custom-taxonomy

How to modify a taxonomy that’s already registered

register_taxonomy() is the tool for the job. From the Codex: This function adds or overwrites a taxonomy. One option would be to copy the register_taxonomy() $args and modify them. However, that would mean that any future changes to the original register_taxonomy() code would be overwritten. Therefore, at least in this case, it’s preferable to get … Read more

Display all posts in a custom post type, grouped by a custom taxonomy

So, you might consider automating the multiple queries. First, get the list of terms in your custom taxonomy, using get_terms(): <?php $member_group_terms = get_terms( ‘member_group’ ); ?> Then, loop through each one, running a new query each time: <?php foreach ( $member_group_terms as $member_group_term ) { $member_group_query = new WP_Query( array( ‘post_type’ => ‘member’, ‘tax_query’ … Read more

Remove taxonomy slug from a custom hierarchical taxonomy permalink

UPDATE Since writing this WordPress core has added the ‘do_parse_request’ hook that allows URL routing to be handled elegantly and without the need to extend the WP class. I covered the topic in-depth in my 2014 Atlanta WordCamp talk entitled “Hardcore URL Routing“; the slides are available at the link. ORIGINAL ANSWER URL Design has … Read more

How can I get only parent terms?

Yes, just pass in the parent parameter to get_terms when you call it, as Michael pointed out. Since WP 4.5 this is the recommend usage: $myterms = get_terms( array( ‘taxonomy’ => ‘taxonomy_name’, ‘parent’ => 0 ) ); Prior to WP 4.5 this was the default usage: $myterms = get_terms( ‘taxonomy_name_here’, array( ‘parent’ => 0 ) … Read more

get_posts assigned to a specific custom taxonomy term, and not the term’s children

In looking at the WP_Tax_Query class in /wp-includes/taxonomy.php, I found that there is a ‘include_children’ option which defaults to true. I modified my original get_posts() call with the following, and it works great: $pages = get_posts(array( ‘post_type’ => ‘page’, ‘numberposts’ => -1, ‘tax_query’ => array( array( ‘taxonomy’ => ‘taxonomy-name’, ‘field’ => ‘term_id’, ‘terms’ => 1, … Read more

“tax_query” parameter not working with WP_Query

The tax_query parameter is an array of arrays, not just an array. This: ‘tax_query’ => array( ‘taxonomy’ => ‘video_type’, ‘terms’ => ‘episode’, ‘field’ => ‘slug’, ‘include_children’ => true, ‘operator’ => ‘IN’ ), Should instead be this: ‘tax_query’ => array( array( ‘taxonomy’ => ‘video_type’, ‘terms’ => ‘episode’, ‘field’ => ‘slug’, ‘include_children’ => true, ‘operator’ => ‘IN’ … Read more

How to Add Custom Fields to a Custom Post Type?

This is probably more complicated than you think, I would look into using a framework: http://wpgear.org/#meta-fields If you want to write your own , here are some decent tutorials: http://net.tutsplus.com/tutorials/wordpress/creating-custom-fields-for-attachments-in-wordpress/ http://sltaylor.co.uk/blog/control-your-own-wordpress-custom-fields/ http://thinkvitamin.com/code/create-your-first-wordpress-custom-post-type/

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