Method backwards_plan

tortoise/migrations/graph.py:134–137

(self, target: MigrationKey)

        return self._iterative_dfs(self.node_map[target], forwards=True)

    def backwards_plan(self, target: MigrationKey) -> list[MigrationKey]:
        if target not in self.nodes:
            raise ValueError(f"Unknown migration target {target}")
        return self._iterative_dfs(self.node_map[target], forwards=False)

    def _iterative_dfs(self, start: Node, *, forwards: bool) -> list[MigrationKey]:
        visited: list[MigrationKey] = []