maf5995r

I’ve created a work around for myself and I believe the problem is different than my initial suspicion.

Ticket http://trac.wordpress.org/ticket/1199 appears to be the bug I’ve encountered.

Here’s a summary:

When I create a custom structure for permalinks in the Options>Permalinks panel as:

/%category%/%postname%/

the generated permalink using the get_permalink() function does not include the %category% field.

For example, the incorrectly generated permalink is http://www.example.com//my-first-post/ for a post named “My First Post” in the “Website” category.

Initially, I considered this might be a permalink generation with %category% and Apache 1.x problem. See http://wordpress.org/support/topic/90171.

After working through some of the WordPress code, I believed it to be related to the WordPress 2.0+ caching problem mentioned elsewhere.
See http://trac.wordpress.org/ticket/1199 and http://wordpress.org/support/topic/55472.

However, disabling the cache through uncommenting define(‘DISABLE_CACHE’, true) in wp-settings.php did not fix my problem.
Additionally, there is no wp-contents/cache directory in my installation and the webserver does not have write permission in my httpdocs directory.

My configuration includes WordPress 2.0.4, Apache/1.3.27, PHP/4.2.2.

My observations included that in template-function-links.php, at line 55-61:

$category = ”;
if ( strstr($permalink, ‘%category%’) ) {
$cats = get_the_category($post->ID);
$category = $cats[0]->category_nicename;
if ( $parent=$cats[0]->category_parent )
$category = get_category_parents($parent, FALSE, ‘/’, TRUE) . $category;
}

get_the_category indeed returns an array with a single element, but there is no set category_nicename (nor cat_ID nor cat_name) for that element.

I added a few links of code to re-query the WordPress database when $category was not set as expected and this worked for me. Note, I know my installation contains a non-hierarchical set of categories and that only category is assigned to a single post and I did not work through a more general “fix”.

$category = ”;
if ( strstr($permalink, ‘%category%’) ) {
$cats = get_the_category($post->ID);
$category = $cats[0]->category_nicename;
if (!isset($category)) {
global $wpdb;
$dogs = $wpdb->get_results(“SELECT post_id, category_id FROM $wpdb->post2cat WHERE post_id=$post->ID;”);
$category_object = &get_category($dogs[0]->category_id);
$category = $category_object->category_nicename;
}
if ( $parent=$cats[0]->category_parent )
$category = get_category_parents($parent, FALSE, ‘/’, TRUE) . $category;
}

— Mark
MAFAdmin@gmail.com