Ticket #10786: 10786.diff

wp-includes/link-template.php

@@ -150 +151 @@
                        $author,
                        $post->post_name,
                );
+
+               foreach ( get_object_taxonomies( $post->post_type ) as $tax ) {
+                       $taxonomy = get_taxonomy($tax);
+                       if ( empty($taxonomy->rewrite) )
+                               continue;
+
+                       if ( strpos($permalink, "%{$taxonomy->rewrite['slug']}%") !== false ) {
+                               $rewritecode[] = "%{$taxonomy->rewrite['slug']}%";
+                               $terms = wp_get_object_terms( $post->ID, $taxonomy->name );
+                               if ( !is_wp_error($terms) && !empty($terms) ) {
+                                       usort($terms, '_usort_terms_by_ID');
+                                       $rewritereplace[] = $terms[0]->slug;
+                               } else {
+                                       $default_term = get_term( get_option( "default_{$taxonomy->name}" ), $taxonomy->name );
+                                       $rewritereplace[] = is_wp_error( $default_term ) ? '' : $default_term->slug;
+                               }
+                       }
+               }
+
                $permalink = get_option('home') . str_replace($rewritecode, $rewritereplace, $permalink);
                $permalink = user_trailingslashit($permalink, 'single');
                return apply_filters('post_link', $permalink, $post, $leavename);