Rubizza lecture. Sinatra by Yasha Krasnov.

2. Супер быстрый прототип
# Gemfile
gem 'sinatra'
# app.rb
require 'sinatra'
get '/' do
'Hello world!'
end
# terminal
ruby app.rb
go to localhost:4567

3. Hot reload? EASY

4. SINATRA HOT RELOAD (SHOTGUN)
# gemfile
gem 'shotgun'
gem 'thin' (not necessary)
# terminal
shotgun app.rb --server=thin
go to localhost:9393

5. ActiveRecord?
use Padrino

6. Redis? Let’s do it!
# gemfile
gem 'ohm'
# app.rb
require 'ohm'
Ohm.redis = Redic.new('redis://127.0.0.1:6379')
get '/' do
Ohm.redis.call 'SET', 'Foo', 'Bar'
Ohm.redis.call 'GET', 'Foo'
end

7. WTF!? WHAT IS REDIS?
https://redis.io/documentation
https://redis.io/topics/quickstart

8. How to surprise your mentors?
Full guide:
https://www.oreilly.com/library/view/sinatra-up-and/9781449306847/ch04.html
http://rusrails.ru/rails-routing
https://blog.carbonfive.com/2013/06/24/sinatra-best-practices-part-one/
https://blog.carbonfive.com/2013/06/28/sinatra-best-practices-part-two/

9. Small guide
Your Architecture should look like
PLEASE! DON’T WRITE YOUR SINATRA
APPLICATION IN SINGLE FILE. IT SHOULD BE
MODULAR!

10. HOW?
# controllers/application_controller.rb
require 'sinatra'
class ApplicationController < Sinatra::Base
end

11. # controllers/users_controller.rb
class UsersController < ApplicationController
# index
get '/' do
'index'
end
#show
get '/:id' do
params[:id]
end
# update
# delete
# new
# create
end

12. How to run it?
# start config.ru
require 'sinatra/base'
Dir.glob('./{helpers,controllers}/*.rb').each { |file|
require file }
map('/users') { run UsersController }
map('/') { run ApplicationController }
# end config.ru
# terminal
shotgun config.ru --server=thin

13. Templates? YES!
Full info: http://sinatrarb.com/intro.html , ctrl+f Templates
gem ‘slim’
# application_controller.rb
class ApplicationController
set :views, File.expand_path(File.join( __FILE__, '../../views'))
…
end
# users_controller.rb
get '/' do
@some_variable = 123
slim :'/users/index'
end

14. # views/users/index.slim
.some_class_name
= @some_variable
in erb
<div class=’some_class_name’>
<%= @some_variable %>
</div>
in html
<div class=”some_class_name”>
123
</div>

15. Links
https://www.oreilly.com/library/view/sinatra-up-and/9781449306847/ch04.html
http://rusrails.ru/rails-routing
https://blog.carbonfive.com/2013/06/24/sinatra-best-practices-part-one/
https://blog.carbonfive.com/2013/06/28/sinatra-best-practices-part-two/