[wp-trac] [WordPress Trac] #13471: Pagination in Blog Post Won't Display Past Page 1

[WordPress Trac]

#13471: Pagination in Blog Post Won't Display Past Page 1
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 Reporter:  krowland08    |       Owner:                                 
     Type:  defect (bug)  |      Status:  new                            
 Priority:  normal        |   Milestone:  Awaiting Review                
Component:  Formatting    |     Version:  3.0                            
 Severity:  normal        |    Keywords:  pagination, nextpage, permalink
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Comment(by Killing):

 Yes been chasing this today :(

 The cause is the fix applied in r13781 of wp-includes/canonical.php which
 added the following code to fix #11807


 {{{
 } elseif ( is_single() && strpos($wp_rewrite->permalink_structure,
 '%category%') !== false ) {
            $category = get_term_by('slug', get_query_var('category_name'),
 'category');
            $post_terms =
 wp_get_object_terms($wp_query->get_queried_object_id(), 'category',
 array('fields' => 'tt_ids'));
            if ( (!$category || is_wp_error($category)) || (
 !is_wp_error($post_terms) && !empty($post_terms) &&
 !in_array($category->term_taxonomy_id, $post_terms) ) )
                $redirect_url =
 get_permalink($wp_query->get_queried_object_id());
 }}}



 The problem is that get_term_by doesn't support hierarchies so when passed
 a second level category e.g. cars/sports it will fail and hence the
 rewrite is performed loosing the page information.

 The following fixes this but I'm not 100% that the intention is to only
 check the last category in the hierarchy, although with our data anything
 more would appear to fail. This may indicate that additional fixes are
 required but anyway:-

 {{{
 $category = get_term_by('slug', end( explode( '/',
 get_query_var('category_name') ) ), 'category') ;
 }}}

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Ticket URL: <http://core.trac.wordpress.org/ticket/13471#comment:4>
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