def _update_batch(device_ids, rack, dc):
for d in Device.objects.filter(id__in=device_ids):
name = d.get_name()
if name != 'unknown':
d.name = name
try:
model_type = DeviceType.raw_from_id(rack.model.type)
except AttributeError:
model_type = None
if model_type == 'rack':
d.rack = rack.sn
else:
d.rack = None
d.dc = dc.name.upper() if dc else None
d.save()
