Database Change Streams Not Firing in Windsurf App
Your Windsurf-generated app uses database change streams or real-time subscriptions to push updates to the frontend, but events are not firing. Inserts, updates, and deletes in the database don't trigger the real-time listeners, so the UI stays stale and users have to manually refresh to see new data.
This is critical for features like live feeds, collaborative editing, real-time dashboards, and chat applications. Cascade sets up the subscription code, and it may work intermittently or only for certain operations, making the bug difficult to reproduce and diagnose.
The issue may appear as a dashboard that only updates on page refresh, a chat where new messages don't appear until you reload, or a collaborative document that doesn't reflect other users' changes in real time.
Error Messages You Might See
Common Causes
- Replica set not configured (MongoDB) — MongoDB change streams require a replica set. A standalone MongoDB instance silently ignores change stream requests
- Realtime not enabled on table (Supabase) — Supabase requires explicitly enabling real-time on each table in the dashboard or via SQL
- Subscription filter too restrictive — The change stream filter or subscription filter excludes the events you're expecting (e.g., filtering for INSERT but needing UPDATE)
- Connection closed silently — The change stream or WebSocket connection drops due to inactivity timeout, and the app doesn't reconnect
- Row Level Security blocking events — Supabase real-time respects RLS policies, so the subscription user may not have permission to see the changes
How to Fix It
- Verify database prerequisites — For MongoDB: confirm you're using a replica set (rs.status() in mongo shell). For Supabase: enable real-time on the table in Dashboard > Database > Replication
- Test with a broad subscription first — Remove all filters and subscribe to all changes on the table. If this works, narrow down filters one at a time to find what's excluding your events
- Add reconnection logic — Listen for close/error events on the change stream and automatically re-establish the subscription with exponential backoff
- Check RLS policies for real-time — For Supabase, ensure the subscribing user's role has SELECT permission and the RLS policy allows reading the changed rows
- Log stream events on the server — Add logging at the change stream listener level to determine if events are received by the server but not forwarded to the client
- Monitor connection state — Add client-side indicators showing whether the real-time connection is active, so users and developers can immediately see when it drops
Real developers can help you.
Krishna Sai Kuncha
Experienced Professional Full stack Developer with 8+ years of experience across react, python, js, ts, golang and react-native. Developed inhouse websearch tooling for AI before websearch was solved : )
Luca Liberati
I work on monoliths and microservices, backends and frontends, manage K8s clusters and love to design apps architecture
Vlad Temian
15+ years shipping production infrastructure for startups. Former CTO at qed.builders (acquired by The Sandbox).
Cursor ambassador and agentic tooling builder.
I've scaled systems, automated deployments, and built observability tools for AI coding workflows. I specialize in taking vibe-coded apps from broken prototype to production-ready: fixing Supabase auth/RLS, Stripe integrations, deployment pipelines, and cleaning up AI-generated spaghetti.
I build tools in this space (agentprobe, claudebin, micode) and understand both sides: how AI generates code and why it breaks.
https://blog.vtemian.com/
Mehdi Ben Haddou
- Founder of Chessigma (1M+ users) & many small projects
- ex Founding Engineer @Uplane (YC F25)
- ex Software Engineer @Amazon and @Booking.com
Richard McSorley
Full-Stack Software Engineer with 8+ years building high-performance applications for enterprise clients. Shipped production systems at Walmart (4,000+ stores), Cigna (20M+ users), and Arkansas Blue Cross. 5 patents in retail/supply chain tech. Currently focused on AI integrations, automation tools, and TypeScript-first architectures.
Costea Adrian
Embedded Engineer specilizing in perception systems. Latest project was a adas camera calibration system.
Simon A.
I'm a backend developer building APIs, emulators, and interactive game systems. Professionally, I've developed Java/Spring reporting solutions, managed relational and NoSQL databases, and implemented CI/CD workflows.
legrab
I'll fill this later
prajwalfullstack
Hi Im a full stack developer, a vibe coded MVP to Market ready product, I'm here to help
Matt Butler
Software Engineer @ AWS
You don't need to be technical. Just describe what's wrong and a verified developer will handle the rest.
Get HelpFrequently Asked Questions
Why do MongoDB change streams require a replica set?
Change streams are built on top of the oplog (operations log), which only exists on replica sets. A standalone MongoDB instance doesn't have an oplog. For local development, start a single-node replica set: mongod --replSet rs0, then run rs.initiate() in the shell.
How do I enable real-time on a Supabase table?
Go to your Supabase dashboard > Database > Replication, and toggle on the tables you want real-time events for. Alternatively, run: ALTER PUBLICATION supabase_realtime ADD TABLE your_table_name; in the SQL editor.