[wp-hackers] Ordering categories in permalinks

[Andrew Nacin]

On Fri, Nov 5, 2010 at 8:17 PM, Otto <otto at ottodestruct.com> wrote:

> What WordPress defines as the "correct" url is determined by the
> results of get_permalink(). If you modify that, as I suggested, then
> you are redefining what the correct URL actually is.


According to the code in canonical.php that checks if the categories in the
URL are actually assigned to the post, they only need to be assigned to the
post to prevent a redirect, versus being what get_permalink() generates. So
if the post is actually in /business/, it shouldn't redirect to /politics/
even if WP thinks the permalink is /politics/.

This is also just the code as it exists currently in trunk, at least. This
may get more specific in the future.

What you need to do here is actually redefine what WordPress thinks is the
correct URL. This is not easily filterable in get_permalink(), but it is
doable. You'll note that in get_permalink(), we specifically order
categories by ID before choosing one. Obviously you want to handle the
ordering on your own and probably kill off category parent listing.

If someone can come up with a good way to filter the various moving gears
there, patches are welcome.