def ajax_extra_fields_form(request, host_type_id, prefix="", blank=False):
"""
Return raw html (tr) AdditionnalFieldForm for given host_type_id.
blank parametter allow to have empty fields instead of defaults.
"""
try:
host_type = get_object_or_404(HostType, pk=host_type_id)
except:
return HttpResponse("<tr></tr>")
form = AdditionnalFieldForm(host_type=host_type, blank=bool(blank), prefix=prefix)
return HttpResponse(form.as_table())
