title: Mongoid how to insert embedded record?
body: <p>I've got 2 classes... Articles and Comments (which are embedded in Articles).</p>
  
  <pre><code>class Article
     include Mongoid::Document
     field :name, type: String
     field :content, type: String
     field :published_on, type: Date
  
     validates_presence_of :name
  
     embeds_many :comments
  end
  </code></pre>
  
  <p>and another one </p>
  
  <pre><code>class Comment
    include Mongoid::Document
    field :name, type: String
    field :content, type: String
  
    embedded_in :article, :inverse_of =&gt; :comments
  end
  </code></pre>
  
  <p>The Json representation of this mongodb document is:</p>
  
  <pre><code>{
     _id:ObjectId("50ae35274b6b5eaa77000001"),
     author_id:ObjectId("50ae3b1e4b6b5e8162000001"),
     comments:[
        {
           _id:ObjectId("50ae380e4b6b5e0c34000001"),
           name:"fak",
           content:"i like this article
        }
  
     ],
     content:"article about nothing",
     name:"my sweet article",
  }
  </code></pre>
  
  <p>How do I insert another comment in this document using mongoid on rails?</p>
  
  <p>Thanks
  Fak</p>