[coldtea]

That's not data management. That's schema management (migration).

And yes, you have to script a change to every document.

[diverightin63]

Right. And I see. Are these managed by something like migrations?

[rralian]

Meteor doesn't have migrations built in, but there is a package for it. https://atmospherejs.com/percolate/migrations

[coldtea]

From my brief experience with Mongo no. But they are very easy to do in code.