Fixes #7397: Fix AttributeError exception when rendering export template for devices via REST API

docs/release-notes/version-3.0.md

@@ -6,6 +6,7 @@
 
 * [#6895](https://github.com/netbox-community/netbox/issues/6895) - Remove errant markup for null values in CSV export
 * [#7373](https://github.com/netbox-community/netbox/issues/7373) - Fix flashing when server, client, and browser color-mode preferences are mismatched
+* [#7397](https://github.com/netbox-community/netbox/issues/7397) - Fix AttributeError exception when rendering export template for devices via REST API
 
 ---
 

netbox/netbox/api/views.py

@@ -230,7 +230,7 @@ class ModelViewSet(BulkUpdateModelMixin, BulkDestroyModelMixin, ModelViewSet_):
         Overrides ListModelMixin to allow processing ExportTemplates.
         """
         if 'export' in request.GET:
-            content_type = ContentType.objects.get_for_model(self.serializer_class.Meta.model)
+            content_type = ContentType.objects.get_for_model(self.get_serializer_class().Meta.model)
             et = get_object_or_404(ExportTemplate, content_type=content_type, name=request.GET['export'])
             queryset = self.filter_queryset(self.get_queryset())
             return et.render_to_response(queryset)