Fix: Lovable Can't Connect to Supabase
Quick Answer
Check that your Supabase project URL and anon key are correct in Lovable's settings. Then verify that Row Level Security (RLS) policies allow the operations you need.
Quick Fix Summary
| Issue | Supabase connection failed |
| Fastest fix | Verify Supabase credentials |
| Use this page if | Error: 'Failed to connect to Supabase' |
Symptoms
- !Error: 'Failed to connect to Supabase'
- !Tables exist but data doesn't load
- !Authentication works but database queries fail
- !Row Level Security (RLS) blocking all requests
Step-by-Step Fix
Verify Supabase credentials
In Lovable, go to Settings > Integrations > Supabase. Confirm the project URL and anon key match your Supabase dashboard (Settings > API).
Check RLS policies
In Supabase Dashboard > Authentication > Policies, ensure you have policies that allow SELECT, INSERT, UPDATE for authenticated users. A common mistake is enabling RLS without adding any policies.
Test the connection directly
Open your Supabase dashboard > SQL Editor and run: SELECT * FROM your_table LIMIT 1. If this fails, the issue is in your schema, not Lovable.
Regenerate API keys
If credentials are compromised or expired, regenerate them in Supabase Dashboard > Settings > API > Regenerate keys. Update them in Lovable.
Check Supabase project status
Free Supabase projects pause after 1 week of inactivity. Check your project status in the Supabase dashboard and restore if paused.
Frequently Asked Questions
RLS blocks all access by default. You must create policies that explicitly allow operations. A policy like 'allow all for authenticated' is the simplest starting point.
Lovable generates apps that use Supabase by default. You can modify the code to use a different database, but it requires manual changes.
Related
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