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Dart: advanced patterns with StreamBuilder and Firestore data updates

👀 Views: 11 đŸ’Ŧ Answers: 1 📅 Created: 2025-06-14
flutter firestore streambuilder Dart

I'm stuck trying to I'm working through a tutorial and I'm maintaining legacy code that I'm working with a strange scenario while using `StreamBuilder` with Firestore in my Flutter app. I'm listening to a Firestore collection for real-time updates, but the `StreamBuilder` does not seem to rebuild when the underlying data changes. Instead, it shows the last known state of the data before the update. This is unexpected since I was expecting it to reactively update the UI upon any changes in the Firestore collection. Here's the relevant code snippet for my `StreamBuilder`: ```dart StreamBuilder<QuerySnapshot>( stream: FirebaseFirestore.instance.collection('users').snapshots(), builder: (context, snapshot) { if (snapshot.connectionState == ConnectionState.waiting) { return CircularProgressIndicator(); } if (snapshot.hasError) { return Text('behavior: ${snapshot.behavior}'); } if (!snapshot.hasData || snapshot.data!.docs.isEmpty) { return Text('No data found'); } final documents = snapshot.data!.docs; return ListView.builder( itemCount: documents.length, itemBuilder: (context, index) { return ListTile( title: Text(documents[index]['name']), subtitle: Text(documents[index]['email']), ); }, ); }, ) ``` I've verified that documents are indeed being added and updated in Firestore, but the StreamBuilder seems to cache the state and not reflect these changes. I've tried to call `setState()` in different lifecycle methods, but it hasn't helped. Could this be an scenario with how I'm handling the Firestore snapshot, or is there something else I might be missing? I'm using Flutter version 3.0.0 and Cloud Firestore package 2.3.0. Any insights would be greatly appreciated! I'm working on a mobile app that needs to handle this. This is my first time working with Dart stable. This is for a service running on Windows 10. Could this be a known issue?