From: Stephen Finucane <stephen@that.guru>
Date: Fri, 2 Nov 2018 17:45:20 +0000 (+0000)
Subject: admin: Further optimize queries
X-Git-Tag: v2.2.0-rc1~163
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=453aec00ef9d17260fbd21e8a933520a0721b278;p=thirdparty%2Fpatchwork.git

admin: Further optimize queries

To count the amount of received patches for a series, we only need the
patch's series field.

Signed-off-by: Stephen Finucane <stephen@that.guru>
---

diff --git a/patchwork/admin.py b/patchwork/admin.py
index 546e516d..f9a94c6f 100644
--- a/patchwork/admin.py
+++ b/patchwork/admin.py
@@ -6,6 +6,7 @@
 from django.contrib import admin
 from django.contrib.auth.admin import UserAdmin as BaseUserAdmin
 from django.contrib.auth.models import User
+from django.db.models import Prefetch
 
 from patchwork.models import Bundle
 from patchwork.models import Check
@@ -134,7 +135,8 @@ class SeriesAdmin(admin.ModelAdmin):
 
     def get_queryset(self, request):
         qs = super(SeriesAdmin, self).get_queryset(request)
-        return qs.prefetch_related('patches',)
+        return qs.prefetch_related(Prefetch(
+            'patches', Patch.objects.only('series',)))
 
 
 admin.site.register(Series, SeriesAdmin)