Emulating foreign key constraints with Drizzle relationships

This post details how to use Drizzle ORM with PlanetScale to establish virtual relationships between tables, emulating foreign key behavior without requiring database-level foreign key constraints. It demonstrates how to define these relationships in Drizzle's schema and query related data, and explains how to handle cascading actions (like deleting associated records) in application code when a parent record is deleted. This approach is necessary because PlanetScale, built on Vitess, does not support foreign key constraints due to performance and zero-downtime schema update considerations.