next_post_link on custom taxonomy

Question

I want to use next_post_link and prev_post_link to return only the next post in my custom taxonomy of a custom post type. I have a custom post type called "work_posts" which has the taxonomy "work_categories" assigned. The category I want to show is called 'all'. I looked up get_adjacent_post in the "link-template.php" which has a few filters which should make it possible to make such a query but my SQL is not good enough to make the right query. The hooks are:

• get_{$adjacent}_post_join
• get_{$adjacent}_post_where
• get_{$adjacent}_post_sort

if I log a query in the join hook I get:

INNER JOIN wp_term_relationships AS tr 
ON p.ID = tr.object_id 
INNER JOIN wp_term_taxonomy tt 
ON tr.term_taxonomy_id = tt.term_taxonomy_id 
AND tt.taxonomy = 'category' 
AND tt.term_id IN (3)

how do I modify this to only show posts from my custom taxonomy?

Answer 1

Take a look at http://wordpress.org/extend/plugins/ambrosite-nextprevious-post-link-plus/ Its a plugin that adds extra missing functionality to next_post_link and prev_post_link functions.

Answer 2

I was with the same problem.

The correct plugin to be used to fix the problem is this.

And it seems that a bug is already reported here.