PostgreSQL RLS for Multi-Tenant Isolation: Protecting 4-Tier Data as a Solo Developer [Part 4]
What You’ll Learn Comparison of data isolation patterns for multi-tenant SaaS Practical usage of PostgreSQL Row-Level Security (RLS) RLS policy design for 4-tier hierarchy (System/Provider/Reseller/Consumer) Setting RLS context with Go + pgx Detecting RLS leaks through testing Introduction As introduced in Part 1, Saru is a multi-tenant SaaS with a 4-tier account structure. System Admin (manages the entire SMS platform) └── Provider (offers services) ├── Reseller (sells services) │ └── Consumer (purchases/manages) └── Consumer (direct sales) In this structure, data isolation is critical. ...