adding episode 253

episode-253/README

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+Railscasts Episode #253: CarrierWave File Uploads
+
+http://railscasts.com/episodes/253
+
+Commands
+
+  bundle
+  rails g uploader image
+  rails g migration add_image_to_paintings image:string
+  rake db:migrate

episode-253/picturesque/.gitignore

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+.bundle
+db/*.sqlite3
+log/*.log
+tmp/**/*
+public/uploads

episode-253/picturesque/Gemfile

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+source 'http://rubygems.org'
+
+gem 'rails', '3.0.3'
+gem 'sqlite3-ruby', '1.2.5', :require => 'sqlite3'
+gem 'nifty-generators'
+gem 'mocha', :group => :test
+
+gem "rmagick"
+gem "carrierwave"

episode-253/picturesque/Gemfile.lock

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+GEM
+  remote: http://rubygems.org/
+  specs:
+    abstract (1.0.0)
+    actionmailer (3.0.3)
+      actionpack (= 3.0.3)
+      mail (~> 2.2.9)
+    actionpack (3.0.3)
+      activemodel (= 3.0.3)
+      activesupport (= 3.0.3)
+      builder (~> 2.1.2)
+      erubis (~> 2.6.6)
+      i18n (~> 0.4)
+      rack (~> 1.2.1)
+      rack-mount (~> 0.6.13)
+      rack-test (~> 0.5.6)
+      tzinfo (~> 0.3.23)
+    activemodel (3.0.3)
+      activesupport (= 3.0.3)
+      builder (~> 2.1.2)
+      i18n (~> 0.4)
+    activerecord (3.0.3)
+      activemodel (= 3.0.3)
+      activesupport (= 3.0.3)
+      arel (~> 2.0.2)
+      tzinfo (~> 0.3.23)
+    activeresource (3.0.3)
+      activemodel (= 3.0.3)
+      activesupport (= 3.0.3)
+    activesupport (3.0.3)
+    arel (2.0.8)
+    builder (2.1.2)
+    carrierwave (0.5.1)
+      activesupport (~> 3.0)
+    erubis (2.6.6)
+      abstract (>= 1.0.0)
+    i18n (0.5.0)
+    mail (2.2.15)
+      activesupport (>= 2.3.6)
+      i18n (>= 0.4.0)
+      mime-types (~> 1.16)
+      treetop (~> 1.4.8)
+    mime-types (1.16)
+    mocha (0.9.10)
+      rake
+    nifty-generators (0.4.4)
+    polyglot (0.3.1)
+    rack (1.2.1)
+    rack-mount (0.6.13)
+      rack (>= 1.0.0)
+    rack-test (0.5.7)
+      rack (>= 1.0)
+    rails (3.0.3)
+      actionmailer (= 3.0.3)
+      actionpack (= 3.0.3)
+      activerecord (= 3.0.3)
+      activeresource (= 3.0.3)
+      activesupport (= 3.0.3)
+      bundler (~> 1.0)
+      railties (= 3.0.3)
+    railties (3.0.3)
+      actionpack (= 3.0.3)
+      activesupport (= 3.0.3)
+      rake (>= 0.8.7)
+      thor (~> 0.14.4)
+    rake (0.8.7)
+    rmagick (2.13.1)
+    sqlite3-ruby (1.2.5)
+    thor (0.14.6)
+    treetop (1.4.9)
+      polyglot (>= 0.3.1)
+    tzinfo (0.3.24)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  carrierwave
+  mocha
+  nifty-generators
+  rails (= 3.0.3)
+  rmagick
+  sqlite3-ruby (= 1.2.5)

episode-253/picturesque/Rakefile

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+# Add your own tasks in files placed in lib/tasks ending in .rake,
+# for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
+
+require File.expand_path('../config/application', __FILE__)
+require 'rake'
+
+Picturesque::Application.load_tasks

episode-253/picturesque/app/controllers/application_controller.rb

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+class ApplicationController < ActionController::Base
+  protect_from_forgery
+end

