  
          # Ensure we clean the attributes so that we don't eg return integer
          # pk using a string representation, as provided by the url conf kwarg.
          if hasattr(obj, 'full_clean'):
              exclude = _get_validation_exclusions(obj, pk, slug_field, self.lookup_field)
              obj.full_clean(exclude)
  
  
  class DestroyModelMixin(object):
      """
 
</s> remove         if slug:
            setattr(obj, slug_field, slug)
 </s> add         setattr(obj, self.lookup_field, lookup_value) </s> remove         lookup = self.kwargs.get(lookup_url_kwarg, None)
        pk = self.kwargs.get(self.pk_url_kwarg, None)
        slug = self.kwargs.get(self.slug_url_kwarg, None)
        slug_field = slug and self.slug_field or None

        if lookup:
            setattr(obj, self.lookup_field, lookup)

        if pk:
            setattr(obj, 'pk', pk)
 </s> add         lookup_value = self.kwargs[lookup_url_kwarg] </s> remove     include = []

    if pk:
        # Deprecated
 </s> add     if lookup_field == 'pk': </s> remove         try:
            return reverse(view_name, kwargs=kwargs, request=request, format=format)
        except NoReverseMatch:
            pass

        if self.pk_url_kwarg != 'pk':
            # Only try pk if it has been explicitly set.
            # Otherwise, the default `lookup_field = 'pk'` has us covered.
            pk = obj.pk
            kwargs = {self.pk_url_kwarg: pk}
            try:
                return reverse(view_name, kwargs=kwargs, request=request, format=format)
            except NoReverseMatch:
                pass

        slug = getattr(obj, self.slug_field, None)
        if slug is not None:
            # Only try slug if it corresponds to an attribute on the object.
            kwargs = {self.slug_url_kwarg: slug}
            try:
                ret = reverse(view_name, kwargs=kwargs, request=request, format=format)
                if self.slug_field == 'slug' and self.slug_url_kwarg == 'slug':
                    # If the lookup succeeds using the default slug params,
                    # then `slug_field` is being used implicitly, and we
                    # we need to warn about the pending deprecation.
                    msg = 'Implicit slug field hyperlinked fields are deprecated.' \
                          'You should set `lookup_field=slug` on the HyperlinkedRelatedField.'
                    warnings.warn(msg, DeprecationWarning, stacklevel=2)
                return ret
            except NoReverseMatch:
                pass

        raise NoReverseMatch()
 </s> add         return reverse(view_name, kwargs=kwargs, request=request, format=format) </s> remove         # Determine the base queryset to use.
        if queryset is None:
            queryset = self.filter_queryset(self.get_queryset())
        else:
            pass  # Deprecation warning
 </s> add         queryset = self.filter_queryset(self.get_queryset())
            exclude = _get_validation_exclusions(obj, self.lookup_field)
  
          # Ensure we clean the attributes so that we don't eg return integer
          # pk using a string representation, as provided by the url conf kwarg.
          if hasattr(obj, 'full_clean'):
            exclude = _get_validation_exclusions(obj, self.lookup_field)
              obj.full_clean(exclude)
  
  
  class DestroyModelMixin(object):
      """
keep keep keep keep replace keep keep keep keep keep
 Remove `pk_url_field`, `slug_url_field`, `slug_field`.

Closes #1773. 
rest_framework/mixins.py