Fix sentry issue ifrc-go/issues/2091

Author: szabozoltan69

api/drf_views.py

@@ -1051,12 +1051,13 @@ class FieldReportViewset(ReadOnlyVisibilityViewsetMixin, viewsets.ModelViewSet):
     ordering_fields = ("summary", "event", "dtype", "created_at", "updated_at")
     filterset_class = FieldReportFilter
     permission_classes = [DenyGuestUserMutationPermission]
-    queryset = FieldReport.objects.select_related("dtype", "event").prefetch_related(
+    queryset = FieldReport.objects.select_related("dtype", "event", "event__dtype").prefetch_related(
         "actions_taken",
         "actions_taken__actions",
         "contacts",
         "countries",
         "districts",
+        "event__countries_for_preview",
         # Unusable – in serializer: wired-in get_merged_items_by_fields():
         # "event__countries",
         "external_partners",