Building ScriptLyra: Row-Level Security and Content UX with Supabase & Next.js
Engineering a Medium-inspired content publishing platform. How Row-Level Security in PostgreSQL simplifies multi-tenant authorization without application-tier leaks.
The Philosophy Behind ScriptLyra
The modern web is inundated with cluttered reading experiences — modal popups, ad banners, and invasive trackers. With ScriptLyra, my goal was to build a sanctuary for long-form technical prose and thoughtful articles.
The platform pairs a distraction-free editorial interface with a rock-solid security boundary built directly at the database layer.
Leveraging PostgreSQL Row-Level Security (RLS)
In conventional web applications, authorization logic is often scattered across API route handlers and middleware. A single missed check can lead to unauthorized data disclosure or article tampering.
With Supabase, we define security declarative policies directly inside PostgreSQL. Even if a client performs a direct REST query, the database itself enforces tenant boundaries.
-- Declarative RLS for article mutations in ScriptLyra
ALTER TABLE articles ENABLE ROW LEVEL SECURITY;
-- Anyone can read published articles
CREATE POLICY "Public articles are viewable by everyone"
ON articles FOR SELECT
USING (status = 'published');
-- Authors can view all their own drafts
CREATE POLICY "Authors can view own drafts"
ON articles FOR SELECT
USING (auth.uid() = author_id);
-- Authors can modify only their own articles
CREATE POLICY "Authors can update own articles"
ON articles FOR UPDATE
USING (auth.uid() = author_id);Next.js 15 Server Components & Typography
By rendering public articles through React Server Components, the initial HTML payload contains zero client-side JavaScript for the article text itself. This ensures near-instant First Contentful Paint (FCP) and optimal SEO indexing.
The typography scale was fine-tuned for high legibility: generous line-height (1.75), crisp monochrome contrast, and responsive fluid type clamps.