Reduce the number of SQL queries made in API calls

This is done by adding missing tables/colums to the prefetch querysets.

netbox/dcim/api/views.py

@@ -83,7 +83,7 @@ class RackRoleViewSet(ModelViewSet):
 #
 
 class RackViewSet(WritableSerializerMixin, CustomFieldModelViewSet):
-    queryset = Rack.objects.select_related('site', 'group__site', 'tenant')
+    queryset = Rack.objects.select_related('site', 'group__site', 'tenant', 'rackrole')
     serializer_class = serializers.RackSerializer
     write_serializer_class = serializers.WritableRackSerializer
     filter_class = filters.RackFilter
@@ -219,6 +219,7 @@ class DeviceViewSet(WritableSerializerMixin, CustomFieldModelViewSet):
     queryset = Device.objects.select_related(
         'device_type__manufacturer', 'device_role', 'tenant', 'platform', 'site', 'rack', 'parent_bay',
     ).prefetch_related(
+        'primary_ip4', 'primary_ip6',
         'primary_ip4__nat_outside', 'primary_ip6__nat_outside',
     )
     serializer_class = serializers.DeviceSerializer
@@ -320,7 +321,16 @@ class PowerOutletViewSet(WritableSerializerMixin, ModelViewSet):
 
 
 class InterfaceViewSet(WritableSerializerMixin, ModelViewSet):
-    queryset = Interface.objects.select_related('device')
+    queryset = Interface.objects.select_related(
+            'circuit_termination__circuit',
+            'circuit_termination__interface',
+            'connected_as_a__interface_b',
+            'connected_as_a__interface_b__device',
+            'connected_as_b__interface_a',
+            'connected_as_b__interface_a__device',
+            'device',
+            'lag',
+        )
     serializer_class = serializers.InterfaceSerializer
     write_serializer_class = serializers.WritableInterfaceSerializer
     filter_class = filters.InterfaceFilter

netbox/extras/api/views.py

@@ -92,6 +92,6 @@ class RecentActivityViewSet(ReadOnlyModelViewSet):
     """
     List all UserActions to provide a log of recent activity.
     """
-    queryset = UserAction.objects.all()
+    queryset = UserAction.objects.select_related('user')
     serializer_class = serializers.UserActionSerializer
     filter_class = filters.UserActionFilter

netbox/ipam/api/views.py

@@ -134,7 +134,19 @@ class PrefixViewSet(WritableSerializerMixin, CustomFieldModelViewSet):
 #
 
 class IPAddressViewSet(WritableSerializerMixin, CustomFieldModelViewSet):
-    queryset = IPAddress.objects.select_related('vrf__tenant', 'tenant', 'interface__device', 'nat_inside')
+    queryset = IPAddress.objects.select_related(
+            'interface',
+            'interface__circuit_termination',
+            'interface__connected_as_a__interface_b',
+            'interface__connected_as_a__interface_b__device',
+            'interface__connected_as_b__interface_a',
+            'interface__connected_as_b__interface_a__device',
+            'interface__device',
+            'nat_inside',
+            'nat_outside',
+            'tenant',
+            'vrf__tenant',
+        )
     serializer_class = serializers.IPAddressSerializer
     write_serializer_class = serializers.WritableIPAddressSerializer
     filter_class = filters.IPAddressFilter