How to check if name already exists in Firebase Realtime Database (Firebase & JS)-CodePudding

I am trying to check if a name already exists on a Firebase Realtime Database that is structured as follows:

Here is my code:

const players = Firebase.database().ref("players");

function nameCheck() {
        console.log(name);

        players
        .orderByChild('settlement_name')
        .equalTo(name)
        .once('value')
        .then(snapshot => {
            if(snapshot.exists()){
                let playerData = snapshot.val();
                console.log(playerData)
                setError('Settlement name already exists')
                return playerData
            } else {
                console.log('Settlement name not found');
            }
        })
    }

Why this function is not correctly identifying when a name exists? I am logging the name at the start of the function and it matches those on the database, yet it will only return that the name is not found.

CodePudding user response：

You need to use the nested child path, as explained in the doc.

    players
      .orderByChild('settlement/settlement_name')
      ...

PS: In case you check if a name exists in order to use this name to create a new database node (if it does not exist), you should use a Transaction.