This document provides an overview and introduction to the Ruby on Rails web framework. It discusses the following key points: - Rails was developed by 37signals to build their BaseCamp application. It uses convention over configuration and opinionated defaults to provide a productive environment for web development. - The MVC pattern organizes a Rails app into models, views, and controllers. Models manage data, views display it, and controllers handle requests and coordinate between models and views. - Rails makes data access very simple with ActiveRecord. Models map directly to database tables, and CRUD (create, read, update, delete) operations are straightforward. - Features like the rails console and built-in

1. Web Programming with
Rails

2. • Why Rails?
• Rails overview
• Dealing with Data
• Live Console and Testing
• About the class and other resources

3. Why Rails?

4. A Philly Moment

5. Rails Overview

6. • Developed for BaseCamp by 37 signals
• DSL for web applications

7. Controller

8. Controller

9. Controller
Model

10. Controller
Model

11. Controller
Model View

12. Controller
Model View

13. Convention over
Configuration

14. GET /comments
CommentsController#index
views/comments/index.html.erb

15. GET /comments/4
CommentsController#show
views/comments/show.html.erb

16. GET /comments/4.js
CommentsController#show
views/comments/show.js.erb

17. Data

18. More Convention over
Configuration

19. Super simple
•C reate
•R etreive
•U pdate
•D elete

20. Comment.create(:author => "mat")
INSERT INTO comments
(author) VALUES('mat');

21. Comment.find_by_author("mat")
SELECT * FROM comments
WHERE author = 'mat';

22. c = Comment.find(1)
c.update_attribute(:author, "mat")
SELECT * FROM comments WHERE id = 1;
UPDATE comments SET author = 'mat' WHERE
id = 1;

23. c = Comment.find(1)
c.destroy
SELECT * FROM comments WHERE id = 1;
DELETE FROM comments WHERE id = 1;

24. More data hotness
• Schema management
• Works the same across databases

25. rails console
• Try out code live
• Inspect your data using code

26. testing
• Built into rails
• Strong testing culture built into ruby

27. About the Class

28. Mat Schaffer
mat@mashion.net
@matschaffer
matschaffer.com

29. Trotter
Cashion
trotter@mashion.net
@cashion
trottercashion.com

30. Ryan Findley
ryan@neomindstudio.com
@neomindryan
neomindlabs.com

31. Rough Plan: Build stuff
• Week 1: Basic data and views
• Week 2: User stories and testing
• Week 3: Plugins
• Week 4: Deployment and Scaling

32. Logistics

33. Homework submission via github:
github.com
And heroku:
heroku.com
Working in pairs is encouraged!

34. Get help on the mailing list:
groups.google.com/group/
upenn-on-rails
Or IRC:
irc.freenode.net#philly.rb

35. Recommendations
• TryRuby.org
• RailsForZombies.com
• Agile Web Development with Rails
• Why’s Poignant Guide to Ruby

36. What do you want to
build?

37. Prerequisite:
Accounts
• https://github.com/signup/free
• https://api.heroku.com/signup

38. Prerequisite:
Setup
• Mac needs Xcode -
http://developer.apple.com/tools/xcode
• Windows maybe http://rubyinstaller.org/
• RVM - rvm.beginrescueend.com
• Or just use Ubuntu on VirtualBox

39. Test your install
rails new mysite
cd mysite
rails server
(open a browser to http://localhost:3000)