Reply To: Assigning Custom Fields To Child/Parents?

• John Huebner

• July 16, 2014 at 9:19 pm

There is a document here about adding custom location rules: http://www.advancedcustomfields.com/resources/tutorials/custom-location-rules/

I don’t have an example of adding a custom location rule for a post parent/child rule, but I do have an example of adding a taxonomy parent/child rule.

This is all built into a class for a custom theme I built for a client, hopefully it helps you get an idea what you need to do.

private function __construct() {
  add_filter('acf/location/rule_types', array($this, 'acf_location_rules_types'));
  add_filter('acf/location/rule_operators', array($this, 'acf_location_rules_operators'));
  add_filter('acf/location/rule_values/taxonomy_depth', array($this, 'acf_location_rules_values_taxonomy_depth'));
  add_filter('acf/location/rule_match/taxonomy_depth', array($this, 'acf_location_rules_match_taxonomy_depth'), 10, 3);
}
    
public function acf_location_rules_types($choices) {
  $choices['Other']['taxonomy_depth'] = 'Taxonomy Depth';
  return $choices;
}

public function acf_location_rules_operators($choices) {
  //BY DEFAULT WE HAVE == AND !=
  $choices['<'] = 'is less than';
  $choices['>'] = 'is greater than';
  return $choices;
}

public function acf_location_rules_values_taxonomy_depth($choices) {
  for ($i=0; $i<6; $i++) {
   $choices[$i] = $i;
  }
  return $choices;
}

public function acf_location_rules_match_taxonomy_depth($match, $rule, $options) {
  $depth = intval($rule['value']);
  if (isset($_GET['taxonomy']) && isset($_GET['tag_ID'])) {
    $term_depth = count(get_ancestors($_GET['tag_ID'], $_GET['taxonomy']));
  }
  if($rule['operator'] == '==') {
    $match = ($depth == $term_depth);
  } elseif($rule['operator'] == '!=') {
    $match = ($depth == $term_depth);
  } elseif($rule['operator'] == '<') {
    $match = ($term_depth < $depth);
  } elseif($rule['operator'] == '>') {
    $match = ($term_depth > $depth);
  }
  return $match;
}