Hello,
I’m trying to show a field group when a certain custom taxonomy term, or its children, is selected. I know out of the box the Post Taxonomy rule only applies to a single term, so I need to define a custom rule.
I copied most of the code below from the Post Taxonomy rule source code. However, the field group only “flashes” then hides itself again when I select a child term. Totally works if I pick a parent term though.
Any help is appreciated. I’m on PRO v5.3.10. Thanks!
function acf_rule_values_taxonomy_tree( $choices ) {
$choices = acf_get_taxonomy_terms();
// unset post_format
if( isset($choices['post_format']) ) {
unset( $choices['post_format']) ;
}
return $choices;
}
add_filter( 'acf/location/rule_values/taxonomy_tree', 'acf_rule_values_taxonomy_tree' );
function acf_rule_match_taxonomy_tree( $match, $rule, $options ) {
// bail early if not a post
if( !$options['post_id'] ) return false;
$data = acf_decode_taxonomy_term( $rule['value'] );
$term = get_term_by( 'slug', $data['term'], $data['taxonomy'] );
$term_id = (int)$term->term_id;
$term_children = get_term_children($term_id, $data['taxonomy']);
array_push($term_children, $term_id);
// bail early if no term
if( !$term ) return false;
// post type
if( !$options['post_type'] ) {
$options['post_type'] = get_post_type( $options['post_id'] );
}
// get terms
// - allow an empty array (sent via JS) to avoid loading the real post's terms
$terms = $options['post_taxonomy'];
if( !is_array($terms) ) {
$terms = wp_get_post_terms( $options['post_id'], $term->taxonomy, array('fields' => 'ids') );
}
// If no terms, this is a new post and should be treated as if it has the "Uncategorized" (1) category ticked
if( empty($terms) ) {
$terms = array( 1 );
}
// compare
if( $rule['operator'] == "==") {
$match = in_array($terms[0], $term_children);
} elseif( $rule['operator'] == "!=") {
$match = !in_array($terms[0], $term_children);
}
return $match;
}
add_filter( 'acf/location/rule_match/taxonomy_tree', 'acf_rule_match_taxonomy_tree', 10, 3 );
