Enforcing Tenant Permissions with RLS and Handling Tenant Domains

In the previous chapter, you made your Next.js application tenant-aware and implemented the necessary database structure for multi-tenancy. However, we cannot consider it tenant-based yet as the application isn’t loading any specific tenant data or checking user-to-tenant permissions – it’s just that the structure allows multi-tenancy.

Gear up to bring the application to another level as you’ll make the application tenant-based in this chapter. Here, you’ll explore the implementation of row-level security (RLS) policies for simple and secure access to user-bound data, as well as navigate the nuances of RLS dependencies, refine your policies, and introduce custom claims for a streamlined RLS experience while unlocking the secret of data access.

After gaining a good understanding of RLS, you’ll continue to improve the existing authentication mechanisms; currently, they focus...