Problem in writing Firebase Firestore Rules

Question

I have a document named 'PublicList' that can be read by anyone in a collection. However I want to allow read to the rest of the documents in that collection only if request.auth != null. However it is not working.

This is the code:

 match /users/{user} {
        allow read: if user == 'PublicList';
        allow read, write: if user != 'PublicList' && request.auth != null;
      }

Answer 1

I think the second read will override the first. Can you try this?

match /users/{user} {
  allow read: if (user == 'PublicList' || (user != 'PublicList' && request.auth != null));
  allow write: if user != 'PublicList' && request.auth != null;
}

'PublicList' can be read by everyone. Any other document can be read by authenticated users only.

No documents can be written except 'PublicList' and that too by an authenticated user.