Combine category AND custom taxonomy in permalink structure

Question

It seems like this question has been asked not infrequently, but I still can't make heads of it. I followed the Rewrite API Guide to look at how to merge, but I want something like this:

Category = categories, built in. Food = custom taxonomy.

When I enter http://mysite.com/food/category to find all posts in that category and that foot type, similar to

http://mysite.com/index.php?category=category&food=food

I'll also have pages, which aren't attached to a "food" or category, and the permalink fails if i simply put %foood%/%category%/ into the permalink settings.

Does anyone have any recommendations?

Answer 1

What I ended up doing was setting up an endpoint for food, like so:

global $wp_rewrite;
$wp_rewrite->add_endpoint( 'food', EP_PERMALINK | EP_PAGES );
$wp_rewrite->flush_rules();

function printview_query_vars($vars)
{ array_push($vars, 'food');
  return $vars;
}
add_filter('query_vars','printview_query_vars');

Then I'd get a url like http://mysite/pagename/food/fruits/shelves/ and the wp_query would contain something like food=>fruits/shelves, which then i can parse myself into a custom query.