Module 7 · Chapter 7: Data and migrations
Data and migrations
In short
Write add-only migrations. At release: back up, migrate, then swap the app, so the old version keeps running if the migration fails. Rehearse risky migrations on a schema-only production copy with no user data.
After this lesson you can
- Design a simple table and write migrations that only add
- Run the migration before the new app version starts
- Rehearse risky migrations on a schema-only copy of the production database
Sign in to read this lesson
The title and summary are open to everyone. The full lesson is for signed-in learners.