Get data from Firebase database with conditions using Swift

Question

I have such structure of DB:

As you see I have two collections: 'Threads' and 'Users' I need to receive all threads where ownedId is wVlUM2Un9kNouOIlztKLvxxxPDh1 e.g.

What you need for this is a query. They covered in the Firebase documentation and some of these questions probably have good example too. — Frank van Puffelen
– Frank van Puffelen, Commented Aug 7, 2017 at 17:07
As Frank pointed out a query would likely be the easiest way to go about this. Another option would be to loop through the thread objects and add the threads with the correct id to an array. — Echizzle
– Echizzle, Commented Aug 7, 2017 at 17:12
@FrankvanPuffelen it seems you've already answered - stackoverflow.com/a/39647861/877223 — Aleksey Shevchenko
– Aleksey Shevchenko, Commented Aug 7, 2017 at 17:20

Gaurav Tiwari · Accepted Answer · 2018-10-16 12:48:27Z

1

Hi I had a similar scenario while working on a chatting application that used firebase as a backend service.

you can use a query as such, I did it through similar query

    FireBase.Reference.threads
        .queryOrdered(byChild: "ownerId")
        .queryEqual(toValue: "YourUserId")
        .observe(.value) { (snapshot) in
            if let messages = snapshot.value as? NSDictionary {
                // you will get all those threads where ownedId is what you need to fetch for
            }
    }

Hope this helps, please let me know if any corrections required.

answered Oct 16, 2018 at 12:48

Gaurav Tiwari

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