firebase - Firestore security rule get() not work

Question

The solution is in the end of the post. Check it out.

Решение проблемы в конце поста. Дочитайте.

just a simple question: whats wrong with this and why this is not working?

Trying to get access with user who has role 'admin' in users section to the /titles/{anyTitle} but still get

Missing or insufficient permissions.

service cloud.firestore {
  match /databases/{database}/documents {
    match /{document=**} {
      allow write: if false;
      allow read: if false;
    }
    function userCanWrite () {
      return get(/databases/{database}/documents/users/$(request.auth.uid)).data.role == "admin";
    }
    match /titles/{anyTitle=**} {
      allow read: if request.auth != null;
      allow write: if userCanWrite();
    }
  }
}

Here is my database structure

P.S.

I tried another rule from official documents get(/databases/{database}/documents/users/$(request.auth.uid??)).data.isAdmin == true;

and this is not working too

UPDATE: CORRECT WAY TO DO IT

Support helped me find the solution this is how you should do:

db structure:

users -> {{ userid }} -> { role: "admin" }

database rule settings:

get(usersPath/$(request.auth.uid)).role == "admin" || get(usersPath/$(request.auth.uid)).data.role == "admin";

Answer 1

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