Migrations

What a Prisma ORM migration is, the plan-review-apply loop, and how operations check the database.

How Prisma ORM models migrations as a graph of contract states, why that makes branching and parallel work safe, and the commands to inspect it.

A tutorial for the migration plan command, from a contract change to a migration you can review, without connecting to a database.

How to edit a Prisma ORM migration.ts by filling placeholder data transforms, writing typed backfills, using rawSql, and recompiling ops.json with node migration.ts.

How the Prisma ORM db migrate command applies migrations, from targeting refs and hashes and previewing with --show to checking status and running safely in development and production.

How to roll back a Prisma ORM migration, recover from a migration that failed, and fix a database that changed without a migration.