Ultra fast web development with sinatra
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Ultra fast web development with Classyhat is required. It features Pedro "Frank" Gaspar and Sérgio "Sinatra" Santos. Sinatra is a small web framework for server-side applications in Ruby that allows setting up simple web applications quickly. The document then provides instructions on installing Sinatra and building a basic "Hello New York" application to get started with Sinatra web development.
![Variableshungry = trueanswer = 42cost = 0.99PI = 3.14name = "Sérgio Santos"fruit = ['apple', 'banana', 'grape'] # fruit[1] -> 'banana'mix = ['door', 37, 15.2, false]names = { 'Sérgio' => 'Santos', 'Pedro' => 'Gaspar' }names['Sérgio']](https://image.slidesharecdn.com/ultrafastwebdevelopmentwithsinatra-110210092811-phpapp02/85/Ultra-fast-web-development-with-sinatra-13-320.jpg)
![Cycleswhilenothungryputs "work"endputs "work" whilenothungry1.upto(10) { |n|puts n }['ruby', 'python', 'php'].each do |language|puts "I cancode " + languageend](https://image.slidesharecdn.com/ultrafastwebdevelopmentwithsinatra-110210092811-phpapp02/85/Ultra-fast-web-development-with-sinatra-15-320.jpg)
![get '/moon' do "Fly me to themoon…"endpost '/destroy-world' do "Boom"endget '/hello/:name' do "Hello " + params[:name]end](https://image.slidesharecdn.com/ultrafastwebdevelopmentwithsinatra-110210092811-phpapp02/85/Ultra-fast-web-development-with-sinatra-18-320.jpg)
![Sessionsenable :sessionsget '/visit' dosession[:visits] = 0 unlesssession[:visits] session[:visits] += 1 "Youvisitedthispage #{session[:visits]} times."end](https://image.slidesharecdn.com/ultrafastwebdevelopmentwithsinatra-110210092811-phpapp02/85/Ultra-fast-web-development-with-sinatra-19-320.jpg)
![get '/hello/:name' do "Hello " + params[:name]end](https://image.slidesharecdn.com/ultrafastwebdevelopmentwithsinatra-110210092811-phpapp02/85/Ultra-fast-web-development-with-sinatra-23-320.jpg)
![get '/hello/:name' do @name = params[:name]erb :helloendtemplate :hello do "Hello <%= @name %>"end](https://image.slidesharecdn.com/ultrafastwebdevelopmentwithsinatra-110210092811-phpapp02/85/Ultra-fast-web-development-with-sinatra-24-320.jpg)
![get '/hello/:name' do @name = params[:name]erb :helloendviews/hello.erb:Hello <%= @name %>](https://image.slidesharecdn.com/ultrafastwebdevelopmentwithsinatra-110210092811-phpapp02/85/Ultra-fast-web-development-with-sinatra-25-320.jpg)
![get '/show' do @names = ['Sérgio', 'Pedro']erb :showendviews/show.erb:<% if @names.empty? %> This place is empty.<% else %> We got: <% for name in @names %> <%= name %> <% end %><% end %>](https://image.slidesharecdn.com/ultrafastwebdevelopmentwithsinatra-110210092811-phpapp02/85/Ultra-fast-web-development-with-sinatra-26-320.jpg)
![Validationsget '/' doerb :indexendpost '/registration' do @person = Person.create(:name => params['name'], :email => params['email']) if @person.saved?erb :thanks elseerb :index endendviews/index:<p style="color: red;"> <% for error in @person.errors %> <%= error %><br/> <% end %></p>](https://image.slidesharecdn.com/ultrafastwebdevelopmentwithsinatra-110210092811-phpapp02/85/Ultra-fast-web-development-with-sinatra-35-320.jpg)
Ultra fast web development with sinatra
- 2. Ultra fastwebdevelopmentwithfeaturingPedro "Frank" GasparSérgio "Sinatra" Santos
- 6. Setup
- 7. WindowsOne-ClickInstaller – go to ruby-lang.orgMac OSX(pre-installed, draw a hatinstead)Linux (Ubuntu)sudoapt-getinstallrubyrubygems
