Over a million developers have joined DZone.

Getting Started with Rails 2.0 Scaffold

DZone 's Guide to

Getting Started with Rails 2.0 Scaffold

· Java Zone ·
Free Resource
Rails 2.0 changes the way Scaffold works. This blog walks you through the steps to create a simple CRUD application using Scaffold in Rails 2.0.
  1. Download & Install JRuby 1.1 RC2.
  2. Install Rails using the following command:

    jruby -S gem install rails
  3. Create a new Rails app using the following command:

    cd samples; mkdir rails; cd rails
    jruby -S rails books -d mysql
  4. Start MySQL server in a different shell using the following command:

    sudo /usr/local/mysql/bin/mysqld_safe --console
  5. Creat the database using the following command:

    cd books
    jruby -S rake db:create

    This creates the database defined by RAILS_ENV (Development is default). Here are some other new database-related commands:

    db:create:all Create all the databases (_Development, _Test, _Production)
    db:drop Drops your database
    db:reset Drop and Re-create your database, including migrations
  6. Generate a scaffold using the following command:

    jruby script/generate scaffold book title:string author:string isbn:string description:text

    The output of the command looks like:
     exists app/models/
    exists app/controllers/
    exists app/helpers/
    create app/views/books
    exists app/views/layouts/
    exists test/functional/
    exists test/unit/
    create app/views/books/index.html.erb
    create app/views/books/show.html.erb
    create app/views/books/new.html.erb
    create app/views/books/edit.html.erb
    create app/views/layouts/books.html.erb
    create public/stylesheets/scaffold.css
    dependency model
    exists app/models/
    exists test/unit/
    exists test/fixtures/
    create app/models/book.rb
    create test/unit/book_test.rb
    create test/fixtures/books.yml
    create db/migrate
    create db/migrate/001_create_books.rb
    create app/controllers/books_controller.rb
    create test/functional/books_controller_test.rb
    create app/helpers/books_helper.rb
    route map.resources :books

    There is no need to create the model explicitly as was the case in previous version of Rails. This creates the "db/migrate/001_create_books.rb" migration which looks like
    class CreateBooks < ActiveRecord::Migration
    def self.up
    create_table :books do |t|
    t.string :title
    t.string :author
    t.string :isbn
    t.text :description


    def self.down
    drop_table :books
  7. Create the database tables using the following command:

    jruby -S rake db:migrate
  8. Deploy the application on WEBrick using the following command:

    jruby script/server

    The application is now available at "http://localhost:3000/books" and looks like:

    Rails2 CRUD Blank Page
  9. Click on "New book" to see a page as shown below (with values entered):

    Rails2 CRUD New Entry
    Click on Create button. After 2 entries have been entered, it looks like as shown below:

    Rails 2 CRUD Multiple Entries
That's it, you've created a simple Rails 2.0 CRUD application.

You can also deploy this application easily on GlassFish v3 gem. Just follow the instructions here and enjoy!

I'll post a follow up blog where this is much more simplifed using NetBeans 6.1 builds where JRuby 1.1 and Rails 2.0.2 are already integrated.


Published at DZone with permission of

Opinions expressed by DZone contributors are their own.

{{ parent.title || parent.header.title}}

{{ parent.tldr }}

{{ parent.urlSource.name }}