  class HyperlinkedRelatedField(RelatedField):
      """
      Represents a relationship using hyperlinking.
      """
      pk_url_kwarg = 'pk'
      slug_field = 'slug'
      slug_url_kwarg = None  # Defaults to same as `slug_field` unless overridden
      read_only = False
  
      default_error_messages = {
          'no_match': _('Invalid hyperlink - No URL match'),
          'incorrect_match': _('Invalid hyperlink - Incorrect URL match'),
 
</s> remove         except (TypeError, ValueError):
            msg = self.error_messages['incorrect_type']
            raise ValidationError(msg % type(value).__name__)

        return obj
 </s> add  </s> remove         kwargs = {self.pk_url_kwarg: obj.pk, self.slug_url_kwarg: slug}
 </s> add         Takes the matched URL conf arguments, and the queryset, and should
        return an object instance, or raise an `ObjectDoesNotExist` exception.
        """
        lookup = view_kwargs.get(self.lookup_field, None)
        pk = view_kwargs.get(self.pk_url_kwarg, None)
        slug = view_kwargs.get(self.slug_url_kwarg, None)

        if lookup is not None:
            filter_kwargs = {self.lookup_field: lookup}
        elif pk is not None:
            filter_kwargs = {'pk': pk}
        elif slug is not None:
            filter_kwargs = {self.slug_field: slug}
        else:
            raise ObjectDoesNotExist()

        return queryset.get(**filter_kwargs)

    def to_native(self, obj):
        view_name = self.view_name
        request = self.context.get('request', None)
        format = self.format or self.context.get('format', None)

        if request is None:
            msg = (
                "Using `HyperlinkedRelatedField` without including the request "
                "in the serializer context is deprecated. "
                "Add `context={'request': request}` when instantiating "
                "the serializer."
            )
            warnings.warn(msg, DeprecationWarning, stacklevel=4)

        # If the object has not yet been saved then we cannot hyperlink to it.
        if getattr(obj, 'pk', None) is None:
            return

        # Return the hyperlink, or error if incorrectly configured. </s> remove         self.format = kwargs.pop('format', None)
 </s> add 
  class HyperlinkedRelatedField(RelatedField):
      """
      Represents a relationship using hyperlinking.
      """



      read_only = False
  
      default_error_messages = {
          'no_match': _('Invalid hyperlink - No URL match'),
          'incorrect_match': _('Invalid hyperlink - Incorrect URL match'),
keep keep keep keep replace replace replace keep keep keep keep keep
 lookup_field on hyperlinked fields, and overriddable hyperlinked fields.  Closes #688 
rest_framework/relations.py