(self)
| 623 | self.ctx.transactions = self.ctx.transactions[: self.transaction_count] |
| 624 | |
| 625 | def rollback(self): |
| 626 | if len(self.ctx.transactions) > self.transaction_count: |
| 627 | self.engine.do_rollback() |
| 628 | self.ctx.transactions = self.ctx.transactions[: self.transaction_count] |
| 629 | |
| 630 | |
| 631 | class DB: |