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Moving authorization to Postgres with Supabase RLS: a worked policy set, the verification steps that matter, and the performance tradeoffs we hit in production.
Step‑by‑step guide to enable RLS on a Supabase Postgres table, create a user‑owned SELECT policy, test the behavior, and roll back if needed.
Authenticated but getting 403s or empty results from Supabase? Diagnose Row Level Security misconfigurations with pg_policies queries, JWT role checks, and targeted fixes.
Application-level tenant filters fail the day someone forgets one. Supabase's Row Level Security moves multi-tenant authorization into PostgreSQL itself — here's the pattern, the performance cost, and how to verify it.
Enabling RLS in Supabase can quietly block all access if policies are missing. This post walks through the canonical auth.uid() policy pattern, a verified setup example, and the performance and security trade‑offs you need before enabling it.
A practical guide to locking down tables with Supabase RLS, using auth.uid() and JWT claims, and avoiding common pitfalls in multi‑tenant Postgres apps.
In Supabase the database is the API, so Row Level Security — not API keys — is the real security boundary. A worked policy example, common footguns, and the per-row performance trade-off.
A concise architecture note covering requirements, the smallest suitable RLS design, trust boundaries, operational checks, failure modes, and conditions that would trigger a redesign.
A concise architecture note covering requirements, minimal design, trust boundaries, operational checks, failure modes, and redesign triggers for Supabase RLS using auth.uid().
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