How to combine output by ID and by SLUG in one URL?

Question

Django

Hello. Python 3.6.2 / Django 1.11.5 is used
It is necessary to be able to go to the page both by a link like /id1 and a slug like /kosmos
Done, it works, but there is a feeling that this can be done somehow better / more correctly / more beautiful. Can you please tell me if it is possible to compress / link / improve what is written below?
In urls.py

url(r'^id(?P<projekto_id>[0-9]+)/$', muro_views.sociaprojekto, name='muro_sociaprojekto'),
url(r'^(?P<projekto_slug>[\w-]+)/$', muro_views.sociaprojekto_slug, name='sociaprojekto_slug'),

In views.py

def sociaprojekto(request, projekto_id):

    sociaprojekto = get_object_or_404(KomunumojSociaprojekto, id=projekto_id)

    return render(request, 'muroj/muro_sociaprojekto.html', {'sociaprojekto': sociaprojekto,})


def sociaprojekto_slugo(request, projekto_slug):

    sociaprojekto = get_object_or_404(KomunumojSociaprojekto, slug__slug=projekto_slug)

    return render(request, 'muroj/muro_sociaprojekto.html', {'sociaprojekto': sociaprojekto,})

slug__slug is because it uses a separate model/table for slugs.

Answer 1

Premature optimization
But slug__slug is the problem

Answer 2

In this case, you will have pages duplicated at different addresses. If nothing has changed, then the search engines do not like it. You need to choose one main method, for example, by slug, and redirect to the main one from another option.
ps By the way, are you sure that the slug will never consist of only numbers?