# File lib/active_record/base.rb, line 2336 def cache_key case when new_record? "#{self.class.model_name.cache_key}/new" when timestamp = self[:updated_at] "#{self.class.model_name.cache_key}/#{id}-#{timestamp.to_s(:number)}" else "#{self.class.model_name.cache_key}/#{id}" end end