episode-253/picturesque/app/controllers/galleries_controller.rb

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+class GalleriesController < ApplicationController
+  def index
+    @galleries = Gallery.all
+  end
+
+  def show
+    @gallery = Gallery.find(params[:id])
+  end
+
+  def new
+    @gallery = Gallery.new
+  end
+
+  def create
+    @gallery = Gallery.new(params[:gallery])
+    if @gallery.save
+      flash[:notice] = "Successfully created gallery."
+      redirect_to @gallery
+    else
+      render :action => 'new'
+    end
+  end
+
+  def edit
+    @gallery = Gallery.find(params[:id])
+  end
+
+  def update
+    @gallery = Gallery.find(params[:id])
+    if @gallery.update_attributes(params[:gallery])
+      flash[:notice] = "Successfully updated gallery."
+      redirect_to gallery_url
+    else
+      render :action => 'edit'
+    end
+  end
+
+  def destroy
+    @gallery = Gallery.find(params[:id])
+    @gallery.destroy
+    flash[:notice] = "Successfully destroyed gallery."
+    redirect_to galleries_url
+  end
+end

episode-253/picturesque/app/controllers/paintings_controller.rb

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+class PaintingsController < ApplicationController
+  def new
+    @painting = Painting.new(:gallery_id => params[:gallery_id])
+  end
+
+  def create
+    @painting = Painting.new(params[:painting])
+    if @painting.save
+      flash[:notice] = "Successfully created painting."
+      redirect_to @painting.gallery
+    else
+      render :action => 'new'
+    end
+  end
+
+  def edit
+    @painting = Painting.find(params[:id])
+  end
+
+  def update
+    @painting = Painting.find(params[:id])
+    if @painting.update_attributes(params[:painting])
+      flash[:notice] = "Successfully updated painting."
+      redirect_to @painting.gallery
+    else
+      render :action => 'edit'
+    end
+  end
+
+  def destroy
+    @painting = Painting.find(params[:id])
+    @painting.destroy
+    flash[:notice] = "Successfully destroyed painting."
+    redirect_to @painting.gallery
+  end
+end

episode-253/picturesque/app/helpers/application_helper.rb

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+module ApplicationHelper
+end

episode-253/picturesque/app/helpers/error_messages_helper.rb

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+module ErrorMessagesHelper
+  # Render error messages for the given objects. The :message and :header_message options are allowed.
+  def error_messages_for(*objects)
+    options = objects.extract_options!
+    options[:header_message] ||= "Invalid Fields"
+    options[:message] ||= "Correct the following errors and try again."
+    messages = objects.compact.map { |o| o.errors.full_messages }.flatten
+    unless messages.empty?
+      content_tag(:div, :class => "error_messages") do
+        list_items = messages.map { |msg| content_tag(:li, msg) }
+        content_tag(:h2, options[:header_message]) + content_tag(:p, options[:message]) + content_tag(:ul, list_items.join.html_safe)
+      end
+    end
+  end
+
+  module FormBuilderAdditions
+    def error_messages(options = {})
+      @template.error_messages_for(@object, options)
+    end
+  end
+end
+
+ActionView::Helpers::FormBuilder.send(:include, ErrorMessagesHelper::FormBuilderAdditions)

episode-253/picturesque/app/helpers/galleries_helper.rb

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+module GalleriesHelper
+end

episode-253/picturesque/app/helpers/layout_helper.rb

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+# These helper methods can be called in your template to set variables to be used in the layout
+# This module should be included in all views globally,
+# to do so you may need to add this line to your ApplicationController
+#   helper :layout
+module LayoutHelper
+  def title(page_title, show_title = true)
+    content_for(:title) { h(page_title.to_s) }
+    @show_title = show_title
+  end
+
+  def show_title?
+    @show_title
+  end
+
+  def stylesheet(*args)
+    content_for(:head) { stylesheet_link_tag(*args) }
+  end
+
+  def javascript(*args)
+    content_for(:head) { javascript_include_tag(*args) }
+  end
+end

episode-253/picturesque/app/helpers/paintings_helper.rb

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+module PaintingsHelper
+end

episode-253/picturesque/app/models/gallery.rb

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+class Gallery < ActiveRecord::Base
+  attr_accessible :name
+  has_many :paintings
+end

episode-253/picturesque/app/models/painting.rb

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+class Painting < ActiveRecord::Base
+  attr_accessible :gallery_id, :name, :image, :remote_image_url
+  belongs_to :gallery
+  mount_uploader :image, ImageUploader
+end

