From e89343e10051a6dc84f099efe93eb2543e2bed0b Mon Sep 17 00:00:00 2001
From: hellerve <veit@veitheller.de>
Date: Sun, 2 Jun 2019 14:26:00 +0200
Subject: [PATCH] dcim: filter group by site in rack filter (fixes #3229)

---
 netbox/dcim/forms.py | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/netbox/dcim/forms.py b/netbox/dcim/forms.py
index f10418d57..e8bcf71b0 100644
--- a/netbox/dcim/forms.py
+++ b/netbox/dcim/forms.py
@@ -601,12 +601,18 @@ class RackFilterForm(BootstrapMixin, TenancyFilterForm, CustomFieldFilterForm):
         widget=APISelectMultiple(
             api_url="/api/dcim/sites/",
             value_field="slug",
+            filter_for={
+                'group_id': 'site'
+            }
         )
     )
-    group_id = FilterChoiceField(
-        queryset=RackGroup.objects.select_related('site'),
+
+    group_id = ChainedModelChoiceField(
         label='Rack group',
-        null_label='-- None --',
+        queryset=RackGroup.objects.select_related('site'),
+        chains=(
+            ('site', 'site'),
+        ),
         widget=APISelectMultiple(
             api_url="/api/dcim/rack-groups/",
             null_option=True,