- 10. hello.rb:require 'sinatra'get '/' do "New York, New York"end
- 12. Ruby 101
- 13. Variableshungry = trueanswer = 42cost = 0.99PI = 3.14name = "Sérgio Santos"fruit = ['apple', 'banana', 'grape'] # fruit[1] -> 'banana'mix = ['door', 37, 15.2, false]names = { 'Sérgio' => 'Santos', 'Pedro' => 'Gaspar' }names['Sérgio']
- 14. Conditionsif grade >= 10puts "Yey!"elseputs "humpf"endcase minutes_latewhen 0..5 thenputs "ontime"when 5..15 thenputs "fair"when 15..30 thenputs "late"elseputs "doorclosed"end
- 15. Cycleswhilenothungryputs "work"endputs "work" whilenothungry1.upto(10) { |n|puts n }['ruby', 'python', 'php'].each do |language|puts "I cancode " + languageend
- 16. Functionsdefgreetings(names)names.each do |first, last|puts "Hello " + first + " " + lastendendnames = { 'Sérgio' => 'Santos', 'Pedro' => 'Gaspar' }greetings(names)
- 17. Controllers
- 18. get '/moon' do "Fly me to themoon…"endpost '/destroy-world' do "Boom"endget '/hello/:name' do "Hello " + params[:name]end
- 19. Sessionsenable :sessionsget '/visit' dosession[:visits] = 0 unlesssession[:visits] session[:visits] += 1 "Youvisitedthispage #{session[:visits]} times."end
- 20. Filtersbefore doputsrequest.ipendget '/hello' do "Hi!" endget '/bye' do "Bye!" endafter doputs "Alldone"end
- 21. Templates
- 22. PublicfolderAll files insidethefolder 'public' are sharedGreat for static files like javascript, css, images…
- 23. get '/hello/:name' do "Hello " + params[:name]end
- 24. get '/hello/:name' do @name = params[:name]erb :helloendtemplate :hello do "Hello <%= @name %>"end
- 25. get '/hello/:name' do @name = params[:name]erb :helloendviews/hello.erb:Hello <%= @name %>
- 26. get '/show' do @names = ['Sérgio', 'Pedro']erb :showendviews/show.erb:<% if @names.empty? %> This place is empty.<% else %> We got: <% for name in @names %> <%= name %> <% end %><% end %>
- 27. views/layout.erb:<html> <head> <title>My Sinatra App</title> </head> <body> <%= yield %> </body></html>
- 28. Database
- 29. require 'sinatra'require 'dm-core'require 'dm-migrations'DataMapper.setup(:default, "sqlite3://#{Dir.pwd}/event.sqlite3")class Person include DataMapper::Resource property :id, Serial property :name, String property :email, String property :date, Time, :default => Time.nowendDataMapper.auto_upgrade!
- 30. TypesBooleanStringTextFloatIntegerDecimalDateTime, Date, Timehttp://datamapper.org/docs/properties
- 31. Operationsperson = Person.create(:name => 'Sérgio‘, :email => 'me@sergiosantos.info')person = Person.newperson.name = 'Sérgio'person.email = 'me@sergiosantos.info'person.saveperson.update(:name => 'Pedro')person.destroyhttp://datamapper.org/docs/create_and_destroy
- 32. OperationsPerson.get(5)Person.first( :name => 'Sérgio' )Person.lastPerson.all( :name.like => 'Sérgio' )Person.all( :date.gt => Time.now – 1 * 60 * 60 ) # Last hourhttp://datamapper.org/docs/find
- 34. Validationsrequire 'dm-validations'class Person include DataMapper::Resource property :id, Serial property :name, String property :email, String property :date, Time, :default => Time.nowvalidates_length_of :name, :within => 3..100validates_uniqueness_of :emailendhttp://datamapper.org/docs/validations
- 35. Validationsget '/' doerb :indexendpost '/registration' do @person = Person.create(:name => params['name'], :email => params['email']) if @person.saved?erb :thanks elseerb :index endendviews/index:<p style="color: red;"> <% for error in @person.errors %> <%= error %><br/> <% end %></p>
- 36. Projects