implementing-tenancy-patterns

To enforce data isolation in a multi-tenant SQL database, you must implement tenant-scoped tables and apply tenant-aware uniqueness constraints. This ensures every resource is tied to a specific tenant_id, preventing unauthorized cross-tenant access.

Common multi-tenancy anti-patterns include polymorphic ownership and global uniqueness constraints that ignore tenant boundaries. Detecting and rectifying these violations ensures strict tenant scoping and prevents data leakage across the application.

Designing RBAC schema for a multi-tenant SaaS requires enforcing role design within the User-Owned Organization model. This approach scopes role assignments to specific tenants, ensuring permissions and data access are correctly isolated per organization.

The best way to safely migrate multi-tenant database schemas is using the expand-contract pattern. This migration safety pattern guides schema evolution without downtime, ensuring robust data isolation is maintained during structural changes.

You should use the User-Owned Organization model for multi-tenancy when your SaaS application requires strict schema governance and data isolation per organization. It provides a robust framework for auditing tenant-scoped tables and enforcing RBAC.