Rails Docker setup

A very simple setup to work on Rails apps in a Docker container.

Launch the containers

1. Start the database: docker-compose up -d mysql
2. Start the dev container: docker-compose run --rm -p 3000:3000 rails_dev

Create a new Rails app

rails new . --database db_type

Create a database and update the database connection options in config/database.yml.

Launch the app

1. Install dependencies: bundle install
2. Start the Rails service: rails server -b 0.0.0.0

Create models and migrations

This will generate a model and the corresponding migration:

rails g model field1:type field2:type ...

To generate just a migration:

rails g migration migration_name

Run migrations:

rails db:migrate