class ShareImage < ActiveRecord::Base
  
  has_many :image_file_share_images
  has_many :image_files, :through => :image_file_share_images
  
  validates :slug, :presence => true, :uniqueness => true
  before_validation do
  

    
      if !self.slug
        begin
          self.slug = SecureRandom.hex(5)
        end while ShareImage.exists?(:slug => self.slug)
      
      end
    
    
  end
  
end