Rake tasks to migrate data alongside schema changes.

Sometimes we have to write some Rails code in the migrations and it's hard to keep them in working state because models wich are used there changes too often. there some techniques which help to avoid these pitfalls. For example, define model ...

Switching between branches with migrations and running them can make your DB inconsistent and not working in another branch if not roll the migration back. Install this gem and forget about that issue by running the standard rake db:migrate.