+ def __hash__(self) -> int:
+ hashable = [self.id_] + [getattr(self, name) for name in self.to_save]
+ for definition in self.to_save_relations:
+ attr = getattr(self, definition[2])
+ hashable += [tuple(rel.id_ for rel in attr)]
+ for name in self.to_save_versioned:
+ hashable += [hash(getattr(self, name))]
+ return hash(tuple(hashable))
+