Row Level Security (RLS) Policy Blocks All Database Access
Database queries fail with 'new row violates row-level security policy' or 'permission denied' errors. Users cannot read or write to tables despite having authentication credentials.
This occurs when RLS policies are too restrictive or missing entirely. RLS must be explicitly enabled per table and policies must allow the current auth context.
Error Messages You Might See
Common Causes
- RLS enabled but no SELECT policy exists for authenticated users
- Policy checks auth.uid() but user doesn't exist in referenced table
- Policies use != 'anonymous' instead of checking specific roles
- RLS conflicts between multiple overlapping policies
- Missing USING or WITH CHECK clauses in policy definition
How to Fix It
Create a basic policy allowing authenticated users:
CREATE POLICY 'Users can view own data'
ON public.users
FOR SELECT
USING (auth.uid() = id);Verify policies in Supabase dashboard > Authentication > Policies. Test with Supabase Console Query Editor to debug specific queries.
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Get HelpFrequently Asked Questions
How do I check if RLS is enabled?
Go to Supabase dashboard > Table Editor, select the table, and check the RLS toggle at the top right.
What policy should I use for public read/private write?
SELECT policy without auth check for public read, INSERT/UPDATE/DELETE policies with auth.uid() check for private write.