fix device and device_port delete not to kill nodes

Netdisco/lib/App/Netdisco/Core/Discover.pm

@@ -133,7 +133,7 @@ sub _set_canonical_ip {
 
             # our special delete which is more efficient
             schema('netdisco')->resultset('Device')
-              ->search({ ip => $device->ip })->delete;
+              ->search({ ip => $device->ip })->delete({keep_nodes => 1});
 
             # a new row object from the old one
             $device = schema('netdisco')->resultset('Device')
@@ -259,7 +259,7 @@ sub store_interfaces {
   }
 
   schema('netdisco')->txn_do(sub {
-    my $gone = $device->ports->delete;
+    my $gone = $device->ports->delete({keep_nodes => 1});
     debug sprintf ' [%s] interfaces - removed %s interfaces',
       $device->ip, $gone;
     $device->update_or_insert(undef, {for => 'update'});

Netdisco/lib/App/Netdisco/DB/ResultSet/Node.pm

@@ -77,13 +77,12 @@ handle the removal or archiving of nodes.
 sub delete {
   my $self = shift;
   my ($opts) = @_;
+  $opts = {} if (ref {} ne ref $opts);
 
   my $schema = $self->result_source->schema;
   my $nodes = $self->search(undef, { columns => 'mac' });
 
-  if (ref {} eq ref $opts
-      and exists $opts->{archive} and $opts->{archive}) {
-
+  if (exists $opts->{archive_nodes} and $opts->{archive_nodes}) {
       foreach my $set (qw/
         NodeIp
         NodeNbt
@@ -101,6 +100,10 @@ sub delete {
       # avoid letting DBIC delete nodes
       return 0E0;
   }
+  elsif (exists $opts->{keep_nodes} and $opts->{keep_nodes}) {
+      # avoid letting DBIC delete nodes
+      return 0E0;
+  }
   else {
       foreach my $set (qw/
         NodeIp

Netdisco/lib/App/Netdisco/Web/AdminTask.pm

@@ -78,7 +78,7 @@ ajax '/ajax/control/admin/delete' => require_role admin => sub {
         ->search({ip => param('device')});
 
       # will delete everything related too...
-      $device->delete;
+      $device->delete({archive_nodes => param('archive')});
     });
 };