We found a data-loss bug that alembic downgrade ran clean

📰 Dev.to · croc100

Learn how to identify and mitigate data-loss bugs in alembic downgrades, even when they run cleanly without errors

intermediate Published 5 Jun 2026
Action Steps
  1. Run alembic downgrade with verbose logging to detect potential issues
  2. Monitor database changes and verify data integrity after downgrades
  3. Test downgrade scenarios with sample data to identify potential data-loss bugs
  4. Configure alerts and notifications for monitoring tools to detect anomalies
  5. Review and audit database migration scripts for potential data-loss vulnerabilities
Who Needs to Know This

Developers and DevOps engineers on a team can benefit from understanding how to detect and prevent data-loss bugs, especially when working with database migrations and downgrades

Key Insight

💡 Data-loss bugs can occur even when alembic downgrades run cleanly, emphasizing the need for thorough testing and monitoring

Share This
🚨 Data-loss bug found in alembic downgrade! 🚨 Learn how to identify and mitigate these issues, even when downgrades run clean #alembic #database #migration

Key Takeaways

Learn how to identify and mitigate data-loss bugs in alembic downgrades, even when they run cleanly without errors

Full Article

alembic downgrade -1 ran clean. No errors. Monitoring went green. The users' phone numbers were...
Read full article → ← Back to Reads