Use migrations like in Django in Rails models

I was developing in both RoR and Django based projects, and I don't like the way how RoR deals with migrations. For example, if I make huge changes to my models over 2 years, in Django I can delete all migrations and make new, single file, basing on actual state of my models. In RoR I will have, like 50 files, where some of them may be absolutely redundant (correct me if I'm wrong).

I would like to have RoR app, that would create migration basing on models, like in Django (so I assume models would need some information about fields).

Is there any gem/framework to RoR, that would add such feature?