Remove specific node from Firebase in JavaScript

Question

how do I remove this specific node in my database as shown in this picture below? (the nickname will be different since I'm just testing it, if anyone confuses)

I've tried

    const roomRef = firebase.database().ref(`allRooms/${rooms}`);

    roomRef.orderByChild('nickname').equalTo(`${username}`).once('value',(snapshot)=> {  
                   snapshot.ref.remove();  })

But it just delete all of my nodes in that room, thank you

Answer 1

You're almost there.

When you execute a query against the Firebase Database, there will potentially be multiple results. So the snapshot contains a list of those results. Even if there is only a single result, the snapshot will contain a list of one result. And your code needs to handle the fact that `` is a list with something like:

roomRef.orderByChild('nickname').equalTo(username).once('value',(snapshot)=> {
  snapshot.forEach((userSnapshot) => {  
    userSnapshot.ref.remove();  
  })
})

---

The above runs a separate remove() call for each matching node. If you have only one (or a few) nodes with the same name, this is probably fine. But if you have more of them, consider using a single multi-path update to remove all nodes like this:

roomRef.orderByChild('nickname').equalTo(username).once('value',(snapshot)=> {
  let updates = {};
  snapshot.forEach((userSnapshot) => {  
    updates[userSnapshot.key] = null; // 👈 setting to null will remove the node
  })
  roomRef.update(updates); // 👈 send all updates in one call
})