supabase-rls

Supabase RLS

Enable RLS

ALTER TABLE posts ENABLE ROW LEVEL SECURITY;

-- Users can only read published posts
CREATE POLICY "Public posts" ON posts FOR SELECT USING (published = true);

-- Users can only edit their own posts
CREATE POLICY "Own posts" ON posts FOR ALL USING (auth.uid() = user_id);

-- Admin can do anything
CREATE POLICY "Admin access" ON posts FOR ALL USING (
    EXISTS (SELECT 1 FROM users WHERE id = auth.uid() AND role = 'admin')
);

Common Patterns

• auth.uid() — current user's ID
• auth.jwt() — full JWT claims
• Use WITH CHECK for INSERT/UPDATE validation
• Separate SELECT/INSERT/UPDATE/DELETE policies for fine-grained control