def have_id(self): img_id = self.request.get("img") current_comic = RabiaStore.get(img_id) next_comic = RabiaStore.all().filter("datetime <", current_comic.datetime).order("-datetime") next_comic = next_comic.get() prev_comic = RabiaStore.all().filter("datetime >", current_comic.datetime).order("datetime") prev_comic = prev_comic.get() if next_comic is not None: next_comic = next_comic.key() else: next_comic = False if prev_comic is not None: prev_comic = prev_comic.key() else: prev_comic = False self.template_values = { "prev_comic_id": prev_comic, "next_comic_id": next_comic, "imgur_url": current_comic.url, }