adding episode 196

episode-196/README

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+Railscasts Episode #196: Nested Fields Part 1
+
+http://railscasts.com/episodes/196
+
+Commands
+
+  rails surveysays
+  script/generate nifty_layout
+  script/generate nifty_scaffold survey name:string
+  script/generate model question survey_id:integer content:text
+  script/generate model answer question_id:integer content:string
+  rake db:migrate

episode-196/surveysays/.gitignore

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+tmp/**/*
+log/*.log
+*.sqlite3

episode-196/surveysays/README

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+Example application for Railscasts. To get started:
+
+  rake db:migrate
+  script/server

episode-196/surveysays/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.join(File.dirname(__FILE__), 'config', 'boot'))
+
+require 'rake'
+require 'rake/testtask'
+require 'rake/rdoctask'
+
+require 'tasks/rails'

episode-196/surveysays/app/controllers/application_controller.rb

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+# Filters added to this controller apply to all controllers in the application.
+# Likewise, all the methods added will be available for all controllers.
+
+class ApplicationController < ActionController::Base
+  helper :all # include all helpers, all the time
+  protect_from_forgery # See ActionController::RequestForgeryProtection for details
+
+  # Scrub sensitive parameters from your log
+  # filter_parameter_logging :password
+end

episode-196/surveysays/app/controllers/surveys_controller.rb

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+class SurveysController < ApplicationController
+  def index
+    @surveys = Survey.all
+  end
+
+  def show
+    @survey = Survey.find(params[:id])
+  end
+
+  def new
+    @survey = Survey.new
+    3.times do
+      question = @survey.questions.build
+      4.times { question.answers.build }
+    end
+  end
+
+  def create
+    @survey = Survey.new(params[:survey])
+    if @survey.save
+      flash[:notice] = "Successfully created survey."
+      redirect_to @survey
+    else
+      render :action => 'new'
+    end
+  end
+
+  def edit
+    @survey = Survey.find(params[:id])
+  end
+
+  def update
+    @survey = Survey.find(params[:id])
+    if @survey.update_attributes(params[:survey])
+      flash[:notice] = "Successfully updated survey."
+      redirect_to @survey
+    else
+      render :action => 'edit'
+    end
+  end
+
+  def destroy
+    @survey = Survey.find(params[:id])
+    @survey.destroy
+    flash[:notice] = "Successfully destroyed survey."
+    redirect_to surveys_url
+  end
+end

episode-196/surveysays/app/helpers/application_helper.rb

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+# Methods added to this helper will be available to all templates in the application.
+module ApplicationHelper
+end

episode-196/surveysays/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

episode-196/surveysays/app/helpers/surveys_helper.rb

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+module SurveysHelper
+end

episode-196/surveysays/app/models/answer.rb

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+class Answer < ActiveRecord::Base
+  belongs_to :question
+end

episode-196/surveysays/app/models/question.rb

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+class Question < ActiveRecord::Base
+  belongs_to :survey
+  has_many :answers, :dependent => :destroy
+  accepts_nested_attributes_for :answers, :reject_if => lambda { |a| a[:content].blank? }, :allow_destroy => true
+end

episode-196/surveysays/app/models/survey.rb

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+class Survey < ActiveRecord::Base
+  has_many :questions, :dependent => :destroy
+  accepts_nested_attributes_for :questions, :reject_if => lambda { |a| a[:content].blank? }, :allow_destroy => true
+end

episode-196/surveysays/app/views/layouts/application.html.erb

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+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+  <head>
+    <title><%= h(yield(:title) || "Untitled") %></title>
+    <%= stylesheet_link_tag 'application' %>
+    <%= yield(:head) %>
+  </head>
+  <body>
+    <div id="container">
+      <%- flash.each do |name, msg| -%>
+        <%= content_tag :div, msg, :id => "flash_#{name}" %>
+      <%- end -%>
+      
+      <%- if show_title? -%>
+        <h1><%=h yield(:title) %></h1>
+      <%- end -%>
+      
+      <%= yield %>
+    </div>
+  </body>
+</html>

episode-196/surveysays/app/views/surveys/_answer_fields.html.erb

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+<p>
+  <%= f.label :content, "Answer" %>
+  <%= f.text_field :content %>
+  <%= f.check_box :_destroy %>
+  <%= f.label :_destroy, "Remove" %>
+</p>

episode-196/surveysays/app/views/surveys/_form.html.erb

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+<% form_for @survey do |f| %>
+  <%= f.error_messages %>
+  <p>
+    <%= f.label :name %><br />
+    <%= f.text_field :name %>
+  </p>
+  <% f.fields_for :questions do |builder| %>
+    <%= render "question_fields", :f => builder %>
+  <% end %>
+  <p><%= f.submit "Submit" %></p>
+<% end %>

episode-196/surveysays/app/views/surveys/_question_fields.html.erb

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+<p>
+  <%= f.label :content, "Question" %><br />
+  <%= f.text_area :content, :rows => 3 %><br />
+  <%= f.check_box :_destroy %>
+  <%= f.label :_destroy, "Remove Question" %>
+</p>
+<% f.fields_for :answers do |builder| %>
+  <%= render 'answer_fields', :f => builder %>
+<% end %>

episode-196/surveysays/app/views/surveys/edit.html.erb

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+<% title "Edit Survey" %>
+
+<%= render :partial => 'form' %>
+
+<p>
+  <%= link_to "Show", @survey %> |
+  <%= link_to "View All", surveys_path %>
+</p>

