Allow changing an existing reverse zone to RFC2317

Author: peteeckel

netbox_dns/models/zone.py

@@ -912,6 +912,8 @@ def clean(self, *args, **kwargs):
 
         if self.is_reverse_zone:
             self.arpa_network = self.network_from_name
+        else:
+            self.arpa_network = None
 
         if self.is_rfc2317_zone:
             if self.arpa_network is not None:

netbox_dns/tests/rfc2317/test_zones.py

@@ -358,3 +358,13 @@ def test_create_parent_zone_new_parent(self):
         self.assertTrue(rfc2317_zone.rfc2317_parent_managed)
         self.assertIn(rfc2317_zone, zone2.rfc2317_child_zones.all())
         self.assertEqual(rfc2317_zone.rfc2317_parent_zone, zone2)
+
+    def test_modify_zone_to_rfc2317(self):
+        zone = Zone.objects.create(name="2.0.192.in-addr.arpa", **self.zone_data)
+
+        zone.name = "0-15.2.0.192.in-addr.arpa"
+        zone.rfc2317_prefix = "192.0.2.0/28"
+        zone.save()
+
+        self.assertFalse(zone.is_reverse_zone)
+        self.assertTrue(zone.is_rfc2317_zone)