dart - How to listen for document changes in Cloud Firestore using Flutter?

Question

I would like to have a listener method that checks for changes to a collection of documents if changes occur.

Something like:

import 'package:cloud_firestore/cloud_firestore.dart';


  Future<Null> checkFocChanges() async {
    Firestore.instance.runTransaction((Transaction tx) async {
      CollectionReference reference = Firestore.instance.collection('planets');
      reference.onSnapshot.listen((querySnapshot) {
        querySnapshot.docChanges.forEach((change) {
          // Do something with change
        });
      });
    });
  }

The error here is that onSnapshot isn't defined on CollectionReference.

Any ideas?

Answer 1

Waitting for answers