Fixes #2901: Fix ordering regions by site count

netbox/dcim/models.py

@@ -217,8 +217,7 @@ class Region(MPTTModel, ChangeLoggedModel):
             self.parent.name if self.parent else None,
         )
 
-    @property
-    def site_count(self):
+    def get_site_count(self):
         return Site.objects.filter(
             Q(region=self) |
             Q(region__in=self.get_descendants())

netbox/dcim/views.py

@@ -135,7 +135,13 @@ class BulkDisconnectView(GetReturnURLMixin, View):
 #
 
 class RegionListView(ObjectListView):
-    queryset = Region.objects.all()
+    queryset = Region.objects.add_related_count(
+        Region.objects.all(),
+        Site,
+        'region',
+        'site_count',
+        cumulative=True
+    )
     filter = filters.RegionFilter
     filter_form = forms.RegionFilterForm
     table = tables.RegionTable