docs: def add_meta(self, obj, tags, prompt, verbosity, old_url=None):
          """
          Adds tags and a redirect for the given obj, which is a blog
          post or a page.
          """
          for tag in tags:
              keyword = self.trunc(Keyword, prompt, title=tag)
              keyword, created = Keyword.objects.get_or_create_iexact(**keyword)
              obj.keywords.create(keyword=keyword)
              if created and verbosity >= 1:
                  print("Imported tag: %s" % keyword)
          if old_url is not None:
              old_path = urlparse(old_url).path
              if not old_path.strip("/"):
                  return
              redirect = self.trunc(Redirect, prompt, old_path=old_path)
              redirect['site'] = Site.objects.get_current()
              redirect, created = Redirect.objects.get_or_create(**redirect)
              redirect.new_path = obj.get_absolute_url()
              redirect.save()
              if created and verbosity >= 1:
                  print("Created redirect for: %s" % old_url)