Roda & Sequel blog app

1. Motivation
2. Setup
3. Application structure
   • Gems
   • Boot process

Motivation ⇡

Self-introduction into Roda, Sequel ecosystem and Zeitwerk autoloading.

Setup ⇡

1. Install dependencies:

bundle install

2. Configure the .env file

touch .env

# Generate a secret key:
ruby -r 'securerandom' -e 'puts "SECRET_KEY=#{SecureRandom.hex(32)}"' > .env

# Add database name:
cat "DATABASE_NAME=YOUR_DB_NAME" > .env

3. Prepare the database (sqlite3):

bundle exec rake db:create
bundle exec rake db:migrate

4. Run Puma application server at http://localhost:9292 with a Rake default task:

rake

# OR to run explicitly:

rake start

Application structure & architecture ⇡

Gems

The application is built with:

1. Roda routing toolkit for routing
2. Sequel for database connection, migration and ORM
   • sequel_tools to use Rake tasts for DB operations
3. Zeitwerk to autoload/reload application during development
4. dry-configurable for ApplicationSettings class to store application settings
5. tilt & erubi for the view layer

Boot process

1. Entrypoint: config.ru
2. requires config/boot
3. requires config/application_loader and config/application_settings
4. config/application_loader sets up the zeitwerk gem, which autoloads the whole app directory
5. Rack runs the Router from app/router.rb (basically the application itself, with routes and actions)

Models are in app/models directory.

Views are in app/views directory. Partials are supported as well.