orbit-basic/app/models/design/layout.rb

class Layout < DesignFile
  include Parser
  embedded_in :design

  attr_reader :content
  has_many :layout_parts

  def content
    self.file.read
  end

  def self.exist_one?
    Layout.count > 0
  end

  after_save:parse_layout

  def parse_layout  
    parse_layout_layout_part(self)
  end
end