code: def make_alias_redirect_url(self, path, endpoint, values, method, query_args):
          
          url = self.build(endpoint, values, method, append_unknown=False,
                           force_external=True)
          if query_args:
              url += '?' + self.encode_query_args(query_args)
          assert url != path, 'detected invalid alias setting.  No canonical ' \
                 'URL found'
          return url
docs: Internally called to make an alias redirect URL.