episode-253/picturesque/app/uploaders/image_uploader.rb

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+# encoding: utf-8
+
+class ImageUploader < CarrierWave::Uploader::Base
+
+  # Include RMagick or ImageScience support:
+  include CarrierWave::RMagick
+  # include CarrierWave::ImageScience
+
+  # Choose what kind of storage to use for this uploader:
+  storage :file
+  # storage :s3
+
+  # Override the directory where uploaded files will be stored.
+  # This is a sensible default for uploaders that are meant to be mounted:
+  def store_dir
+    "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
+  end
+
+  # Provide a default URL as a default if there hasn't been a file uploaded:
+  # def default_url
+  #   "/images/fallback/" + [version_name, "default.png"].compact.join('_')
+  # end
+
+  # Process files as they are uploaded:
+  # process :scale => [200, 300]
+  #
+  # def scale(width, height)
+  #   # do something
+  # end
+
+  # Create different versions of your uploaded files:
+  version :thumb do
+    process :resize_to_limit => [200, 200]
+  end
+
+  # Add a white list of extensions which are allowed to be uploaded.
+  # For images you might use something like this:
+  # def extension_white_list
+  #   %w(jpg jpeg gif png)
+  # end
+
+  # Override the filename of the uploaded files:
+  # def filename
+  #   "something.jpg" if original_filename
+  # end
+
+end

episode-253/picturesque/app/views/galleries/_form.html.erb

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+<%= form_for @gallery do |f| %>
+  <%= f.error_messages %>
+  <p>
+    <%= f.label :name %><br />
+    <%= f.text_field :name %>
+  </p>
+  <p><%= f.submit %></p>
+<% end %>

episode-253/picturesque/app/views/galleries/edit.html.erb

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+<% title "Edit Gallery" %>
+
+<%= render 'form' %>
+
+<p>
+  <%= link_to "Show", @gallery %> |
+  <%= link_to "View All", galleries_path %>
+</p>

episode-253/picturesque/app/views/galleries/index.html.erb

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+<% title "Galleries" %>
+
+<% for gallery in @galleries %>
+  <div class="gallery">
+    <h2><%= link_to gallery.name, gallery %></h2>
+    Paintings: <%= gallery.paintings.size %>
+  </div>
+<% end %>
+
+<p><%= link_to "New Gallery", new_gallery_path %></p>

episode-253/picturesque/app/views/galleries/new.html.erb

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+<% title "New Gallery" %>
+
+<%= render 'form' %>
+
+<p><%= link_to "Back to List", galleries_path %></p>

episode-253/picturesque/app/views/galleries/show.html.erb

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+<% title @gallery.name %>
+
+<div id="paintings">
+  <% for painting in @gallery.paintings %>
+    <div class="painting">
+      <%= image_tag painting.image_url(:thumb) if painting.image? %>
+      <div class="name"><%= painting.name %></div>
+      <div class="actions">
+        <%= link_to "edit", edit_painting_path(painting) %> |
+        <%= link_to "remove", painting, :confirm => 'Are you sure?', :method => :delete %>
+      </div>
+    </div>
+  <% end %>
+  <div class="clear"></div>
+</div>
+
+<p>
+  <%= link_to "Add a Painting", new_painting_path(:gallery_id => @gallery) %> |
+  <%= link_to "Remove Gallery", @gallery, :confirm => 'Are you sure?', :method => :delete %> |
+  <%= link_to "View Galleries", galleries_path %>
+</p>

episode-253/picturesque/app/views/layouts/application.html.erb

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+<!DOCTYPE html>
+<html>
+  <head>
+    <title><%= content_for?(:title) ? yield(:title) : "Untitled" %></title>
+    <%= stylesheet_link_tag "application" %>
+    <%= javascript_include_tag :defaults %>
+    <%= csrf_meta_tag %>
+    <%= yield(:head) %>
+  </head>
+  <body>
+    <div id="container">
+      <% flash.each do |name, msg| %>
+        <%= content_tag :div, msg, :id => "flash_#{name}" %>
+      <% end %>
+      <%= content_tag :h1, yield(:title) if show_title? %>
+      <%= yield %>
+    </div>
+  </body>
+</html>