orbit-basic/app/models/design.rb

class Design
  include Mongoid::Document
  include Mongoid::Timestamps

  field :title
  field :author
  field :intro

  field :version

  validates_presence_of :title
  validates_presence_of :author

  embeds_one :layout
  mount_uploader :structure_css, DesignFileUploader

  embeds_many :themes
  embeds_many :javascripts
  embeds_many :images

  after_save :procs_embedded_objects
  after_destroy :del_embedded_objects
  
  def javascripts=(*attrs)
    self.files = (attrs << 'javascripts')
  end
  
  def themes=(*attrs)
    self.files = (attrs << 'themes')
  end
  
  def images=(*attrs)
    self.files = (attrs << 'images')
  end
  
  # Update or create the attribute_model records
  def files=(attrs)
    files = eval(attrs.last)
    attrs[0].each do |a|
      if(a[:id]=='' && !a[:file].nil? )
        if(a[:file]!='')
          files.build(:file => a[:file], :to_save => true)
        end
      else
        files.each do |file|
          if file.id.to_s == a[:id]
             file.to_destroy = a[:to_destroy]
          end
        end
      end
    end
  end
  
  protected
  def del_embedded_objects
    [self.themes, self.javascripts, self.images].each do |objects|
      objects.each do |object|
        object.destroy
      end
     end
  end
  def procs_embedded_objects
    [self.themes, self.javascripts, self.images].each do |objects|
      objects.each do |object|
        if object.file.blank?
          object.to_save = false
        end
        if object.to_save
          object.to_save = false
          object.save
        end
        if object.to_destroy
          object.destroy
        end
      end
    end
  end
end