Firestore security rules : searching for a user's id in array in a document

Question

First, sorry for my terrible English, it is not my native language...

I am building a simple app in Firebase, using the Firestore database. In my app, users are memb

Answer 1

I made it happen with this code

Allow some user to read/write some document of a collection if this same user is present into an array of another collection

service cloud.firestore {
  match /databases/{database}/documents {
    match /repositories/{accountId} {
      allow read, write: if request.auth.uid in get(/databases/$(database)/documents/accounts/$(accountId)).data.users
    }
  }
}