Question 1

How to rollback a specific migration in migrate-mongo, not just the last one?

Accepted Answer

Migrate-mongo's down command only undoes the last applied migration. To revert a specific one, you need to manually run down sequentially until reaching that migration or write a custom script, as there's no built-in feature for targeted rollback based on filename or timestamp.

Question 2

migrate-mongo vs using Mongoose migrations for MongoDB?

Accepted Answer

Migrate-mongo provides a standalone, version-controlled approach with transaction support and CLI flexibility, ideal for complex schema changes. Mongoose migrations are integrated into the ODM but may lack features like file hash verification and are tied to Mongoose's schema definitions.

Question 3

How to integrate migrate-mongo with a CI/CD pipeline?

Accepted Answer

Use the JavaScript API in your build scripts to run migrations programmatically with up() or down() functions. Set up environment-specific config files for different stages and ensure proper error handling to halt deployments on migration failures.

Question 4

Can migrate-mongo handle data seeding along with schema migrations?

Accepted Answer

Yes, you can write migration scripts that include data insertion or updates, but it's primarily designed for schema changes. For pure data seeding, consider using it with caution or pair it with complementary tools, as re-running migrations with useFileHash requires idempotent scripts.

Question 5

What happens if a migration fails in the middle of applying multiple scripts?

Accepted Answer

If an error occurs, migrate-mongo stops immediately and won't continue with remaining pending migrations, leaving the database in a partially migrated state that requires manual intervention to fix the issue before retrying.

Question 6

How to use migrate-mongo with MongoDB Atlas or cloud databases?

Accepted Answer

Configure the mongodb URL in the migrate-mongo-config.js file to point to your Atlas cluster, including authentication details and network settings. Ensure the IP whitelisting and VPC peering are set up for connectivity.

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