如何获得此级别的密钥？

Question

Hi, I have this problem in query in Firebase. The orderbykey() and orderbychild() doesn't work. How do I query this one?

cheers, thanks in advance.

Code Snippet:

    Query mRef = mRootRef.child("Messages").orderByKey().equalTo(mAuth.getCurrentUser().getUid());
    Query mRef = mRootRef.child("Messages").orderByChild("commWith").equalTo(mAuth.getCurrentUser().getUid());

Answer 1

i have just re design my JSON at firebase like in the image below, so that i could simply get the unique keys per data