[FIXED] Firebase realtime DB update child

Issue

I have a "Users" data structure like this, I want to increment the value of ttl_user by 1 when a user is signed up. And decrement it by 1 when a user has deleted their account.

How can I update the value? Thanks.

Solution

In your particular case, it would be as simple as:

DatabaseReference db = FirebaseDatabase.getInstance().getReference();
DatabaseReference userRef = db.child("User");
userRef.child("ttl_user").setValue(ServerValue.increment(1));

And to decrement, simply pass a negative value -1.

Answered By - Alex Mamo
Answer Checked By - Pedro (JavaFixing Volunteer)