Rails3 is a lesson on the basic structure and components of a Ruby on Rails application. It introduces the model, view, controller pattern and shows the directory structure of a typical Rails project, including the app, config, db, and public folders. Key components like controllers, views, models, and the database are explained at a high level.

1. Rails3
by Minami.rb
L esso n 1

7. model(class)
controller view
(e.g.users_controller)

9. web (apache )
rack
controllers sprockets
models views
DB

10. prj. app controllers
config models
db views
lib assets images *.gif, *.png
log stylesheets application.css
public javascripts
script
test
tmp
vendor

11. prj. app
config
db migrate
lib
log
public
script
test
tmp
vendor

12. prj. app
config
db routes.rb
lib
log
public
script
test
tmp
vendor

13. Lesson2

15. Lesson