CODEWITHSUNDEEP
androidfirebasefirebase-realtime-database
Faget Thomas
Faget Thomas

Reputation: 77

Duplicate keys in the Firebase database

Actually, I am implementing a Firebase database to store users for my android base.

Basically, this is my User bean :

public class User {

    private String idAccount;
    private String firstname;
    private String lastname;
    private String pseudo;
    private Address address;
    private List<Qualification> qualification;
    private boolean isWorker;

    // Constructors + getters + setters

}

And, once an User is created, I add it in the database with the method :

String idUser = user.getIdAccount();
usersRef.child(idUser).setValue(user);

So, this is very simple and it works but I have a little problem. If I check the database : the user added, I can see the idAccount is duplicate.

I know this is totally normal ! But I am looking for a simple way to remove this field idAccound in the database without explicitlu precise all the fields when I use the setValue(user).

Someone has a solution ?

Thank you !!

Upvotes: 1

Views: 1150

Answers (2)

Alex Mamo
Alex Mamo

Reputation: 138824

To remove that field from your entire database, please use the following code:

DatabaseReference rootRef = FirebaseDatabase.getInstance().getReference();
DatabaseReference usersRef = rootRef.child("users");
ValueEventListener eventListener = new ValueEventListener() {
    @Override
    public void onDataChange(DataSnapshot dataSnapshot) {
        for(DataSnapshot ds : dataSnapshot.getChildren()) {
            ds.child("idAccount").getRef().removeValue();
        }
    }

    @Override
    public void onCancelled(DatabaseError databaseError) {}
};
usersRef.addListenerForSingleValueEvent(eventListener);

After that, just simply add @Exclude annotation in front of the field in your model class like this:

@Exclude
private String idAccount;

If you are still in testing with your app, you can also remove the private String idAccount; entirely.

Upvotes: 1

mikeb
mikeb

Reputation: 11267

You need to use the @Exclude annotation.

https://firebase.google.com/docs/reference/android/com/google/firebase/database/Exclude

public class User {
    @Exclude
    private String idAccount;
    private String firstname;
    private String lastname;
    private String pseudo;
    private Address address;
    private List<Qualification> qualification;
    private boolean isWorker;

    // Constructors + getters + setters

}

I would not do this, but that's how.

Upvotes: 1

Related Questions