Module Overview

What You’ll Learn

• Model one-to-many relationships in a Prisma schema
• Model many-to-many relationships in a Prisma schema
• Load related data efficiently with include and select

💡 Why this module matters: Real data is rarely one flat table, users have posts, posts have tags. This module covers modeling those relationships correctly in Prisma, and loading related data without the extra-query problem that catches most beginners.

What’s Covered

• One-to-many relationships, foreign keys and relation fields in schema.prisma.
• Many-to-many relationships, implicit and explicit join models.
• Eager loading, using include and select to fetch related data in one query.
• Foreign key constraints, what the database enforces once relationships are defined.

Hands-On

By the end of this module, you’ll have modeled both one-to-many and many-to-many relationships in Prisma, migrated them into a real database, and queried related data efficiently.

Next module: the full CRUD query API Prisma Client provides.