slash_migrate

A development-only Rails engine that gives you a GUI for everyday database migrations. Mount it, visit /rails/migrate, and create models, design columns and indexes, and modify existing tables — while it shows you the exact migration code it will write, so you pick up the commands as you go.

It's built for people still getting comfortable with Active Record migrations.

Development only. slash_migrate writes real files to db/migrate and app/models and runs real migrations against your database. It mounts in your development environment only (configurable) and should never be loaded in production.

Add it to the development group of your Gemfile:

group :development do
  gem "slash_migrate"
end

Then install:

bundle install

There's no routes.rb change to make — the engine mounts itself at /rails/migrate in development. Start your server and visit http://localhost:3000/rails/migrate.

• Browse your tables, columns, indexes, and foreign keys.
• Create a model and its migration, with column types, null / default, indexes (including unique), and references / foreign keys.
• Add, edit, or drop columns on an existing table.
• Add or drop indexes.
• Run, roll back, or delete pending migrations.

Every screen previews the migration (and model) code it will generate before you commit to it.

The defaults suit most apps. To change them, add an initializer:

# config/initializers/slash_migrate.rb
SlashMigrate.configure do |config|
  config.mount_path = "/rails/migrate"          # where the engine mounts
  config.enabled_environments = ["development"]  # environments it runs in
end

The engine mounts itself when routes are drawn, which happens after your initializers run — so overriding these values here takes effect.

• Ruby >= 3.4
• Rails >= 8.1.3

Bug reports and pull requests are welcome at https://github.com/firstdraft/slash_migrate.

Released under the MIT License.