Set up Ruby


Install Ruby for Windows

My Env

  • Windows 7 x64
  • Ruby 2.0

Download from Web

In windows, RubyInstaller is available, this is easy to install Ruby.
After downloading, just click rubyinstaller-x.x-pxxx.exe(in case of x64, please select x64)



Check second, add PATH is useful for usCool.


Check whether the installation succeeds or not
Open command prompt(cmd.exe)

ruby -v

Ruby version shows up.
Let’s start Ruby programming.

Install Rails for Windows

Install Devkit

Rails require Devkit and its PATH
Devkit is toolset. Maybe, create folder under c:\Devikit and extract Devkit-sxf.exe under it
And this path to PATH

Install Devkit

Go Devkit folder and type
This is initialization

ruby dk.rb init

Next is install

ruby dk.rb install

Skip install doc

Add some setting for gem.
By default, gem installs all documentation. That takes a lot of time.:x
To skip install doc, create .gemrc file under c:Users\<username>(Windows 7)

install: --no-ri --no-rdoc
update: --no-ri --no-rdoc

Ruby reads this file and set gem setting

Install Rails using gem

Type following command under cmd.exe

gem install rails

If there are no error, works fine.



rails -v

Rails version should be shown

First Rails Applicatio

In my opinion, please create new folder for Rails

Create new application

rails new applicationname

applicationname is your application name.(No rules)
rails new command create Rails Application set(files)

※If you want to use mysql(Default database is sqlite3, which is installed under Ruby)
Type this

rails new applicationname -d mysql

Start Application

Go Application folder and type

rails s

Ruby has WEBrick server for development. This command invokes WEBRick server
By default, port is 3000


Access http://localhost:3000


※If you use x64 version, sqlite3 error has occured
By default rails use 32bit sqlite3 version by default
Please open Gemfile.lock and edit
1.3.8 is your version in Ruby

To fix, installation version(require gems) Try it!

bundle install

Stop Rails Application

Ctrl + S

Rails with Eclipse

Install Eclipse and Install Aptana

Install Eclipse is very straight.
Next is Aptana. Aptana is web development useful plugin(Rails, Python, PHP, JavaScript).
“Help” -> “Install New Software”

Access Aptana web site and find Aptana plugin URL

Add new repository and type URL

Start install and restart eclipse

Create new Application

Let’s make new application from Eclipse
“File” -> “Others” -> “Rails Project”
eclipse rails

After that, input Project name and location setting.

Rails new command starts automatically, and create new Rails Application.
At the bottom, Rails console opens and you can input rails command in here.