Tweetモデルを生成

$ rails generate scaffold Tweet body:string
      invoke  active_record
      create    db/migrate/20130913002831_create_tweets.rb
      create    app/models/tweet.rb
      invoke  resource_route
       route    resources :tweets
      invoke  scaffold_controller
      create    app/controllers/tweets_controller.rb
      invoke    erb
      create      app/views/tweets
      create      app/views/tweets/index.html.erb
      create      app/views/tweets/edit.html.erb
      create      app/views/tweets/show.html.erb
      create      app/views/tweets/new.html.erb
      create      app/views/tweets/_form.html.erb
      invoke    helper
      create      app/helpers/tweets_helper.rb
      invoke    jbuilder
      create      app/views/tweets/index.json.jbuilder
      create      app/views/tweets/show.json.jbuilder
      invoke  assets
      invoke    coffee
      create      app/assets/javascripts/tweets.js.coffee
      invoke    scss
      create      app/assets/stylesheets/tweets.css.scss
      invoke  scss
      create    app/assets/stylesheets/scaffolds.css.scss