Reply To: Field group for Taxonomy Term MIA

• mhigley

• July 27, 2022 at 8:27 pm

Here’s my code if it’s of any help to others.

This is my solution to adding custom fields targeting specifically the children of parent categories.
i.e.:

• Locations
  • Los Angeles, CA
  • Denver, CO
  • New York, NY

(Credit to Kellen Mace for the snippet on finding the current category edit page. Link in the code.)

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly
}

class ACF_Category_Name_Location extends ACF_Location {
    public function initialize() {
        $this->name         = 'category_name';
        $this->category     = __( 'Category', 'acf');
        $this->label        = __( 'Category Name', 'acf' );
        $this->object_type  = 'post';
    }

    public function get_values( $rule ) {
        $choices = array();

        // Load all category terms, loop over them and append to choices.
        $terms = get_terms( array(
            'taxonomy' => 'category',
            'orderby' => 'name',
            'hide_empty' => false,
            'parent' => 0,
        ) );

        if( $terms ) {
            foreach( $terms as $term ) {
                $choices[ $term->term_id ] = $term->name;
            }
        }

        return $choices;
    }

    public function match( $rule, $screen, $field_group ) {
        /**
         * https://kellenmace.com/get-term-edited-term-php-wordpress-admin-page/
         */
        // Get the term currently being edited on the edit.php screen in the WP admin.
        global $taxnow;

        if ( ! $taxnow || empty( $_GET['tag_ID'] ) ) {
            return false;
        }

        $term_id = absint( $_GET['tag_ID'] );
	    $term    = get_term( $term_id, $taxnow );

        // return false if not and instance of WP_Term
        if ( ! $term instanceof WP_Term ) {
            return false;
        }

        // Compare the selected terms parent to rule value.
        $result = ( $term->parent == $rule['value'] );

        // Return result taking into account the operator type.
        if( $rule['operator'] == '!=' ) {
            return !$result;
        }

        return $result;
    }
}