Rails3はじめ

Rails

WEB+DB PRESS vol.58(2010)の特集参照。

前提インストール

>ruby -v
ruby 1.9.2p0 (2010-08-18) [i386-mingw32]
>gem -v
1.3.7
>git --version
git version 1.7.3.1.msysgit.0

railsインストール

>gem i rails
Successfully installed activesupport-3.0.3
Successfully installed builder-2.1.2
…

railsアプリ作成

>rails new blog_app
      create
      create  README
      …
>cd blog_app

gitによるバージョン管理

blog_app>git init
Initialized empty Git repository in D:/XXX/blog_app/.git/
blog_app>git add -A
warning: LF will be replaced by CRLF in .gitignore.
The file will have its original line endings in your working directory.
…
blog_app>git commit -m "rails new blog_app"
[master (root-commit) cb2bc36] rails new blog_app
 Committer: unknown 
…

scaffold

blog_app>rails g scaffold post title:string body:text
Could not find gem 'sqlite3-ruby (>= 0, runtime)' in any of the gem sources lis
ed in your Gemfile.
Try running `bundle install`.
blog_app>bundle install
Fetching source index for http://rubygems.org/
Using rake (0.8.7)
Using abstract (1.0.0)
…
Using rails (3.0.3)
Installing sqlite3-ruby (1.3.2)
Your bundle is complete! Use `bundle show [gemname]` to see where a bundled gem
is installed.
blog_app>rails g scaffold post title:string body:text
      invoke  active_record
      create    db/migrate/20101204105343_create_posts.rb
      …
      invoke  stylesheets
      create    public/stylesheets/scaffold.css

データベースの作成

blog_app>rake db:migrate
(in D:/XXX/blog_app)
==  CreatePosts: migrating ====================================================
   create_table(:posts)
   -> 0.0156s
==  CreatePosts: migrated (0.0156s) ===========================================

テストの実行

blog_app>rake
(in D:/XXX/blog_app)
Loaded suite D:/home/bin/Ruby192/lib/ruby/1.9.1/rake/rake_test_loader
Started
.
Finished in 2.046875 seconds.

1 tests, 1 assertions, 0 failures, 0 errors, 0 skips

Test run options: --seed 61845
Loaded suite D:/home/bin/Ruby192/lib/ruby/1.9.1/rake/rake_test_loader
Started
.......
Finished in 3.093750 seconds.

7 tests, 10 assertions, 0 failures, 0 errors, 0 skips

Test run options: --seed 3821

アプリケーションの実行

blog_app>rails s
=> Booting WEBrick
=> Rails 3.0.3 application starting in development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
[2010-12-04 20:01:18] INFO  WEBrick 1.3.1
[2010-12-04 20:01:18] INFO  ruby 1.9.2 (2010-08-18) [i386-mingw32]
[2010-12-04 20:01:19] INFO  WEBrick::HTTPServer#start: pid=4124 port=3000