What are Rails migrations and how do they work?

What are Rails migrations and how do they work?

Rails migrations are a way to modify your database schema over time in a consistent and easy manner. They allow you to create, change, and drop database tables and columns.

Can you give me an example of a migration?

Sure! A simple migration to create a 'users' table might look like this: class CreateUsers < ActiveRecord::Migration[6.0] def change create_table :users do |t| t.string :name t.string :email t.timestamps end end end.

How do I roll back a migration?

You can roll back a migration using the command rails db:rollback. This will undo the last migration that was run.

What if I want to run a specific migration?

You can run a specific migration by using the command rails db:migrate:up VERSION=your_migration_version. Replace 'your_migration_version' with the actual version number.