Did you ever figure this out? I want to achieve exactly the same!
Right now, I have the following setup (I used item & collection to match your example);
In my post type I have the following rewrite set:
'rewrite' => array('slug' => 'item/%collection%'),
And a function that replaces %collection% for the acf value:
function setupItemPermalink($post_link, $id = 0) {
$post = get_post($id);
if (is_object($post) && get_post_type($post) == 'item') {
$collection = get_field('item_collection', $post->ID);
if ($collection) {
$collection = get_post($collection[0]); // get first in array
return str_replace('%collection%' , $collection->post_name, $post_link);
} else {
$other = sanitize_title(__('not-in-collection', 'mydomain'));
return str_replace('%collection%' , $other, $post_link);
}
}
return $post_link;
}
add_filter('post_type_link', 'setupItemPermalink', 1, 3);
This part works! When I use the_permalink for an item, it outputs:
http://www.mydomain.com/item/collection-name/item-slug/
But I’m not sure how I should setup my rewrites?
This is not working:
global $wp_rewrite;
$item_structure = '/item/%collection%/%item%/';
$wp_rewrite->add_rewrite_tag('%item%', '([^/]+)', 'item=');
$wp_rewrite->add_permastruct('item', $item_structure, false);
Any ideas?
