orbit-4-1/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

  mount_uploader :layout, DesignFileUploader

  embeds_many :stylesheets
  embeds_many :javascripts
  embeds_many :images

  before_save :cleanup_empty_fields
  after_save :procs_embedded_objects
  
  def javascripts=(*attrs)
    self.files = (attrs << 'javascripts')
  end
  
  def stylesheets=(*attrs)
    self.files = (attrs << 'stylesheets')
  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|
      files.build(:file => a[:file], :to_save => true)
    end
  end
  
  protected
  def cleanup_empty_fields
  end
  def procs_embedded_objects
    [self.stylesheets, 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