How to use Firebase query equalTo(value, key)?

Question

As a newbie in firebase I tried to mimic a kind of \"where clause\" request to retrieve the user\'s wallet in this simple use case:

User
   48bde8f8-3b66-40bc-b         


        

Answer 1

You can use nested Query for this.! if you have multiple random id you can easily compare them.! DatabaseReference reference = FirebaseDatabase.getInstance().getReference();

    Query query = reference.child("user");
    query.addListenerForSingleValueEvent(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            if (dataSnapshot.exists()) {
                // dataSnapshot is the "issue" node with all children with id 0
                for (DataSnapshot issue : dataSnapshot.getChildren()) {
                    // do something with the individual "issues"

Query query = reference.child("user").child(dataSnapshot.getKey().equals(YourData)));
    query.addListenerForSingleValueEvent(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            if (dataSnapshot.exists()) {






                }

            }
        }

        @Override
        public void onCancelled(DatabaseError databaseError) {

        }
    });