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1. Chris Sealey
   Member
   Posted 2 years ago #
   

   Can't seem to find this anywhere. Does anyone know how to get a list of all tags used by a custom post type?

   So if I have posts, pages and books, I want to return a list of all tags, but only if they're used on books. If they're used elsewhere, don't return them.

   Doesn't sound too hard, but I can't find any samples of anyone doing this.

   Cheers.

2. Chris Sealey
   Member
   Posted 2 years ago #
   

   Decided to take a different approach with this.

3. webleo
   Member
   Posted 1 year ago #
   

   I faced the same problem.
   Originally, I was going to solve it with this:
   http://wordpress.org/support/topic/custom-post-types-and-tag-cloud?replies=8
   but that solution seems a bit inefficient because of the need to get each and every post's tags and then to remove duplicates.

   I ended up doing this:
   

   function custom_posts_per_tag($id, $post_type){
   
   	$args = array(
           'post_type' => array($post_type),
           'posts_per_page' => -1,
   				'tag_id' => $id
     );
   
   	$the_query = new WP_Query( $args );
   	wp_reset_query();
   
   	return sizeof($the_query->posts);
   }
   
   $tags = get_tags();
   global $wp_query;
   $post_type = $wp_query->get('post_type');
   
   foreach ($tags as $tag){
   	if (custom_posts_per_tag($tag->term_id, $post_type) > 0) {
   		/* Print tag link or whatever you wish here */
   	}
   }

   I assume that WP_Query uses a more efficient way to filter posts by tags, than getting each post's tag, but I might be wrong.

4. Andrew Tegenkamp
   Member
   Posted 1 year ago #
   

   I created a custom taxonomy for the custom post type and used

   $myList = get_categories('taxonomy=demographic&orderby=name');

   which gives me an object array of everything.

   Hope that helps someone,
   Andrew

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