attach volume while status is 'creating'

Attaching a volume that has status 'creating' throws an exception that isn't handled yet.
It's reproducible in the current bazaar branch.

NovaServerError at /project/myproject/volumes/attach
Bad Request
Request Method: POST
Request URL: http://10.0.2.116:8000/project/myproject/volumes/attach
Django Version: 1.2.3
Exception Type: NovaServerError
Exception Value:
Bad Request
Exception Location: /root/src/django-nova/trunk/src/django_nova/exceptions.py in decorator, line 80
Python Executable: /root/src/openstack-dashboard/trunk/.dashboard-venv/bin/python
Python Version: 2.6.6
Python Path: ['/root/src/openstack-dashboard/trunk/dashboard', '/root/src/openstack-dashboard/trunk/.dashboard-venv/lib/python2.6/site-packages/setuptools-0.6c11-py2.6.egg', '/root/src/openstack-dashboard/trunk/.dashboard-venv/lib/python2.6/site-packages/pip-0.8.1-py2.6.egg', '/root/src/django-nova/trunk/src', '/root/src/openstack-dashboard/trunk/.dashboard-venv/lib/python2.6/site-packages/mox-0.5.3-py2.6.egg', '/root/src/openstack-dashboard/trunk/.dashboard-venv/lib/python2.6', '/root/src/openstack-dashboard/trunk/.dashboard-venv/lib/python2.6/plat-linux2', '/root/src/openstack-dashboard/trunk/.dashboard-venv/lib/python2.6/lib-tk', '/root/src/openstack-dashboard/trunk/.dashboard-venv/lib/python2.6/lib-old', '/root/src/openstack-dashboard/trunk/.dashboard-venv/lib/python2.6/lib-dynload', '/usr/lib/python2.6', '/usr/lib/python2.6/plat-linux2', '/usr/lib/python2.6/lib-tk', '/usr/lib64/python2.6/lib-tk', '/root/src/openstack-dashboard/trunk/.dashboard-venv/lib/python2.6/site-packages', '/root/src/openstack-dashboard/trunk', '/root/src/openstack-dashboard/trunk/dashboard', '/root/src/openstack-dashboard/trunk/dashboard']
Server time: Fri, 4 Feb 2011 02:22:19 -0800

Environment:

Request Method: POST
Request URL: http://10.0.2.116:8000/project/myproject/volumes/attach
Django Version: 1.2.3
Python Version: 2.6.6
Installed Applications:
['dashboard',
 'django.contrib.auth',
 'django.contrib.admin',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.comments',
 'django.contrib.sites',
 'django.contrib.markup',
 'django.contrib.syndication',
 'django_nose',
 'django_nova',
 'registration']
Installed Middleware:
('django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.middleware.doc.XViewMiddleware')

Traceback:
File "/root/src/openstack-dashboard/trunk/.dashboard-venv/lib/python2.6/site-packages/django/core/handlers/base.py" in get_response
  100. response = callback(request, *callback_args, **callback_kwargs)
File "/root/src/openstack-dashboard/trunk/.dashboard-venv/lib/python2.6/site-packages/django/contrib/auth/decorators.py" in _wrapped_view
  25. return view_func(request, *args, **kwargs)
File "/root/src/django-nova/trunk/src/django_nova/exceptions.py" in decorator
  90. return func(*args, **kwargs)
File "/root/src/django-nova/trunk/src/django_nova/views/volumes.py" in attach
  112. form.cleaned_data['device']
File "/root/src/django-nova/trunk/src/django_nova/exceptions.py" in decorator
  80. raise NovaServerError(e)

Exception Type: NovaServerError at /project/myproject/volumes/attach
Exception Value: Bad Request