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December 26, 2022 23:29
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WordPress function to auto-populate a taxonomy with a custom post type's entries.
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function custom_tax_init(){ | |
//set some options for our new custom taxonomy | |
$args = array( | |
'label' => __( 'My Custom Taxonomy' ), | |
'hierarchical' => true, | |
'capabilities' => array( | |
// allow anyone editing posts to assign terms | |
'assign_terms' => 'edit_posts', | |
/* but you probably don't want anyone | |
* except admins messing with what | |
* gets auto-generated! */ | |
'edit_terms' => 'administrator' | |
) | |
); | |
// create the custom taxonomy and attach it to a custom post type | |
register_taxonomy( 'my-taxonomy', 'post-type-A', $args); | |
} | |
add_action( 'init', 'custom_tax_init' ); | |
function update_custom_terms($post_id) { | |
// only update terms if it's a post-type-B post | |
if ( 'post-type-B' != get_post_type($post_id)) { | |
return; | |
} | |
// don't create or update terms for system generated posts | |
if (get_post_status($post_id) == 'auto-draft') { | |
return; | |
} | |
/* | |
* Grab the post title and slug to use as the new | |
* or updated term name and slug | |
*/ | |
$term_title = get_the_title($post_id); | |
$term_slug = get_post( $post_id )->post_name; | |
/* | |
* Check if a corresponding term already exists by comparing | |
* the post ID to all existing term descriptions. | |
*/ | |
$existing_terms = get_terms('my-taxonomy', array( | |
'hide_empty' => false | |
) | |
); | |
foreach($existing_terms as $term) { | |
if ($term->description == $post_id) { | |
//term already exists, so update it and we're done | |
wp_update_term($term->term_id, 'my-taxonomy', array( | |
'name' => $term_title, | |
'slug' => $term_slug | |
) | |
); | |
return; | |
} | |
} | |
/* | |
* If we didn't find a match above, this is a new post, | |
* so create a new term. | |
*/ | |
wp_insert_term($term_title, 'my-taxonomy', array( | |
'slug' => $term_slug, | |
'description' => $post_id | |
) | |
); | |
} | |
//run the update function whenever a post is created or edited | |
add_action('save_post', 'update_custom_terms'); |
@samabp Sure. I needed to use category/term descriptions for what they're intended for (writing a description of that category/term). It seemed to make more sense to take advantage of taxonomy term meta to save these relationship ID values, rather than hacking them into the description field.
@badfeather Thanks a lot, makes sense to me.
Is there a way to use woocommerce product attributes (which is a custom taxonomy) with this code?
Thanks!
hi @caesarsamsi, I wrote this a very long time ago and am not familiar with woocommerce so I'm not sure if that's possible or not. good luck!
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@badfeather Could you please explain why you had to go this route?