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adding episode 229
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ryanb committed Aug 30, 2010
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8 changes: 8 additions & 0 deletions episode-229/README
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Railscasts Episode #229: Polling for Changes

http://railscasts.com/episodes/229

Commands

bundle install
rails g jquery:install
4 changes: 4 additions & 0 deletions episode-229/blog/.gitignore
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.bundle
db/*.sqlite3
log/*.log
tmp/**/*
6 changes: 6 additions & 0 deletions episode-229/blog/Gemfile
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source 'http://rubygems.org'

gem 'rails', '3.0.0'
gem 'sqlite3-ruby', '1.2.5', :require => 'sqlite3'
gem 'nifty-generators'
gem 'jquery-rails'
78 changes: 78 additions & 0 deletions episode-229/blog/Gemfile.lock
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GEM
remote: http://rubygems.org/
specs:
abstract (1.0.0)
actionmailer (3.0.0)
actionpack (= 3.0.0)
mail (~> 2.2.5)
actionpack (3.0.0)
activemodel (= 3.0.0)
activesupport (= 3.0.0)
builder (~> 2.1.2)
erubis (~> 2.6.6)
i18n (~> 0.4.1)
rack (~> 1.2.1)
rack-mount (~> 0.6.12)
rack-test (~> 0.5.4)
tzinfo (~> 0.3.23)
activemodel (3.0.0)
activesupport (= 3.0.0)
builder (~> 2.1.2)
i18n (~> 0.4.1)
activerecord (3.0.0)
activemodel (= 3.0.0)
activesupport (= 3.0.0)
arel (~> 1.0.0)
tzinfo (~> 0.3.23)
activeresource (3.0.0)
activemodel (= 3.0.0)
activesupport (= 3.0.0)
activesupport (3.0.0)
arel (1.0.1)
activesupport (~> 3.0.0)
builder (2.1.2)
erubis (2.6.6)
abstract (>= 1.0.0)
i18n (0.4.1)
jquery-rails (0.1.2)
rails (~> 3.0.0.rc)
mail (2.2.5)
activesupport (>= 2.3.6)
mime-types
treetop (>= 1.4.5)
mime-types (1.16)
nifty-generators (0.4.0)
polyglot (0.3.1)
rack (1.2.1)
rack-mount (0.6.12)
rack (>= 1.0.0)
rack-test (0.5.4)
rack (>= 1.0)
rails (3.0.0)
actionmailer (= 3.0.0)
actionpack (= 3.0.0)
activerecord (= 3.0.0)
activeresource (= 3.0.0)
activesupport (= 3.0.0)
bundler (~> 1.0.0)
railties (= 3.0.0)
railties (3.0.0)
actionpack (= 3.0.0)
activesupport (= 3.0.0)
rake (>= 0.8.4)
thor (~> 0.14.0)
rake (0.8.7)
sqlite3-ruby (1.2.5)
thor (0.14.0)
treetop (1.4.8)
polyglot (>= 0.3.1)
tzinfo (0.3.23)

PLATFORMS
ruby

DEPENDENCIES
jquery-rails
nifty-generators
rails (= 3.0.0)
sqlite3-ruby (= 1.2.5)
1 change: 1 addition & 0 deletions episode-229/blog/README
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Example Railscasts Application
7 changes: 7 additions & 0 deletions episode-229/blog/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'

Blog::Application.load_tasks
3 changes: 3 additions & 0 deletions episode-229/blog/app/controllers/application_controller.rb
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class ApplicationController < ActionController::Base
protect_from_forgery
end
45 changes: 45 additions & 0 deletions episode-229/blog/app/controllers/articles_controller.rb
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class ArticlesController < ApplicationController
def index
@articles = Article.all
end

def show
@article = Article.find(params[:id])
@comment = Comment.new(:article_id => @article.id)
end

def new
@article = Article.new
end

def create
@article = Article.new(params[:article])
if @article.save
flash[:notice] = "Successfully created article."
redirect_to @article
else
render :action => 'new'
end
end

def edit
@article = Article.find(params[:id])
end

def update
@article = Article.find(params[:id])
if @article.update_attributes(params[:article])
flash[:notice] = "Successfully updated article."
redirect_to @article
else
render :action => 'edit'
end
end

def destroy
@article = Article.find(params[:id])
@article.destroy
flash[:notice] = "Successfully destroyed article."
redirect_to articles_url
end
end
19 changes: 19 additions & 0 deletions episode-229/blog/app/controllers/comments_controller.rb
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class CommentsController < ApplicationController
def index
@comments = Comment.where("article_id = ? and created_at > ?", params[:article_id], Time.at(params[:after].to_i + 1))
end

