Hands On Sinatra Intro

Hands On Demo

This introductory demo script uses source code from sinatra_first_project, which you can find in my sinatra_examples repo.

Steps

• Ruby 2.6
• Directories
  • Create directory myapp/ in a convenient spot and cd to it
  • Set that directory up as a git repo: git init
• Create the simplest possible sinatra app and run it
  • Add app.rb, with just get ‘/’ “hello world”
• Create a gemfile, bundle, and run the program
• Install Postgres: Detailed Installation Guides
• Update app.rb to full example
• Add model directory,
  • And model.rb
• Create config directory
  • database.yml tells activerecord where and how the databases are
  • Indicate the modes and the database names
• Add db directory
  • Take a look at schema.rb
  • create migration in migrate folder
  • rake db:migrate
• Run the program
  • Error, no erb!
• Create views directory
  • Add index.erb with a form in it.
  • Form will allow user to enter data
  • But entering a new model gives an error
  • Now add a another view called models.erb
• Show that we have a list of models now
• Success!

Screencast of Handson Demo