def flush_cache
      Rails.cache.delete([self.class.name, symbol_was.to_s])
      Rails.cache.delete([self.class.name, id])
    end
def flush_cache
      Rails.cache.delete([self.class.name, symbol_was.to_s])
      Rails.cache.delete([self.class.name, id])
    end
Flushes cache if record is saved