Code review comment for lp:~edwin-grubbs/launchpad/bug-663861-product-series-timeout-part1

So, a few things here.
Patch #2208-26-0

I thought we had a function for this in the DB already? Could you have a look for it and preferentially use it?

If we don't have one, this seems fine - but I think you should follow this patch up with a test that you get the sort order you expect.