Lovable Form Submits but Supabase Saves Nothing
Quick Answer
How do I fix Lovable Form Submits but Supabase Saves Nothing?
Either RLS (Row Level Security) is blocking inserts, the Supabase connection isn't properly configured, or the table schema doesn't match what the form sends. Start with "Check RLS in Supabase" before making broader code changes.
Fix signals
- What this answers
- Why lovable form submits but supabase saves nothing happens and what to change first.
- Fastest move
- Check RLS in Supabase
- Use this page if
- Form submits successfully but data doesn't appear in Supabase
If this keeps happening
Open the next decision, not just the patch
Use these when the current fix is helpful, but the real answer is a better tool choice, a cleaner workflow layer, or a more trustworthy launch path.
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Deploy hub
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Tool picker
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Firecrawl review
Open this when the app also needs live web data and the next stack decision is no longer only about the builder itself.
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Quick Fix Summary
| Most likely cause | Either RLS (Row Level Security) is blocking inserts, the Supabase connection isn't properly configured, or the table schema doesn't match what the form sends. |
| Fastest fix | Check RLS in Supabase |
| Use this page if | Form submits successfully but data doesn't appear in Supabase |
Exact errors people search for
If one of these matches what you are seeing, you are likely on the right fix page.
Form submits successfully but data never appears in Supabase Supabase table stays empty after form submit Insert looked successful in the UI but no row was created
You're in the right place if...
- !Form submits successfully but data doesn't appear in Supabase
- !Supabase table is empty
- !No error shown to user
Why this happens
Either RLS (Row Level Security) is blocking inserts, the Supabase connection isn't properly configured, or the table schema doesn't match what the form sends.
Fix
Check RLS in Supabase
Go to Supabase Dashboard → Table Editor → your table → click the shield icon for RLS policies. If RLS is enabled with no policies, ALL inserts are silently blocked.
Temporarily disable RLS to test
Run this in Supabase SQL Editor to confirm RLS is the problem:
-- Run in Supabase SQL Editor -- TEMPORARY: disable RLS to test ALTER TABLE your_table_name DISABLE ROW LEVEL SECURITY; -- After confirming it works, re-enable -- and add proper policy instead
Tell Lovable to fix it
Ask Lovable to add proper RLS policies:
Copy this prompt
The contact form data is not saving to Supabase. Please check the RLS policies on the leads table and add a policy that allows anonymous inserts.
Prevent this next time
When connecting Supabase, always tell Lovable: 'Add RLS policies that allow the form to insert data for anonymous users.'
Frequently Asked Questions
Row Level Security. It controls who can read and write data. When enabled without policies, it blocks everything by default.
Only for testing. In production, add proper policies instead. Lovable can generate these for you.
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