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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' => $post_id | |
) | |
); | |
} | |
//run the update function whenever a post is created or edited | |
add_action('save_post', 'update_custom_terms'); |
if anyone is interested I wrote a simple addition to this script that will create a custom meta field for your taxonomy, I named it post_id but you can name it whatever you like and have the script save to that custom field instead of the taxonomies description.
Any idea on how to auto-populate a taxonomy with another custom taxonomy entries ?
@dennisaskeland @burnified @brenna
Any idea on how to auto-populate a taxonomy with another custom taxonomy entries ?
@dennisaskeland @burnified
For anyone interested, you can auto select the created taxonomy by replacing this code:
wp_insert_term($term_title, 'location', array(
'slug' => $term_slug,
'description' => $post_id
)
);
With this code:
wp_set_object_terms( $post_id, $term_title, $tax, false );
The last argument is to set whether you're appending or replacing. Set it false to replace any currently selected terms.
I love this solution for generating taxonomy terms based on post types, however I was looking for a solution that didn't rely on term descriptions, since I needed to use those in my theme. I ended up using get_term_meta()
and update_term_meta()
instead of term descriptions.
Modified function below:
foreach($existing_terms as $term) {
$related_post_id = get_term_meta($term->term_id, 'related_post_id', true);
if ($related_post_id == $post_id) {
//term already exists, so update it and we're done
wp_update_term($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,
) );
/*
* Add term meta to new term
*/
$new_term = get_term_by('slug', $term_slug, 'my-taxonomy');
if ( $new_term ) {
update_term_meta($new_term->term_id, 'related_post_id', $post_id);
}
@badfeather Could you please explain why you had to go this route?
@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!
One up for auto delete function to be added. And whole snippet moved to a plugin with dynamically changeable CPTs, thumbs up