What are ORMs and how do migrations work in Node.js?
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What are ORMs and how do migrations work in Node.js?
ORMs, or Object-Relational Mappers, allow you to interact with databases using JavaScript objects. Migrations are scripts that help manage database schema changes.
Can you give me an example of how to create a migration in Node.js?
Sure! If you're using Sequelize, you can create a migration with the command npx sequelize-cli migration:generate --name create-users. This generates a file where you can define the changes.
What are some common ORMs used in Node.js?
Some popular ORMs for Node.js include Sequelize, TypeORM, and Mongoose for MongoDB.
How do I roll back a migration?
You can roll back a migration using the command npx sequelize-cli db:migrate:undo for Sequelize, which undoes the last migration.
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