migration_data

https://github.com/ka8725/migration_data

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 classes in the migrations or write raw SQL. But they don't help in 100% cases anyway. This gem promises to solve the problem in a simple way.