Rails Schema changes unintentionally whenever I run rake db:migrate

Question

Whenever I run rake db:migrate, it updates my rails Schema by removing the foreign keys on one particular table. I can't understand why and I'm not sure how to prevent this from happening.

[1] http://imgur.com/BBssPdU

How can I solve this problem? I can't write another migration to re-add references because it throws a duplication error.

Answer 1

Could you please post the full migration file?

Also, have you tried rolling back to before the last migration using rake db:rollback ? (You can also rollback several migrations, see here )

CARE! Rolling back can delete data from your database so if you cannot afford to have that happen then perhaps this isn't the best solution.