using inherited_resource, how do you customize collections use in belongs_to relationships

Question

Here's what I have:

https://gist.github.com/chewmanfoo/9791992

But the collections rendered in the form are as if the controller create action had not been run. (it renders Environment.all, Role.all).

I can't figure out how to customize those collections. Note that the change should not affect Environment and Role permanently (I can't change Environment so that it's collection is always filtered), I have to change the refreshes_controller.