Ruby on Rails 2.0入門：Flickerベースのアプリケーションの作成

gem install rails --include-dependencies

$ sudo gem update actionmailer actionpack activerecord activesupport
$ sudo gem install activeresource
$ sudo gem update rails
$ ruby -v
ruby 1.8.6 (2007-09-24 patchlevel 111) [universal-darwin9.0]
$ gem -v
1.0.1
$ rails -v
Rails 2.0.2
$ gem list --local

*** LOCAL GEMS ***

actionmailer (2.0.2, 1.3.6, 1.3.3)
actionpack (2.0.2, 1.13.6, 1.13.3)
actionwebservice (1.2.6, 1.2.3)
activerecord (2.0.2, 1.15.6, 1.15.3)
activeresource (2.0.2)
activesupport (2.0.2, 1.4.4, 1.4.2)
rails (2.0.2, 1.2.6, 1.2.3)
... other libraries here ...

rails testapp
cd testapp/
script/server 

class PhotosController < ApplicationController
  # GET /photos
  # GET /photos.xml
  def index
    @photos = # load photos from Flickr

    respond_to do |format|
      format.html # index.html.erb
      format.xml  { render :xml => @photos }
    end
  end
end

class PhotosController < ApplicationController
  # ... omissis ...

  # GET /photos/1.jpg
  def show
    @photo = Photo.find(params[:id])

    respond_to do |format|
      format.jpg
    end
  end
end

<%= @photo.image_data %>

# Bind jpeg mime-type to the format.jpg format
Mime::Type.register_alias "image/jpeg", :jpg
# Bind the richtext mime-type to the format.rtf format
Mime::Type.register "text/richtext", :rtf
# Bind an additional formatter to the html mime-type, to be used
# for mobile devices with a limited display
Mime::Type.register_alias "text/html", :mobile

class PhotosController < ApplicationController
  before_filter :detect_mobile_device

  def index
    @photos = # load photos from Flickr

    respond_to do |format|
      format.html   # index.html.erb
      format.mobile # index.mobile.erb
    end
  end

  ... omissis ...
  def detect_mobile_device
    if request.env['HTTP_USER_AGENT'] &&
      request.env['HTTP_USER_AGENT'][/BlackBerry/]
      request.format = :mobile
    end
  end
end

ActionController::Routing::Routes.draw do |map|
  map.resources :photos
  map.resources :photosets
  map.resources :flickr_users

  # default mapping
  map.connect ':controller/:action/:id'
  map.connect ':controller/:action/:id.:format'
end

ActionController::Routing::Routes.draw do |map|
  map.resources :flickr_users
  map.resources :flickr_users, :has_many => :photosets   
  map.resources :photosets, :has_many => :photos

  # default mapping
  map.connect ':controller/:action/:id'
  map.connect ':controller/:action/:id.:format'
end

class PhotosetsController < ApplicationController
  before_filter :load_user
  
  # Given a sample url like site.com/flickr_user/max/photosets ,
  # params[:flickr_user_id] automagically points to 'max'
  def load_user   
    @flickr_user = FlickrUser.find(params[:flickr_user_id])
  end
  
  # GET /photosets
  def index
    @photosets = Photoset.by_user(@flickr_user)[0..50]

    respond_to do |format|
      format.html # index.html.erb
    end
  end
end

<%= javascript_include_tag 
    "prototype" , "effects" , "dragdrop" , "instant" , "reflex" , 
    :cache => "railtrackr" %>
<!-- Will create a single railtrackr.js file -->

ActionController::Base.asset_host = "static%d.yoursite.com"