Merge lp:~jtv/maas/1.2-bug-1077075 into lp:maas/1.2

[Jeroen T. Vermeulen]

Backport trunk r1344: Fix oops when renaming accepted nodegroup without interfaces.

Fixes bug 1077075 in Quantal. Backported from trunk without changes.

Jeroen

[Jeroen T. Vermeulen (jtv)]

Already reviewed & landed in trunk. Tests pass. Self-approving.

review: Approve

=== modified file 'src/maasserver/forms.py'
--- src/maasserver/forms.py	2012-11-08 09:14:58 +0000
+++ src/maasserver/forms.py	2012-11-09 18:17:21 +0000
@@ -833,6 +833,11 @@
             return new_name
 
         interface = self.instance.get_managed_interface()
+        if interface is None:
+            # No network interfaces.  It's weird, but there certainly
+            # won't be a problem with the name change.
+            return new_name
+
         if interface.management != NODEGROUPINTERFACE_MANAGEMENT.DHCP_AND_DNS:
             # MAAS is not managing DNS on this network, so the user can
             # rename the zone at will.
 
=== modified file 'src/maasserver/tests/test_forms.py'
--- src/maasserver/tests/test_forms.py	2012-10-30 15:15:30 +0000
+++ src/maasserver/tests/test_forms.py	2012-11-09 18:17:21 +0000
@@ -57,6 +57,7 @@
     MACAddress,
     Node,
     NodeGroup,
+    NodeGroupInterface,
     )
 from maasserver.models.config import DEFAULT_CONFIG
 from maasserver.node_action import (
@@ -992,3 +993,13 @@
         self.assertTrue(form.is_valid())
         form.save()
         self.assertEqual(data['name'], reload_object(nodegroup).name)
+
+    def test_accepts_name_change_if_nodegroup_has_no_interface(self):
+        nodegroup, node = make_unrenamable_nodegroup_with_node()
+        NodeGroupInterface.objects.filter(nodegroup=nodegroup).delete()
+        data = self.make_form_data(nodegroup)
+        data['name'] = factory.make_name('new-name')
+        form = NodeGroupEdit(instance=nodegroup, data=data)
+        self.assertTrue(form.is_valid())
+        form.save()
+        self.assertEqual(data['name'], reload_object(nodegroup).name)