This is a copy of my example here https://github.com/Hube2/acf-filters-and-functions/blob/master/acf-post-category-ancestor-location-rule.php with 1 line difference
This difference is marked, look for
// this line added to include this term
// **********************************************************************************
$ancestors[] = $term_to_check->term_id;
// **********************************************************************************
You may want to change other things, like the value of the location rule, maybe the function names.
I have not tested this, but if my example is still working then this change should make it include any category and any children of that category
<?php
// category ancestor location rule
add_filter('acf/location/rule_types', 'acf_location_types_category_ancestor');
function acf_location_types_category_ancestor($choices) {
if (!isset($choices['Post']['post_category_ancestor'])) {
$choices['Post']['post_category_ancestor'] = 'Post Category Ancestor';
}
return $choices;
}
add_filter('acf/location/rule_values/post_category_ancestor', 'acf_location_rule_values_category_ancestor');
function acf_location_rule_values_category_ancestor($choices) {
// copied from acf rules values for post_category
$terms = acf_get_taxonomy_terms('category');
if (!empty($terms)) {
$choices = array_pop($terms);
}
return $choices;
}
add_filter('acf/location/rule_match/post_category_ancestor', 'acf_location_rule_match_category_ancestor', 10, 3);
function acf_location_rule_match_category_ancestor($match, $rule, $options) {
// most of this copied directly from acf post category rule
$terms = 0;
if (array_key_exists('post_taxonomy', $options)){
$terms = $options['post_taxonomy'];
}
$data = acf_decode_taxonomy_term($rule['value']);
$term = get_term_by('slug', $data['term'], $data['taxonomy']);
if (!$term && is_numeric($data['term'])) {
$term = get_term_by('id', $data['term'], $data['taxonomy']);
}
// this is where it's different than ACf
// get terms so we can look at the parents
if (is_array($terms)) {
foreach ($terms as $index => $term_id) {
$terms[$index] = get_term_by('id', intval($term_id), $term->taxonomy);
}
}
if (!is_array($terms) && $options['post_id']) {
$terms = wp_get_post_terms(intval($options['post_id']), $term->taxonomy);
}
if (!is_array($terms)) {
$terms = array($terms);
}
$terms = array_filter($terms);
$match = false;
// collect a list of ancestors
$ancestors = array();
if (count($terms)) {
foreach ($terms as $term_to_check) {
// this line added to include this term
// **********************************************************************************
$ancestors[] = $term_to_check->term_id;
// **********************************************************************************
$ancestors = array_merge(get_ancestors($term_to_check->term_id, $term->taxonomy));
} // end foreach terms
} // end if
// see if the rule matches any term ancetor
if ($term && in_array($term->term_id, $ancestors)) {
$match = true;
}
if ($rule['operator'] == '!=') {
// reverse the result
$match = !$match;
}
return $match;
}
?>
