ios - Firestore listener for sub collections

Question

I have my Firestore setup in the following way:

Channels [collection] ----> channelID ---> Messages [collection] ---> messageID

How would I add snapshotListener to sub collection 'Messages' ?

  Firestore.firestore().collection("Channels").document().collection("Messages").addSnapshotListener { (querySnapshot, error) in
        guard let snapshot = querySnapshot else {
            print("Error listening for channel updates: (error?.localizedDescription ?? "No error")")
            return
        }

        snapshot.documentChanges.forEach { change in 
           print(change)
        }
    }

This didn't work for me

Answer 1

Waitting for answers