Parent (relative) redirects in actions

[caprica]

I have a somewhat depressingly complex routing structure, and at the end of some routes I have a master-detail arrangement.

It's something like this, there are various levels of nested layouts, and clean-break layouts, which is why you see usage of _.

user.edit._section_.invoices._layout.$id.tsx                   // master screen
user.edit._section_.invoices._layout.add.tsx                   // add new record
user.edit._section_.invoices._layout_.$id_.debtor.tsx          // detail screen
user.edit._section_.invoices._layout_.$id_.order.tsx           // detail screen

In the action for the detail screens, 'debtor' and 'order' I return redirect.

So I'm here:

user.edit._section_.invoices._layout_.$id_.debtor.tsx
/user/edit/invoices/131231313/debtor

I want to return redirect('..') so I go back to the parent, which I thought naively would be this:

user.edit._section_.invoices._layout.$id.tsx
/user/edit/invoices/131231313

But it actually goes further up the router path:

/user/edit

Is there some way I can get the parent redirect behaviour I want? I really wanted to avoid an absolute redirect path here.