template script to demo jQuery in Rails3

Gemfile

# Gemfile
source :gemcutter

gem 'rails', '3.0.0.beta3'

mk174.rb

### Rails install template
## add to the -m switch of your rails <myapp> generator


# rails -J == skip prototype files... then supply 'rails.js' from 'jquery-ujs'

  commit = "59dd91d945570391f905b1e40444e5921dbc2b8f"
  get "http://github.com/rails/jquery-ujs/raw/#{commit}/src/rails.js",  'public/javascripts/rails.js'
  
  # not sure what they are planning for this,  There is a JS named 'rails' that provides
  # the interfacing of the JS to rails.  There are two projects in rails at github.
  # prototype-ujs and jquery-ujs, both of which provide this rails.js file

  def scaffold
    "scaffold"
#     "nifty:scaffold"
  end
  
FileUtils.rm_f %w{
  README
    public/index.html
    public/robots.txt
  }


  application do %q{
    config.generators do |g|
#       g.template_engine   :haml
#       g.test_framework    :rspec
    end
    }
  end

  append_file 'Gemfile', <<-GEMFILE
gem   'nifty-generators',   '0.4.0'
gem   'will_paginate',      '3.0.pre'         # include r3 compatable will_paginate
GEMFILE


  # how do I run and check the return codes?
  check = run 'bundle check'
  check = run 'bundle install'  unless check =~ /satisfied/
  puts check


  # nifty:layout will generate layouts/application.html.*
  # but rails just did it, so we should force it?
  FileUtils.rm 'app/views/layouts/application.html.erb'
  generate 'nifty:layout',  ''     +'--jQuery'

    # replace :defaults with these js files as needed for jQuery.
    # TODO backpatch this into nifty generator
jQuery_js = %w[
  'http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js'
  'rails'
  'application'
].join ', '
  gsub_file 'app/views/layouts/application.html.erb',
    /<%= javascript_include_tag :defaults %>/,
    "<%= javascript_include_tag #{jQuery_js} %>"


  
  git   :init
  git   :add => '.',  :commit => %q{-am 'Initial commit'}

# ---------------------------------------------------------------
  puts  '--- generating scaffolding for STORE application 174 ---'
  
    generate scaffold,   "categories",      
      "name:string"
    
    generate scaffold,    "products",
      "category:belongs_to",
      "name:string",
      "price:decimal",
      "description:text"

    route   %q{root :to => 'products#index'}
    
      # not to use _into_class here.
    inject_into_file  'app/models/category.rb', <<-RUBY, :after => /^class Category.*\n/
  has_many :products
    RUBY

    # add pagination to products.
  gsub_file 'app/controllers/products_controller.rb',
      /@products = Product.all/,
    %q/@products = Product.paginate(:per_page => 10, :page => params[:page])/


  ## must also insert a line for the .js responder in the respond_to block!
  ## because the given block specifies .xml ...
  gsub_file 'app/controllers/products_controller.rb',
      /format.html # index.html.erb/,
    %q/format.html # index.html.erb,
      format.js   # index.html.js/
    
  
  # didn't generate a select for the category?      # TODO backpatch view generators
  gsub_file 'app/views/products/_form.html.erb',
    %q/<%= f.text_field :category %>/,
    %q/<%= f.collection_select :category_id, Category.all, :id, :name %>/

    # back ref for categories in the product show.
  gsub_file 'app/views/products/show.html.erb',
    %q/<%= @product.category %>/,
    %q/<%= link_to h(@product.category.name), @product.category %>/


  # refactor this view to include pagination script, and partial
  create_file 'app/views/products/index.html.erb', <<-ERB, :force => true
<% title "Products" %>
<% javascript "pagination" %>
<div id="products">
  <%= render 'products' %>
</div>
<p><%= link_to "New Product", new_product_path %></p>
  ERB

  # partial view as refenced above
  create_file 'app/views/products/_products.html.erb', <<-ERB
<%= will_paginate @products %>

<% for product in @products %>
  <div class="product">
    <h3>
      <%= link_to h(product.name), product %>
      <%= number_to_currency(product.price) %>
    </h3>
    <!--
    <div class="actions">
      <%= link_to "Edit", edit_product_path(product) %> |
      <%= link_to "Destroy", product, :confirm => 'Are you sure?', :method => :delete %>
    </div>
    -->
  </div>
<% end %>

<%= will_paginate @products %>
  ERB


  file 'public/javascripts/pagination.js', <<-jQuery
$(function() {
  $(".pagination a").live("click", function() {
    $(".pagination").html("Page is loading...");
    $.get(this.href, null, null, "script");
    return false;
  });
});
    jQuery

    file 'app/views/products/index.js.erb', <<-ERB
$("#products").html("<%= escape_javascript(render("products")) %>");
ERB


    # copy Ryan's rake setup script

  file 'lib/tasks/application.rake', <<-RAKE
desc "Setup all for app"
task :setup => ['db:migrate', 'load:categories', 'load:products']

namespace :load do
  desc "Load categories into database"
  task :categories do
    Category.delete_all
    ['Electronics', 'Office Supplies', 'Toys', 'Clothing', 'Groceries'].each do |name|
      Category.create!(:name => name)
    end
  end

  desc "Load products into database"
  task :products do
    Product.delete_all
    categories = Category.all
    words = File.readlines("/usr/share/dict/words").sort_by { rand }
    lorem = "Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum."
    200.times do
      Product.create!(:name => words.pop.strip.titleize, :category => categories.rand, :description => lorem, :price => [4.99, 9.99, 14.99, 19.99, 29.99].rand)
    end
  end
end
  RAKE

  rake 'setup'