episode-196/surveysays/app/views/surveys/index.html.erb

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+<% title "Surveys" %>
+
+<table>
+  <tr>
+    <th>Name</th>
+  </tr>
+  <% for survey in @surveys %>
+    <tr>
+      <td><%=h survey.name %></td>
+      <td><%= link_to "Show", survey %></td>
+      <td><%= link_to "Edit", edit_survey_path(survey) %></td>
+      <td><%= link_to "Destroy", survey, :confirm => 'Are you sure?', :method => :delete %></td>
+    </tr>
+  <% end %>
+</table>
+
+<p><%= link_to "New Survey", new_survey_path %></p>

episode-196/surveysays/app/views/surveys/new.html.erb

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+<% title "New Survey" %>
+
+<%= render :partial => 'form' %>
+
+<p><%= link_to "Back to List", surveys_path %></p>

episode-196/surveysays/app/views/surveys/show.html.erb

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+<% title "Survey" %>
+
+<p>
+  <strong>Name:</strong>
+  <%=h @survey.name %>
+</p>
+
+<ol>
+<% for question in @survey.questions %>
+  <li>
+    <%=h question.content %>
+    <ul>
+    <% for answer in question.answers %>
+      <li><%=h answer.content %></li>
+    <% end %>
+    </ul>
+  </li>
+<% end %>
+</ol>
+
+<p>
+  <%= link_to "Edit", edit_survey_path(@survey) %> |
+  <%= link_to "Destroy", @survey, :confirm => 'Are you sure?', :method => :delete %> |
+  <%= link_to "View All", surveys_path %>
+</p>

episode-196/surveysays/config/boot.rb

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+# Don't change this file!
+# Configure your app in config/environment.rb and config/environments/*.rb
+
+RAILS_ROOT = "#{File.dirname(__FILE__)}/.." unless defined?(RAILS_ROOT)
+
+module Rails
+  class << self
+    def boot!
+      unless booted?
+        preinitialize
+        pick_boot.run
+      end
+    end
+
+    def booted?
+      defined? Rails::Initializer
+    end
+
+    def pick_boot
+      (vendor_rails? ? VendorBoot : GemBoot).new
+    end
+
+    def vendor_rails?
+      File.exist?("#{RAILS_ROOT}/vendor/rails")
+    end
+
+    def preinitialize
+      load(preinitializer_path) if File.exist?(preinitializer_path)
+    end
+
+    def preinitializer_path
+      "#{RAILS_ROOT}/config/preinitializer.rb"
+    end
+  end
+
+  class Boot
+    def run
+      load_initializer
+      Rails::Initializer.run(:set_load_path)
+    end
+  end
+
+  class VendorBoot < Boot
+    def load_initializer
+      require "#{RAILS_ROOT}/vendor/rails/railties/lib/initializer"
+      Rails::Initializer.run(:install_gem_spec_stubs)
+      Rails::GemDependency.add_frozen_gem_path
+    end
+  end
+
+  class GemBoot < Boot
+    def load_initializer
+      self.class.load_rubygems
+      load_rails_gem
+      require 'initializer'
+    end
+
+    def load_rails_gem
+      if version = self.class.gem_version
+        gem 'rails', version
+      else
+        gem 'rails'
+      end
+    rescue Gem::LoadError => load_error
+      $stderr.puts %(Missing the Rails #{version} gem. Please `gem install -v=#{version} rails`, update your RAILS_GEM_VERSION setting in config/environment.rb for the Rails version you do have installed, or comment out RAILS_GEM_VERSION to use the latest version installed.)
+      exit 1
+    end
+
+    class << self
+      def rubygems_version
+        Gem::RubyGemsVersion rescue nil
+      end
+
+      def gem_version
+        if defined? RAILS_GEM_VERSION
+          RAILS_GEM_VERSION
+        elsif ENV.include?('RAILS_GEM_VERSION')
+          ENV['RAILS_GEM_VERSION']
+        else
+          parse_gem_version(read_environment_rb)
+        end
+      end
+
+      def load_rubygems
+        min_version = '1.3.2'
+        require 'rubygems'
+        unless rubygems_version >= min_version
+          $stderr.puts %Q(Rails requires RubyGems >= #{min_version} (you have #{rubygems_version}). Please `gem update --system` and try again.)
+          exit 1
+        end
+
+      rescue LoadError
+        $stderr.puts %Q(Rails requires RubyGems >= #{min_version}. Please install RubyGems and try again: http://rubygems.rubyforge.org)
+        exit 1
+      end
+
+      def parse_gem_version(text)
+        $1 if text =~ /^[^#]*RAILS_GEM_VERSION\s*=\s*["']([!~<>=]*\s*[\d.]+)["']/
+      end
+
+      private
+        def read_environment_rb
+          File.read("#{RAILS_ROOT}/config/environment.rb")
+        end
+    end
+  end
+end
+
+# All that for this:
+Rails.boot!

episode-196/surveysays/config/database.yml

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+# SQLite version 3.x
+#   gem install sqlite3-ruby (not necessary on OS X Leopard)
+development:
+  adapter: sqlite3
+  database: db/development.sqlite3
+  pool: 5
+  timeout: 5000
+
+# Warning: The database defined as "test" will be erased and
+# re-generated from your development database when you run "rake".
+# Do not set this db to the same as development or production.
+test:
+  adapter: sqlite3
+  database: db/test.sqlite3
+  pool: 5
+  timeout: 5000
+
+production:
+  adapter: sqlite3
+  database: db/production.sqlite3
+  pool: 5
+  timeout: 5000