Routes are in routes.rb in a config folder
rails --version need 5.1.6
rails new <applicationName> -T -d="postgresql" --skip-spring --skip-turbolinks
-T (no minitest)
-d (database)
-spring (reloader)
-turbolinks (use JS to reload fragments)
rails g rspec:install or rails generate rspec:install
features folder in rspec all tests end with _spec.rb
first line of tests require 'rails_helper'
setup, exercise, Assert Teardown for tests
rails generation for migrations
rails g migration CreateSongs title:string length:integer play_count:integer
In Routes get '/route', to: 'controller#method'
resources :<controller>, only: [<desired routes>]
Controllers -- <model>s_controller.rb -- pluralize model applicationName
views must match method names inside folder that is named after resource/Controllers
rails server or rails s
rails console or rails c instead of tux
raisl g migration AddArtistToSongs artist:references
Can put ! on create for testing
has_many :playlist_songs
has_many :songs, through: :playlist_songs