Use custom taxonomies with get_adjacent_post()

[zerzix]

I would like to use Hierarchical taxonomies in the Get_adjacent_post() function in the pace of the hard coded category. I feel that this is a needed enhancement with the enhanced custom taxonomy functions.

[zerzix]

diff for get_adjacent_post, not tested

[nacin]

We need to prepare those strings then. We might want to also double-check get_taxonomies to make sure the requested taxonomy is registered.

[Frumph]

​http://wp.pastebin.com/0HrdkPrQ

[SergeyBiryukov]

Turned Frumph's solution into a patch.

[Frumph]

@Sergey Please double check the apply_filters part where I added the _${taxonomy} part if that would work or not, that's an area i'm not familiar with

[SergeyBiryukov]

It seems that the function is not working as is, since there is no post taxonomy.

[Frumph]

​http://wp.pastebin.com/j61WThB6

Yep, okay here's a different route,

Excerpt:

function get_adjacent_post($in_same_category = false, $previous = true, $excluded_categories = '', $taxonomy = '') {
	global $post, $wpdb;
	
	if ( empty( $post ) || ( !empty($taxonomy) && !taxonomy_exists( $taxonomy ) ) )
		return null;

If it's an empty post, or it's not an empty taxonomy && the taxonomy doesn't exist, return null

that should be a good sanity check on the taxonomy

[scribu]

Marking as duplicate of #17807 (newer patch).