Firestore Security Rules: Allow User To Create Doc Only If New Doc ID is same as User ID

Question

When users log in for the first time, I need to also call a function that creates a document in my firestore users collection to store their profile data. Using Web SDK.

Answer 1

A little bit late, but I manage to tweak one of your possible solutions and make it work:

allow create: if path("/databases/(default)/documents/users/" + request.auth.uid) == request.path;

Just had to replace the database variable with (default). Yes, not fancy...