Cursor
database
Database Migration Rollback Fails After Cursor Changes
After Cursor generated new database migration files, attempting to roll back to a previous version fails with syntax errors or constraint violations. The database is left in an inconsistent state.
The down migration (rollback) may be malformed or incompatible with the current schema.
Error Messages You Might See
ERROR: relation "table_name" does not exist
ERROR: constraint "fk_name" does not exist
ERROR: column "col_name" does not exist
Migration failed to rollback
Common Causes
- Down migration uses incorrect column names that don't match up migration
- Foreign key constraints prevent dropping columns in rollback
- Rollback migration missing proper error handling or transaction wrapping
- Index names or constraint names don't match between up and down
- Rollback attempts to drop non-existent columns or tables
How to Fix It
Verify down migrations are exact reverses of up migrations. Wrap in transactions: BEGIN; ... ROLLBACK;. Check column/index names match. Test rollback on development database first. Use DROP IF EXISTS for safety.
Real developers can help you.
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Expertise:
💡 Developing cross-platform apps using Flutter, Dart, and Jetpack Compose for Android, iOS, and Web.
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🎯 Revamped the Vepaar app into Vepaar Store & CRM with a 2x performance boost and smoother UX.
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🎖️ Worked on improving app performance and user experience with smart solutions.
Milan is always happy to connect, work on new ideas, and explore the latest in technology.
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I'm fronted developer with 10+ years of experience with big projects. I have small backend background too
You don't need to be technical. Just describe what's wrong and a verified developer will handle the rest.
Get HelpFrequently Asked Questions
How do I manually fix a failed migration?
Connect to DB and manually run the down migration SQL. Update migration table to mark migration as reverted.
Can I edit a migration after it's run?
No. Create a new migration to fix the issue. Never edit run migrations.