You are returning from the function before calling remove. Try: return oldItemsQuery.once(‘value’, function(snapshot) { // create a map with all children that need to be removed var updates = {}; snapshot.forEach(function(child) { updates[child.key] = null }); // execute all updates in one go and return the result to end the function return ref.update(updates); }).then(function() {; … Read more
Firebase Database queries can only perform prefix matches, so strings starting with a specific string or starting with a range of string. It is not possible to query for strings ending with a specific value, nor those ending with a range of values. If you really want to do this within Firebase, consider also storing … Read more
Well, I don’t know whats going on but, this works for me, Make sure your pods has at least these in there. PODFILE pod ‘Firebase/Storage’ pod ‘Firebase/Auth’ #Auth isn’t needed but, you should really use it. View controller import UIKit import FirebaseStorage class TestView: UIViewController { var imageView: UIImageView! override func viewDidLoad() { super.viewDidLoad() imageView … Read more
You may want to reconsider how the app is structured. If you are checking for usernames before being authenticated that means the node is exposed and anyone can grab a copy of all the usernames. Obviously that in itself may not be a huge issue but if your users decide to use an email, whoever … Read more
This answer is similar to a prior answer here What you want to do is to treat each child in Customers as a DataSnapshot, then the children can be accessed. Given a Firebase structure: usersDatabase uid_0 Customers Ben Smith data: “Some data” Tom Cruise data: “Some data” uid_1 Customers Leroy Jenkins data: “Some data” uid_2 … Read more
Asynchronous methods! You have to wait for the completion before you move on to the next step. Put the second block within the first completion handler – like this func pictureFromFirebase(loginMethod: Int) { if loginMethod == 0 //FB { var profilePic = FBSDKGraphRequest(graphPath: “me/picture”, parameters: [“height”:300, “width”:300, “redirect”:false], httpMethod: “GET”) let profilePicRef = storageRef.child((user?.uid)!+”/profile_pic.jpg”) profilePicRef.data(withMaxSize: … Read more
To solve this problem, move the declaration of your final int[] ndomande = {14}; array inside the onDataChange() method, otherwise it will be always null. public void onDataChange(DataSnapshot dataSnapshot) { //Toast.makeText(PlayTest.this, “FIN QUI “,Toast.LENGTH_SHORT).show(); final int[] ndomande = {14}; for (DataSnapshot messageSnapshot : dataSnapshot.getChildren()) { //Toast.makeText(PlayTest.this, “QUI “,Toast.LENGTH_SHORT).show(); long numero_domande = (long) messageSnapshot.getValue(); ndomande[0] = … Read more
I keep getting java.lang.String com.google.firebase.auth.FirebaseUser.getUid()’ error although it has already confirmed they is a user solved I keep getting java.lang.String com.google.firebase.auth.FirebaseUser.getUid()’ error although it has already confirmed they is a user
In your Database Reference make sure you are having the correct path to the data your are retrieving, like DatabaseReference ref = FirebaseDatabase.getInstance().getReference().child(“your/path/to/data”); ref.addValueEventListener(new ValueEventListener() { @Override public void onDataChange(@NonNull DataSnapshot dataSnapshot) { //making sure snapshot consists some data if (dataSnapshot.exists()) { //do your stuff User userDashboard = dataSnapshot.getValue(User.class); USERNAME.setText(userDashboard.getName().toString().trim()); PASSWORD.setText(userDashboard.getPassword().toString().trim()); EMAIL.setText(userDashboard.getEmail().toString().trim()); } } @Override … Read more
You need to change this line of code: mDatabaseReference.child(“drivers”).child(userid).toString() != userid || mDatabaseReference.child(“parents”).child(userid).toString() != useremail) { with mDatabaseReference.child(“drivers”).child(userid).getRef().toString() != userid || mDatabaseReference.child(“parents”).getRef().child(userid).toString() != useremail) { As you probably see, i have added the getRef() method to actually get the reference. Hope it helps. 7 solved What’s wrong in this code for firebase database? [closed]
This Solution work for me : This code will remove last item in adapter after performing deletion operation in firebase realtime database. mAcceptedList.removeAt(adapterPosition); mShortlistProfileAdapter.notifyDataSetChanged() override fun onItemClicked( adapterPosition: Int, mUserListProfile: ArrayList<UserProfile> ) { mShortlistedProfileVM?.deleteUserProfile(mUserListProfile.get(adapterPosition)) mAcceptedList.removeAt(adapterPosition); mShortlistProfileAdapter.notifyDataSetChanged() } } To Prevent item gets duplicated. Clear your list before adding data into list. mAcceptedList.clear() <—add this line … Read more
All You have to do is do a nested query .! first find key of parent then get pass that key to next query and then find its children.! List<user> userList=new ArrayList(); mdatabaseRef.addValueEventListener(new ValueEventListener() { @Override public void onDataChange(DataSnapshot dataSnapshot) { for (DataSnapshot child: dataSnapshot.getChildren()){ String key = child.getKey(); fun(key); } private void fun(String key){ … Read more
What your code doing is just replacing the current text in the TextView with the factdata.getFactDetail(). For example you have 3 elements 1, 2, and 3. Then you want to display the element inside the TextView. With your code, this is what happen First iteration: element = elements[0]; // element = 1 factViewBox.setText(element); // TextView … Read more