orbit-basic/app/models/desktop.rb

class Desktop
  include Mongoid::Document
  include Mongoid::Timestamps
  
  field :theme, default: "default"
  
  belongs_to :user
  has_many  :sections, :autosave => true, :dependent => :destroy

  before_create :initialize_section
  
  def initialize_section
    self.sections.build(name: "Desktop 1")
    self.sections.build(name: "Desktop 2")
    self.sections.build(name: "Desktop 3")
    self.sections.build(name: "Desktop 4")
  end
  
end