I've decided to make a major change in my application which affects
more than 1 model. I don't want to wipe all the data though. Here's
the scenario I'm in:
I have a Book model with a Chapter model. Book has many Chapters and
Chapter belongs to Book. However, I want to add a Story model between
them so that Book has many Stories and Stories has many Chapters. Is
there a way I can make this change without wiping all my data?