Example idempotent resource creation

create_inventory_item.py

def create_inventory_item(request):
  body_unicode = request.body.decode('utf-8')
  body = json.loads(body_unicode)
  idempotent_id = body.get('idempotent_id')
  item = InventoryModel.objects.get(idempotent_id=idempotent_id)

  if item:
    return JsonResponse(item) # Will include the backend primary key ID
  else:
    InventoryModel.objects.create(
      idempotent_id=idempotent_id, # Stored in the DB
      name=body.get('name')
      ...
    )