How can I get the required data?

Question

    ref = Database.database().reference()

    let currentUserID = Auth.auth().currentUser?.uid

    let userRef = ref.child("users").child(currentUserID!)

    let userRefQuery = userRef.queryOrdered(byChild: "requests").queryEqual(toValue: "received")

    userRefQuery.observeSingleEvent(of: .value, with: { (snapshot) in

        if (snapshot.value is NSNull) {

            print("no data found")
            return
        }

        print("value:")
        print(snapshot.value)

        print("key:")
        print(snapshot.key)

    })

Firebase Database

How can I get the userIDs of users under "requests" which has a value of "received". Because it might also be "sent". Currently, I am not getting any data!

You're going to need to post your Firebase database as a screenshot. — Matt Harris, Aug 27 '17 at 09:58
Hey @MattHarris! I have edited my post. You can have a look at my firebase database now. — Kinshuk Singh, Aug 27 '17 at 10:26
Hey @3stud1ant3! I am getting the userID of the current user — Kinshuk Singh, Aug 27 '17 at 10:40
replace .value with .childAdded and see what is the output of print(snapshot) — 3stud1ant3, Aug 27 '17 at 10:42
Remove .queryEqual(toValue: "received") and see what is the output?Are we getting the right requests? — 3stud1ant3, Aug 27 '17 at 10:49
With .value, I am getting just the email of the current user. And with .childAdded, I am getting whole database of current user, that is current user's email, name, requests, and uID — Kinshuk Singh, Aug 27 '17 at 11:01
Hey! I got the desired result. Not by querying though! you can see my edit section under my question — Kinshuk Singh, Aug 27 '17 at 11:06
Good work, I think instead of edit, you should post it as an answer, that will be more helpful to other — 3stud1ant3, Aug 27 '17 at 11:13
check this answer https://stackoverflow.com/questions/36729247/retrieving-data-using-firebase-swift/36729395#36729395 — BHAVIK, Aug 27 '17 at 15:49

score 0 · Answer 1 · answered Aug 27 '17 at 11:26

This is how I got it worked:

ref = Database.database().reference()

let currentUserID = Auth.auth().currentUser?.uid

refHandle = ref.child("users").child(currentUserID!).observe(.value, with: { (snapshot) in

    print(snapshot)

    if let userDict = snapshot.value as? [String: Any] {

        if let requests = userDict["requests"] as? [String: String] {

            print(requests)

            for request in requests {

                if request.value == "sent" {

                    self.userIDs.append(request.key)
                    print(request.key)

                }

            }

        }


    }

}

score 0 · Answer 2 · edited Oct 04 '17 at 07:02

0

For the question that you deleted, instead of:

char temp = s[start]

do

char temp = s[i];

edited Oct 04 '17 at 07:02

boop_the_snoot

3,209
4
33
44

answered Oct 04 '17 at 04:31

Ryne

1,195
2
14
32

Yes, but that would skip all whitespaces. And I don't want that. I just want to skip the whitespace at the starting of a new line. Anyways, thanks a lot – Kinshuk Singh Oct 04 '17 at 04:40
char temp = s[i] + ' '; will add whitespace. if you also remove the cout << "\n" line it will put your string in one line and there will be whitespaces between the words. if your looking to get something different and still need help feel free to let me know what results your trying to get – Ryne Oct 04 '17 at 05:01
I was looking for something different but not got it. Thank a lot anyways! – Kinshuk Singh Oct 04 '17 at 12:59

How can I get the required data?

2 Answers2