def merge(self, message=""):
if len(self.operations) == 0:
raise NothingToMergeError("no operation to merge")
with prefix_collections(self.get_collection_name(), System, Node):
cloned_system = System.objects.get(name=self.system.name)
if self.system.last_transaction != cloned_system.last_transaction:
raise MustUpdateError("modification have been merge with the master, please update")
transaction = Transaction(self.system, self.operations, message)
transaction.save()
if self.system.last_transaction is None:
to_apply = Transaction.objects(system=self.system).order_by("_id")
else:
to_apply = Transaction.objects(system=self.system, id__gt=self.system.last_transaction.id).order_by("_id")
if len(to_apply) != 1:
return #FIXME
to_apply[0].apply(self.system)
to_apply[0].apply(cloned_system, self.get_collection_name())
self.operations = []
self.save()
