CODEWITHSUNDEEP
androidfirebasefirebase-realtime-database
LazyDev
LazyDev

Reputation: 15

updateChildren not updating the children?

So I am checking whether the username exists or not during the sign up procedure. The only problem is that my childupdates2 is not being added to the Usernames folder? The first childUpdate is added properly but the second childUpdate2 doesn't. It just doesnt update my Usernames folder?

 final DatabaseReference Userref = FirebaseDatabase.getInstance().getReference();
    username_check_query = Userref.child("Usernames").orderByChild("username").equalTo(mUsernameView.getText().toString());
    usernameChildEvent = new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            if(dataSnapshot.getValue() == null){

                ScoreClass scoreClass = new ScoreClass(10000, mUsernameView.getText().toString());
                Map<String, Object> scoredata = scoreClass.toMap();
                Map<String, Object> childUpdates = new HashMap<>();
                childUpdates.put("Users/" + user.getUid(), scoredata);
                Userref.updateChildren(childUpdates);


                Username username = new Username(mUsernameView.getText().toString());
                Map<String, Object> userdata = username.toMap();
                Map<String, Object> childUpdates2 = new HashMap<>();
                childUpdates2.put("/Usernames/" + user.getUid(), userdata);
                Userref.updateChildren(childUpdates2);
           }
           else {
                    // other code
            }
            username_check_query.removeEventListener(this);
        }

        @Override
        public void onCancelled(DatabaseError databaseError) {

        }
    };
username_check_query.addListenerForSingleValueEvent(usernameChildEvent);

Here is the database structure.

database structure

What am I doing wrong?

Upvotes: 0

Views: 1431

Answers (1)

Bob Snyder
Bob Snyder

Reputation: 38319

I can't reproduce your results. Add a completion listener to see what the status of the update is:

    Userref.updateChildren(childUpdates2, new DatabaseReference.CompletionListener() {
                @Override
                public void onComplete(DatabaseError databaseError, DatabaseReference databaseReference) {
                    if (databaseError == null) {
                        Log.i(TAG, "onComplete: success");
                    } else {
                        Log.w(TAG, "onComplete: fail", databaseError.toException());
                    }
                }
            });

Also verify that username.toMap() produces a non-empty map:

    Map<String, Object> userdata = username.toMap();
    if (userdata.isEmpty()) {
        Log.e(TAG, "Oops! No data");
    } else {
        Log.i(TAG, "userdata=" + userdata);
    }

Upvotes: 2

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