CODEWITHSUNDEEP
javaandroidfirebasefirebase-realtime-database
nelsola
nelsola

Reputation: 108

How to delete from Firebase Realtime Database using key?

I'm currently working on a project and I need to be able to delete from a database I've already created. I created it using the .push() to the database hence a unique key is created and thus needed for delete operations.

I tried using the answer from Frank Van Puffelen here How to delete from firebase realtime database?, but I ran into a bug where if two nodes have the same title they'll be deleted.enter image description here

The image shows how my Firebase database looks:

A bit of assistance or direction to an answer would go a long way. Thanks

Upvotes: 2

Views: 248

Answers (1)

Alex Mamo
Alex Mamo

Reputation: 138969

If you want to delete a single element from your database, you need to know the path to that element, which includes also that pushed key. Your reference should look like this:

DatabaseReference rootRef = FirebaseDatabase.getInstance().getReference();
DatabaseReference keyRef = rootRef.child("-KlSNx87aYigsH3lLp0D");
keyRef.removeValue().addOnCompleteListener(new OnCompleteListener<Void>() {
    @Override
    public void onComplete(@NonNull Task<Void> task) {
        if (task.isSuccessful()) {
            Log.d("TAG", "Element removed successfully!");
        }
    }
});

Otherwise, you can use a query that looks exactly like this:

Query idQuery = rootRef.orderByChild("id").equalTo(1);

In this case, Frank Van Puffelen's answer from the following post:

Will work perfectly fine.

Upvotes: 1

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