Quote Originally Posted by Ren
Interesting, have you had the need use this functionality?
The same result can be achieved by being more explicit in the url-generating calls, i.e. supplying null values for the parameters after the one that was changed, but having this functionality built in makes things a fair bit simpler. In the end though, I didn't even consider if I would need it when I implemented it; I just made a bunch of test cases based on the behavior of the rails route class and hacked away until it all worked.