Admin doesn't register address type how come (I use django)? - django-models

Question

This is the problem:
if a address is submitted the address should automatically register a ADDRESS TYPE in the address section in my admin as you can see on this picture where an address is submitted in an checkoutform (the address type should be the shipping address): enter image description here
this is the code of my models.py:
from django.db import models
from billing.models import BillingProfile
ADDRESS_TYPES = (
('billing', 'Billing'),
('shipping', 'Shipping'),
)
# Create your models here.
class Address(models.Model):
billing_profile = models.ForeignKey(BillingProfile)
address_type = models.CharField(max_length=120, choices=ADDRESS_TYPES)
address_line_1 = models.CharField(max_length=120)
address_line_2 = models.CharField(max_length=120, null=True, blank=True)
city = models.CharField(max_length=120)
country = models.CharField(max_length=120)
state = models.CharField(max_length=120)
postal_code = models.CharField(max_length=120)
def __str__(self):
return str(self.billing_profile)
and this is the views.py:
from django.shortcuts import render, redirect
from django.utils.http import is_safe_url
# CRUD create update retrieve delete
from billing.models import BillingProfile
from .forms import AddressForm
def checkout_address_create_view(request):
form = AddressForm(request.POST or None)
context = {
"form": form
}
next_ = request.GET.get('next')
next_post = request.POST.get('next')
redirect_path = next_ or next_post or None
if form.is_valid():
instance = form.save(commit=False)
billing_profile, billing_profile_created = BillingProfile.objects.new_or_get(request)
if billing_profile is not None:
instance.billing_profile = billing_profile
instance.address_type = request.POST.get('address_type', 'shipping')
instance.save()
else:
print("Error here")
return redirect("cart:checkout")
if is_safe_url(redirect_path, request.get_host()):
return redirect(redirect_path)
else:
return redirect("cart:checkout")
return redirect("cart:checkout")
This rule should do the trick in views.py, but unfortunately not showing in the admin (as seen on the picture :( :
instance.address_type = request.POST.get('address_type', 'shipping')
Does someone has advice?