Raluca Badoi raluka

You MUST NOT try and generate a Rails app from scratch on your own by generating each file. For a NEW app you MUST use rails new first to generate all of the boilerplate files necessary.
Create an app in the current directory with rails new .
Use Tailwind CSS for styling. Use --css tailwind as an option on the rails new call to do this automatically.
Use Ruby 3.2+ and Rails 8.0+ practices.
Use the default Minitest approach for testing, do not use RSpec.
Default to using SQLite in development. rails new will do this automatically but take care if you write any custom SQL that it is SQLite compatible.
An app can be built with a devcontainer such as rails new myapp --devcontainer but only do this if requested directly.
Rails apps have a lot of directories to consider, such as app, config, db, etc.
Adhere to MVC conventions: singular model names (e.g., Product) map to plural tables (products); controllers are plural.
Guard against incapable browsers accessing controllers with `allo

Rails 7 new features. Before and After

Add ComparisonValidator
PostgreSQL generated columns
PostgreSQL custom enum types
Add tracking of belongs_to association
association_previously_changed? method
Add invert_where method
Add associated method
Add missing method
Active Record Encryption

Zug Simulator

In this exercise, we'll model the behavior of an U-Bahn or S-Bahn train.

Given a route which provides stations (just strings), the train's current station, and whether or not it's traveling in reverse (i.e., from the last stop to the first stop), the train should complete the route in the correct direction.

When the train's complete_route method is called, it should print a summary

 describe vs. context in rspec
 http://lmws.net/describe-vs-context-in-rspec
 In Rspec world, you often see people using both “describe” blocks and “context” blocks together, like this
 describe "launch the rocket" do
   context "all ready" do
   end
   context "not ready" do

	# copied from (thanks!): http://codesnippets.joyent.com/posts/show/615

	str = <<HTML_TEXT
	<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
	"http://www.w3.org/TR/html4/loose.dtd">
	<html>
	<body>
	<h1>Application error</h1>
	<p>Change this error message for exceptions thrown outside of an action (like
	in Dispatcher setups or broken Ruby code) in public/500.html</p>

	class MyApp
	attr_accessor :input, :output

	def initialize
	@input = $stdin
	@output = $stdout
	end

	def prompt_user
	user_selection = gets.chomp # => 'ponies'