def update_xform_uuid(username, id_string, new_uuid):
xform = XForm.objects.get(user__username=username, id_string=id_string)
# check for duplicate uuid
count = XForm.objects.filter(uuid=new_uuid).count()
if count > 0:
raise DuplicateUUIDError("An xform with uuid: %s already exists" %
new_uuid)
xform.uuid = new_uuid
xform.save()
def get_instance_or_404(**criteria):
"""
Mimic `get_object_or_404` but handles duplicate records.
`logger_instance` can contain records with the same `uuid`
:param criteria: dict
:return: Instance
"""
instances = Instance.objects.filter(**criteria).order_by("id")
if instances:
instance = instances[0]
xml_hash = instance.xml_hash
for instance_ in instances[1:]:
if instance_.xml_hash == xml_hash:
continue
raise DuplicateUUIDError(
"Multiple instances with different content exist for UUID "
"{}".format(instance.uuid))
return instance
else:
raise Http404