#049 on Rails 3
Features and demonstration of Rails 3.
Notes
Key Features of Rails 3
- Brand new router with an emphasis on RESTful declarations
- New Action Mailer API modeled after Action Controller (now without the agonizing pain of sending multipart messages!)
- New Active Record chainable query language built on top of relational algebra
- Unobtrusive JavaScript helpers with drivers for Prototype, jQuery, and more coming (end of inline JS)
- Explicit dependency management with Bundler
Checking Pre-requisites and Installation
$ ruby -v
ruby 2.1.9p490 (2016-03-30 revision 54437) [x86_64-darwin14.0]
$ sqlite3 --version
3.19.3 2017-06-27 16:48:08 2b0954060fe10d6de6d479287dd88890f1bef6cc1beca11bc6cdb79f72e2377b
$ gem install rails -v 3.2.22.5
...
$ rails --version
Rails 3.2.22.5
Creating a Simple App
$ rails new minime3
...
$ cd minime3
$ rake db:migrate
$ rails server
=> Booting WEBrick
=> Rails 3.2.22.5 application starting in development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
[2019-02-25 15:01:01] INFO WEBrick 1.3.1
[2019-02-25 15:01:01] INFO ruby 2.1.9 (2016-03-30) [x86_64-darwin14.0]
[2019-02-25 15:01:01] INFO WEBrick::HTTPServer#start: pid=97453 port=3000
Note, pegged some gems to avoid version issues:
- sqlite3
- rb-fsevent, rb-inotify
Hit http://localhost:3000..
Adding a Welcome Page
Using controller generator:
rails generate controller Welcome index
Adjust routes to use this as the main page.
Testing
$ rake test
... lots of: warning: File.exists? is a deprecated name, use File.exist? instead
Run options:
# Running tests:
Finished tests in 0.141508s, 7.0667 tests/s, 7.0667 assertions/s.
1 tests, 1 assertions, 0 failures, 0 errors, 0 skips
ruby -v: ruby 2.1.9p490 (2016-03-30 revision 54437) [x86_64-darwin14.0]
Adding The Blog App
The getting started guide has always outlined a simple blog application.
Adding the basic features to minime3:
rails generate controller Articles
rails generate model Article title:string text:text
rake db:migrate