WebMar 3, 2024 · You are creating a new key and storing it inside a variable. You can do that in the beginning (when storing data to the database), add data to Intent:. DatabaseReference ref = FirebaseDatabase.getInstance().getReference(); String removeQuery = ref.child("EventData").push().getKey(); Intent intent = new Intent(getBaseContext(), … WebApr 11, 2024 · Retrieve lists of items or listen for additions to a list of items. This event is triggered once for each existing child and then again every time a new child is added to the specified path. The listener is passed a snapshot containing the new child's data. child_changed. Listen for changes to the items in a list.

node.js - delete from firebase real time database - Stack Overflow

WebNow if you want to remove a specific user from the database you have to use this code: ref.child("Users").child("User2").removeValue(); Since firebase is a key value database, it will remove the value from User2 and also the key since the key can't be on it's own. … WebReference JavaScript SDK Firebase JavaScript API reference. Documentation. JavaScript version 8 API reference. Overview Fundamentals Build Release & Monitor … cme courses healthstream

java - Delete a child in Firebase - Stack Overflow

WebSep 7, 2024 · The code that calls the Firebase API to delete the node looks fine, so more likely the problem is in the data that you pass to it. I recommend console.log ( "contact/" + auth.uid + "/" + $ ('#kea').val ()) right before you try to delete the node, and checking what that outputs - and if that matches the path in the database exactly. WebMar 4, 2024 · 1 Answer. When data is being deleted, the newData variable will be null. So you can check if it exists using the exists () method: "registrations": { "approved": { … WebApr 10, 2024 · Delete a child in Firebase. I have tried to remove a child from my firebase database, but the problem is that it gives me an error: java.lang.NullPointerException: Attempt to read from field … cme grain markets