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Creating a Rails Application #
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You're new to Rails and would like to create an application.
 
1. Generating the starting app
 
  $ rails demo
  $ cd demo
  $ ls -p
    README config/ lib/ script/ vendor/ Rakefile db/ log/ test/ app/ doc/ public/ tmp/
 
2. Creating a controller
 
  $ script/generate controller Say
 
  This will generate several files. The file app/controllers/say_controller.rb is what we want at this point.
 
3. Creating an action
 
  In app/controllers/say_controller.rb:
 
  class SayController < ApplicationController
    def hello
    end
  end
 
4. Starting the server
 
  $ script/server
 
5. URL
 
  http://localhost:3000/demo/say/hello
 
  where
    http://        is the protocol
    localhost:3000 is the server and the port
    demo           is the app
    say            is the controller
    hello          is the action
 
6. HTML template
 
  In app/views/say/hello.html.erb
 
  <html> 
    <head> 
      <title>Hello</title> 
    </head> 
    <body> 
      <h1>Hello</h1> 
    </body> 
  </html>
 
See Also:
 
 1. Agile Web Development with Rails, 3rd ed. (Chapter 4)