Web Reference: Jun 30, 2025 · In Python, the commit () and rollback () methods play an essential role in database transactions, ensuring atomicity, consistency, isolation, and durability (ACID properties). Apr 24, 2025 · If a Model or DAO wants to signal the caller that an error has occurred, then raise an error, which bubbles up to the caller and the caller should handle it by doing a rollback at that level. If no error occurs after the call to the Model or DAO finishes, then commit at that level. Use commit () to make changes permanent and rollback () to undo changes. Always use try-except blocks for robust transaction management in production applications.
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