django - django-reversion と関連モデル

Question

私は次のmodels.pyを持っています

class Contact(models.Model):
    pass

class Link(models.Model):
    pass

class Relationship(models.Model):
    # Documentation
    __doc__ = _(u'Stores a relationship between 2 contacts.')
    # Attributes
    from_contact = models.ForeignKey(Contact, related_name='from_contacts', verbose_name=_(u'first contact'), help_text=_(u'The first contact implicated by the relationship.'))
    link = models.ForeignKey(Link, related_name=u'relationships', verbose_name=_(u'relationship link'), help_text=_(u'The relationship link between both contacts.'))
    to_contact = models.ForeignKey(Contact, related_name='to_contacts', verbose_name=_(u'second contact'), help_text=_(u'The second contact implicated by the relationship.'))

    # Meta-data
    class Meta:
        verbose_name = u'Relationship'
        verbose_name_plural = u'Relationships'
        unique_together = ('from_contact', 'link', 'to_contact')

Django と のクラスベースのビューを使用してRevision Context Manager、2 つの連絡先の間に新しい関係を作成するたびにリビジョンを作成できます

# part of my views.py
class RelationshipCreateView(LoginRequiredMixin, CreateView):
    template_name = u'frontend/relationships/relationship-create.html'
    model = Relationship
    form_class = RelationshipForm

    def get_success_url(self):
        return reverse_lazy('contact-detail', kwargs={'contact_pk': self.kwargs['contact_pk']})

    def form_valid(self, form):
        contact = Contact.objects.get(pk=self.kwargs['contact_pk'])
        link = form.cleaned_data['link']
        other = form.cleaned_data['other']
        inverse = form.cleaned_data['inverse_relationship']
        relationship = None
        if not inverse:
            relationship = Relationship(
                from_contact=contact,
                link=link,
                to_contact=other
            )
        else:
            relationship = Relationship(
                from_contact=other,
                link=link,
                to_contact=contact
            )
        with reversion.create_revision():
            relationship.save()
            reversion.set_comment(_(u'A relationship has been added between %(from)s and %(to)s' % {'from': relationship.from_contact, 'to': relationship.to_contact}))
        return HttpResponseRedirect(self.get_success_url())

ただし、連絡先の 1 つだけがリビジョン (最初のリビジョン) とそれに伴うコメントを取得します。Revision Context Manager両方のリビジョンを作成するためにどのように使用できますか?