Wordpress including Custom Posts in Taxonomy Archives

Hooks and sample code to get your custom posts listed in taxonomy listings.

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By default the archive loop for custom taxonomies in WordPress only queries pages and posts. And the chances are that if you have defined a custom taxonomy you also have custom post-types. Here are a couple of hooks that allow some pretty nice customisations of this previous limitation.

This code needs to go in your functions.php file, or in a plugin. The XXXX is the identifying name of the particular taxonomy which you would like to adjust.

add_filter('XXXX_taxonomy_query_posttypes', 'XXXX_taxonomy_query_posttypes');
function XXXX_taxonomy_query_posttypes($ptypes)
	// example usage
	unset($ptypes['post']);			// this removes the default post-type 'post' from appearing in the taxonomy listing
	$ptypes['case_study'] = 'case_study';   // this includes our custom-post-type 'case_study' in the taxonomy listing
	return $ptypes;

add_action( 'pre_get_posts', 'filterable_post_types_to_tax_query' );
function filterable_post_types_to_tax_query( $query ) {
	if ( is_tax() && $query->is_main_query() && !is_admin())
		$current_term = get_queried_object();
		$post_types = array('page'=>'page', 'post'=>'post');
		$post_types = apply_filters($current_term->taxonomy.'_taxonomy_query_posttypes', $post_types);
		$query->set( 'post_type', array_keys($post_types) );		
	return $query;
Published on: 12th April 2013
Categorised in: code
Tagged with: php, wordpress

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