RoR: Ruby on Rails
2009.Apr.14
Eric

Agenda
• About RoR
• MVC
• Implement a simple web post board
• Important source code
• Conclusion

About RoR
• Based on “Ruby Programming Language”
• A framework for “Agile Development”

MVC
Model-View-Controller

Implement
• Before you start the implement, you have
to make sure your system environment is
readay!
• Ruby 1.8.6
• Rails > 2.2
• MySQL >5.0

1.Create the project
> rails post
Generating project files

2. Select Database Type
>rails post -d <type>
mysql sqlite3 postgreSQL
Write the variables to
database.yml

3. Configure a Database
~> cd post
post> nano config/database.yml

4. Create database
> rake db:create
Connect to database
Check the result
Create successfully!

5. Generate Controller
> script/generate controller home index
Generate controller files automatically

Test the Server
> script/server
http://127.0.0.1:3000/home/index
Text
Default Index

6. Setting the Homepage
remove default index
Edit config/routes.rb
Add this argument

7. Scaffold
script/generate scaffold Post name:string title:string content:text
views
views including layout
models

8.Migrate
> rake db:migrate
Check the database
Tables of database
Fields in table

9. Done
app/views/home/index.html.erb
use the “link_to” method
New index page
After click
Add a post

10.Test
Post Successful
New Back to list
(show)
Database Status
Edit

Important Source Code

Database
Fields Schema
Support version control

Interface
Index page Show post
New post
Just using html and erb generate the view

Operate
index update
show
delete
create

Conclusion
• Really agile
• Database independent
• The possibility of Ajax
• Implement the web service