#238 Mongoid

bundle
rails g mongoid:config
rails g scaffold article name:string content:text
rails g model comment name:string content:text
rails g controller comments
rails g scaffold author name:string

gem 'mongoid', '2.0.0.beta.19'
gem 'bson_ext'

class Article
  include Mongoid::Document
  field :name
  field :content
  field :published_on, :type => Date
  validates_presence_of :name
  embeds_many :comments
  referenced_in :author
end

class Comment
  include Mongoid::Document
  field :name
  field :content
  embedded_in :article, :inverse_of => :comments
end

class Author
  include Mongoid::Document
  field :name
  key :name
  references_many :articles
end

def create
  @article = Article.find(params[:article_id])
  @comment = @article.comments.create!(params[:comment])
  redirect_to @article, :notice => "Comment created!"
end

<div class="field">
  <%= f.label :published_on %><br />
  <%= f.date_select :published_on %>
</div>
<div class="field">
  <%= f.label :author_id %><br />
  <%= f.collection_select :author_id, Author.all, :id, :name %>
</div>

<% if @article.comments.size > 0 %>
  <h2>Comments</h2>
  <% for comment in @article.comments %>
    <h3><%= comment.name %></h3>
    <p><%= comment.content %></p>
  <% end %>
<% end %>

<h2>New Comment</h2>
<%= form_for [@article, Comment.new] do |f| %>
  <p><%= f.label :name %> <%= f.text_field :name %></p>
  <p><%= f.text_area :content, :rows => 10 %></p>
  <p><%= f.submit %></p>
<% end %>