def new
@comment = Comment.new
end

def create
@comment = Comment.new(params[:comment])
if @comment.save
flash[:notice] = "Successfully created comment."
redirect_to @comment.article
else
render :action => 'new'
end
end
end
2 changes: 2 additions & 0 deletions episode-229/blog/app/helpers/application_helper.rb
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module ApplicationHelper
end
2 changes: 2 additions & 0 deletions episode-229/blog/app/helpers/articles_helper.rb
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module ArticlesHelper
end
2 changes: 2 additions & 0 deletions episode-229/blog/app/helpers/comments_helper.rb
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module CommentsHelper
end
23 changes: 23 additions & 0 deletions episode-229/blog/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)
22 changes: 22 additions & 0 deletions episode-229/blog/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) { 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
4 changes: 4 additions & 0 deletions episode-229/blog/app/models/article.rb
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class Article < ActiveRecord::Base
attr_accessible :name, :content
has_many :comments
end
4 changes: 4 additions & 0 deletions episode-229/blog/app/models/comment.rb
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class Comment < ActiveRecord::Base
attr_accessible :article_id, :name, :content
belongs_to :article
end
12 changes: 12 additions & 0 deletions episode-229/blog/app/views/articles/_form.html.erb
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<%= form_for @article do |f| %>
<%= f.error_messages %>
<p>
<%= f.label :name %><br />
<%= f.text_field :name %>
</p>
<p>
<%= f.label :content %><br />
<%= f.text_area :content %>
</p>
<p><%= f.submit %></p>
<% end %>
8 changes: 8 additions & 0 deletions episode-229/blog/app/views/articles/edit.html.erb
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<% title "Edit Article" %>
<%= render 'form' %>

<p>
<%= link_to "Show", @article %> |
<%= link_to "View All", articles_path %>
</p>
14 changes: 14 additions & 0 deletions episode-229/blog/app/views/articles/index.html.erb
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<% title "Articles" %>

<div id="articles">
<% for article in @articles %>
<h2>
<%= link_to article.name, article %>
<span class="comments">(<%= pluralize(article.comments.size, 'comment') %>)</span>
</h2>
<div class="created_at">on <%= article.created_at.strftime('%b %d, %Y') %></div>
<div class="content"><%= simple_format(article.content) %></div>
<% end %>
</div>

<p><%= link_to "New Article", new_article_path %></p>
5 changes: 5 additions & 0 deletions episode-229/blog/app/views/articles/new.html.erb
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<% title "New Article" %>
<%= render 'form' %>

<p><%= link_to "Back to List", articles_path %></p>
19 changes: 19 additions & 0 deletions episode-229/blog/app/views/articles/show.html.erb
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<% title @article.name %>

<div id="article" data-id="<%= @article.id %>">
<%= simple_format @article.content %>

<p><%= link_to "Back to Articles", articles_path %></p>

<% unless @article.comments.empty? %>
<h2><%= pluralize(@article.comments.size, 'comment') %></h2>

<div id="comments">
<%= render @article.comments %>
</div>
<% end %>

<h3>Add your comment:</h3>

<%= render :partial => 'comments/form' %>
</div>
5 changes: 5 additions & 0 deletions episode-229/blog/app/views/comments/_comment.html.erb
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<div class="comment" data-time="<%= comment.created_at.to_i %>">
<strong><%= comment.name %></strong>
<em>on <%= comment.created_at.strftime('%b %d, %Y at %I:%M %p') %></em>
<%= simple_format comment.content %>
</div>
13 changes: 13 additions & 0 deletions episode-229/blog/app/views/comments/_form.html.erb
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<%= form_for @comment do |f| %>
<%= f.error_messages %>
<%= f.hidden_field :article_id %>
<p>
<%= f.label :name %><br />
<%= f.text_field :name %>
</p>
<p>
<%= f.label :content, "Comment" %><br />
<%= f.text_area :content, :rows => '12', :cols => 35 %>
</p>
<p><%= f.submit %></p>
<% end %>
4 changes: 4 additions & 0 deletions episode-229/blog/app/views/comments/index.js.erb
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<% unless @comments.empty? %>
$("#comments").append("<%=raw escape_javascript(render(@comments)) %>");
$("#article h2").text($(".comment").length + " comments");
<% end %>
3 changes: 3 additions & 0 deletions episode-229/blog/app/views/comments/new.html.erb
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<% title "New Comment" %>
<%= render "form" %>
19 changes: 19 additions & 0 deletions episode-229/blog/app/views/layouts/application.html.erb
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<!DOCTYPE html>
<html>
<head>
<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>
4 changes: 4 additions & 0 deletions episode-229/blog/config.ru
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# This file is used by Rack-based servers to start the application.

require ::File.expand_path('../config/environment', __FILE__)
run Blog::Application

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