Mastering Postgres Row Level Security (RLS) in Production

How to properly lock down your database tables while maintaining high-throughput programmatic access through service roles.

Marcus Vance

• 3 min read

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Mastering Postgres Row Level Security (RLS) in Production

Why RLS is Non-Negotiable

Row Level Security allows you to specify declarative policies at the database layer. Even if your client code has bugs or leaks an anon key, your data cannot be altered or read without satisfying the Postgres security policy.

sql
-- Public can only read published posts
CREATE POLICY "Public Read Access"
  ON public.posts FOR SELECT
  USING (published = true);

With Supabase, the service_role key bypasses RLS securely on the server-side Next.js API route, letting your API endpoint authenticate incoming callers with custom secret keys!

Tagged Topics

#PostgreSQL#Supabase#Security#Backend

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