maker-leo

The Ruby universe

This is a brief introduction into the world of web development and Ruby. To view all the different gems listed by popularity check out the Ruby Toolbox.

Web frameworks

Rails - the most popular, although recently has been criticised for being a bit bloated - giving you more than you often need to build a simple web site
Sinatra - takes the opposite principal, more of a "micro framework" that starts with just enough to get you going, and you can then add Gems for more advanced stuff as and when you need it

Models

Sublime Text 2

Although you're free to use any editor we recommend Sublime. Here's how to get the most out of it

Setting up

Once you've installed Sublime there's a few things you should do to get things set up properly:

	# Shoulda activemodel cheatsheet

	# DB
	should have_db_column(:title).of_type(:string).with_options(default: 'Untitled', null: false)
	should have_db_index(:email).unique(:true)

	# Associations
	should belong_to :company
	should have_one(:profile).dependent(:destroy)
	should have_many(:posts).dependent(:nullify)

	require 'minitest/autorun'
	require 'mocha/setup'
	require './lib/dice'

	class DiceTest < MiniTest::Unit::TestCase

	def setup
	@one_dice = Dice.new(1)
	@two_dice = Dice.new(2)
	end

	#create your own methods
	#create a method with one argument, and print it out
	#create a method with two arguments
	#create a method with one argument, which by default is nil
	#create a method that returns two values, depending on if an argument is true or false

	#take this hash, and use it to make this string. Make sure you use the hash twice,
	#and use string interpolation i.e. "A string #{variable}"

	hash = {:dario => "Dario", :leo => "Leo"}

	def do_some_maths
	puts yield(10)
	puts yield(20)
	end

	do_some_maths do \|num\|
	num * 20
	end

	do_some_maths do \|number\|

	# You can loop through a range
	(1..10).each {\|a\| puts a }

	first_ten = (1..10).to_a

	# You can convert it into an array
	puts first_ten.inspect

	puts "selecting odd numbers"

	includes(:answers)
	.where("user_id IS NULL OR user_id != ?", user_id)


	- Copy setup.zip to your Downloads folder


	- Double click the folder to unzip the folder


	- Open the folder, and then once inside: