gistfile1.rb

  def create(comment)
    @article = Article.get(params[:article_id])
    @comment = Comment.new(comment.merge(:article => @article))
    if @comment.save
      redirect resource(@article), :message => {:notice => 'Your comment was saved.'}
    else
      redirect resource(@article), :message => {:error => 'Must fill in all fields.'}
    end
  end