Fixes #5557: Fix VRF route target assignment via REST API

Author: jeremystretch

docs/release-notes/version-2.10.md

@@ -12,6 +12,7 @@
 * [#5543](https://github.com/netbox-community/netbox/issues/5543) - Fix rendering of config contexts with cluster assignment for devices
 * [#5546](https://github.com/netbox-community/netbox/issues/5546) - Add custom field bulk edit support for cables, power panels, rack reservations, and virtual chassis
 * [#5547](https://github.com/netbox-community/netbox/issues/5547) - Add custom field bulk import support for cables, power panels, rack reservations, and virtual chassis
+* [#5557](https://github.com/netbox-community/netbox/issues/5557) - Fix VRF route target assignment via REST API
 * [#5558](https://github.com/netbox-community/netbox/issues/5558) - Fix regex validation support for custom URL fields
 
 ---

netbox/ipam/api/serializers.py

@@ -25,8 +25,18 @@
 class VRFSerializer(TaggedObjectSerializer, CustomFieldModelSerializer):
     url = serializers.HyperlinkedIdentityField(view_name='ipam-api:vrf-detail')
     tenant = NestedTenantSerializer(required=False, allow_null=True)
-    import_targets = NestedRouteTargetSerializer(required=False, allow_null=True, many=True)
-    export_targets = NestedRouteTargetSerializer(required=False, allow_null=True, many=True)
+    import_targets = SerializedPKRelatedField(
+        queryset=RouteTarget.objects.all(),
+        serializer=NestedRouteTargetSerializer,
+        required=False,
+        many=True
+    )
+    export_targets = SerializedPKRelatedField(
+        queryset=RouteTarget.objects.all(),
+        serializer=NestedRouteTargetSerializer,
+        required=False,
+        many=True
+    )
     ipaddress_count = serializers.IntegerField(read_only=True)
     prefix_count = serializers.IntegerField(read_only=True)