with: {
        (snapshot: DataSnapshot) in
            let ranking = snapshot.value as! NSDictionary

            for rankingPlayer in ranking {
                let player = rankingPlayer.value
                print(player)
            }
        })

Database:

PS: Why not order after got the snapshot result? Because I will have thousands of scores and I will just limit my query to the ten biggest high scores.

asked Oct 08 '17 at 13:36

Haroldo Gondim

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You're converting the `DataSnapshot` (which contains information about the order of items) to a dictionary (which is implicitly unordered). See my answer here: https://stackoverflow.com/a/41851185/209103 – Frank van Puffelen Oct 08 '17 at 15:32
Thank you @FrankvanPuffelen it worked perfectly !! – Haroldo Gondim Oct 08 '17 at 16:37

How OrderBy in Firebase Database with Swift

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