Closes #1931: Added a count of assigned IP addresses to the interface API serializer

netbox/dcim/api/views.py

@@ -1,7 +1,7 @@
 from collections import OrderedDict
 
 from django.conf import settings
-from django.db.models import F, Q
+from django.db.models import Count, F, Q
 from django.http import HttpResponseForbidden
 from django.shortcuts import get_object_or_404
 from drf_yasg import openapi
@@ -409,7 +409,7 @@ class InterfaceViewSet(CableTraceMixin, ModelViewSet):
     queryset = Interface.objects.select_related(
         'device', '_connected_interface', '_connected_circuittermination', 'cable'
     ).prefetch_related(
-        'tags'
+        'ip_addresses', 'tags'
     )
     serializer_class = serializers.InterfaceSerializer
     filterset_class = filters.InterfaceFilter