From 60d3d368fe8691c07ac97686ed9fb515fa3d6a53 Mon Sep 17 00:00:00 2001
From: Chris Lovering <chris@owlcorp.uk>
Date: Sun, 5 Jul 2026 18:00:57 -0400
Subject: [PATCH] Fix n+1 warning on filters endpoint

The FilterListSerializer serializes each list's nested filters, so listing filter lists issued a separate SELECT ... FROM api_filter per list. Adding prefetch_related batches all filter rows into a single additional query
---
 pydis_site/apps/api/viewsets/bot/filters.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pydis_site/apps/api/viewsets/bot/filters.py b/pydis_site/apps/api/viewsets/bot/filters.py
index 9c9e83388..90b6f8ec8 100644
--- a/pydis_site/apps/api/viewsets/bot/filters.py
+++ b/pydis_site/apps/api/viewsets/bot/filters.py
@@ -315,7 +315,7 @@ class FilterListViewSet(ModelViewSet):
     """
 
     serializer_class = FilterListSerializer
-    queryset = FilterList.objects.all()
+    queryset = FilterList.objects.prefetch_related("filters")
 
 
 class FilterViewSet(ModelViewSet):