A production-tested guide to implementing PostgreSQL RLS in a multi-tenant Rails application. Extracted from a real SaaS codebase serving thousands of workspaces.
Data is isolated at two levels:
- Organization (billing, memberships, API keys)
- Workspace (all operational data — posts, comments, files, etc.)
Adapt these to your tenancy model. Single-tenant apps can drop the organization layer entirely and use just tenant_id.