def edit_center(request, center):
    center = get_object_or_404(Center, pk=center, user=request.user)

    if request.method == 'POST':
        form = CenterForm(request.POST, instance=center)
        if form.is_valid():
            center = form.save()
            return redirect('show_center', center=center.pk)
    else:
        form = CenterForm(instance=center)
    return render_to_response('supercomputer/edit_center.html', locals(),\
                             context_instance=RequestContext(request))
def add_center(request):
    if request.method == 'POST':
        form = CenterForm(request.POST)
        if form.is_valid():
            center = form.save(commit=False)
            center.user = request.user
            center.save()
            return redirect('show_center', center=center.pk)
    else:
        form = CenterForm
    return render_to_response('supercomputer/add_center.html', locals(),\
                             context_instance=RequestContext(request))