terms - Read For Learn

Is there a filter/action to add content to WP admin metaboxes?

I couldn’t find a hook so I went with the JS option. add_action( “admin_head-post-new.php”, ‘meta_box_instruction’ ); //new post add_action( “admin_head-post.php”, ‘meta_box_instruction’ ); //edit post function meta_box_instruction($d) { global $post; if($post->post_type == ‘{YOUR POST TYPE}’ || $_GET[‘post_type’] == ‘{YOUR POST TYPE}’): ?> <script type=”text/javascript”> jQuery(document).ready(function(){ jQuery(‘<p>Some instruction</p>’).insertBefore(‘#taxonomy-{YOUR TAXONOMY NAME}’).parent(); }); </script> <?php endif; }

show tags of custom post type ONLY

The above solutions work correctly but aren’t exactly optimized. Here’s a method that queries that database ONCE for the data you’re looking for, and gives you a list of term objects. It can accept a post_type argument, and if one is not supplied, will use the post_type of the current global $post object. function post_type_tags( … Read more

How are terms connected with posts in database?

The posts are related to taxonomies (taxonomy/tag) in the wp_3_term_relationships table, where the object_id column is the post’s id, and the term_taxonomy_id is the taxonomy/tag id. Depending on what you want to accomplish, the solution might be to create the same taxonomies at each blog. This way the tax_query should work as normal.

I have a term_taxonomy_id — is there an API call to get the taxonomy?

I was pretty sure of this, but the answer is—at least for now—a definitive no. There isn’t an API call for it. To double-check, I asked core developer Andrew Nacin about this on Twitter. His response: term_taxonomy_id is, for the moment, essentially private. You should likely never have it to use it. It might be … Read more

How can I select a primary category?

There is no concept of “primary” term in WordPress. Taxonomies are grouping mechanism. Post belongs to multiple terms on equal terms (no pun intended). No term is “more” of a group than the rest. From brief description of your use case, intuitively Artists would be much better defined as CPT too. But then it comes … Read more

Elegant way to add parent categories?

wp_set_post_terms() uses wp_set_object_terms(). There is an action hook called set_object_terms which fires on successful setting of an object’s terms. The action hook looks like this do_action ( ‘set_object_terms’, int $object_id, array $terms, array $tt_ids, string $taxonomy, bool $append, array $old_tt_ids ) What we can do here is, inside our action callback function, we can check … Read more

Child terms from multiple parents?

We can filter the generated SQL query through the terms_clauses filter before the SQL query is executed. What we will be doing is to introduce a new parameter called wpse_parents which will accept an array of parent term ID’s to get children from. Note, this new parameter works exactly the same as the build-in parameter, … Read more

wp_list_categories: order by term order?

The wp_list_categories() function calls the get_categories() function, that’s a wrapper for the get_terms() function, that creates an instance of the WP_Term_Query class. It doesn’t look like it supports ordering by term order. If the plugin uses the term_order column in the wp_terms table, then you can try to add a support for it’s ordering, via … Read more

Front End Post Save Child terms

With saving child terms, I believe you can add them to the $term_array group where the parent lives. From the perspective of a post (or custom post type) saving the taxonomy has nothing to do with parent or child. The WP Codex states “For hierarchical terms (such as categories), you must always pass the id … Read more

List Hierarchical Term List with Count with Related Term

I’ve done something like this in the Query Multiple Taxonomies plugin: https://github.com/scribu/wp-query-multiple-taxonomies/blob/master/core.php The good news is that it’s a generic solution: it works for any combination of posts and taxonomies. The bad news is that it might take some effort to figure out how it’s done.

+ More