Lovable + Supabase not working: data, auth and RLS checklist
When a Lovable frontend loads but Supabase data does not, debug the boundary between the browser and Supabase. The response from the failing request is usually more useful than another generated UI change.
WHAT THIS USUALLY LOOKS LIKE
- Save appears to do nothing.
- Data reads work but inserts or updates fail.
- It works for one user but not another.
- Production behaves differently from preview.
LIKELY FAILURE AREAS
Row Level Security
RLS may allow SELECT while rejecting INSERT or UPDATE, or the policy may depend on an authenticated user that is missing.
Wrong project or environment
The deployed app may point at a different Supabase URL/project or be missing the public client configuration.
Auth state mismatch
The request can reach Supabase without the session or user identity expected by the policy.
CHECK THESE FIRST
- Inspect the failed Supabase request in Network tools and read its response.
- Confirm the deployed app targets the intended Supabase project.
- Review RLS policies for the exact table and operation.
- Confirm the current user/session exists when the request runs.
- Check migrations/schema against the actual production database.
WHAT WE NEED TO INVESTIGATE IT
- GitHub repository
- Supabase project access if policies/schema must be inspected
- A test user when the failure is user-specific
Do not paste passwords, private API keys or other secrets into the public submission form. We request additional access only after scope review when it is actually required.
COMMON QUESTIONS
Should I disable RLS to make it work?+
Do not use disabling security as a generic production fix. Identify which operation and user should be allowed, then implement the narrow policy the application requires.
Can this be fixed without Lovable access?+
Often yes. The generated code, request response and Supabase configuration are the important evidence.
RELATED FIX GUIDES
STOP DEBUGGING
THE PROMPT LOOP.
VibeHell investigates the actual application, confirms scope and price, then implements and verifies the repair.