Undefined logger in firebase function - node.js

Question

I am trying to send push notifications to firebase using swift, node.js and firebase functions. I can successfully push some of my notifications however I am having a hard time with my messages.
my firebase functions look like,
my functions in node.js look like,
exports.observeMessages = functions.database.ref('/messages/{fromId}/{toId}').onCreate((snapshot, context) => {
const fromId = snapshot.val().fromId;
const toId = snapshot.val().toId;
console.log('LOGGER --- uid is ' + fromId);
console.log('LOGGER --- workerId is ' + toId)
})
these messages are stored in firebase like,
I have tried to send these push notifications with
var toId = context.params.toId;
var fromId = context.params.fromId;
When I post the latter in my node.js code, I see
below is how I am sending the message information to firebase
fileprivate func sendMessageWithProperties(_ properties: [String: Any]) {
let ref = Database.database().reference().child("messages")
let childRef = ref.childByAutoId()
let toId = user!.uid!
let fromId = Auth.auth().currentUser!.uid
let timestamp = Int(Date().timeIntervalSince1970)
var values: [String: Any] = ["toId": toId, "fromId": fromId, "timestamp": timestamp, "checked": 0]
properties.forEach({values[$0] = $1})
childRef.updateChildValues(values) { (error, ref) in
if error != nil {
print(error!)
return
}
self.inputContainerView.inputTextField.text = nil
guard let messageId = childRef.key else { return }
let userMessagesRef = Database.database().reference().child("user-messages").child(fromId).child(toId).child(messageId)
userMessagesRef.setValue(1)
let recipientUserMessagesRef = Database.database().reference().child("user-messages").child(toId).child(fromId).child(messageId)
recipientUserMessagesRef.setValue(1)
}
}

Answer 1

The issue might be in ref('/messages/{fromId}/{toId}'). As you want to fire the function when a new message is added in the messages array, try changing it to ref('/messages/{messageId}').
exports.observeMessages = functions.database.ref('/messages/{messageId}').onCreate((snapshot, context) => {
const fromId = snapshot.val().fromId;
const toId = snapshot.val().toId;
console.log('LOGGER --- uid is ' + fromId);
console.log('LOGGER --- workerId is ' + toId)
})