Learn how to use SQLAlchemy ORM Events to automate tasks like password hashing, sending emails, and updating timestamps. This guide covers Mapper, Session, and Attribute events with practical examples to write cleaner, more maintainable backend code.

Heval Hazal Kurt

General Programming

Community Picks is a section on daily.dev where our community members share the most interesting and valuable content they've discovered online. From insightful articles to handy tools, every post is a gem curated by our dedicated coomunity. To contribute to Community Picks, you need to have at least 250 reputation points, ensuring that only active and trusted members can share their finds.

Community Picks

SQLAlchemy events provide a powerful way to automate backend tasks by listening to database operations. The guide demonstrates how to use mapper events (before_insert, after_insert, before_update) for model-specific logic like password hashing and email notifications, attribute events for tracking field changes, and session events (before_flush) for cross-model operations like timestamp management. These events help separate business logic from application code, creating cleaner and more maintainable backends.

Putting Your Backend on Autopilot with SQLAlchemy Events

The scenario → Welcome to “CodeCrafters”

The two flavors of events → Mapper vs. Session