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Rules for sub Category

  • I want to make rules for main category and it will effect all sub category also.
    ex.
    Gallery
    Sub gallery 1
    Sub gallery 2
    Sub gallery 3

    so if put rules for gallery then it will effect on all sub gallery also. how can do it ?

  • 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;
}
  
?>

  • should i need to open acf-post-category-ancestor-location-rule.php file and replace your code ?

  • The above is a custom location rule based on the documentation https://www.advancedcustomfields.com/resources/custom-location-rules/ and is not part of ACF.

  • where should i paste this code ? inside function.php (theme) or else ?

  • It would usually go in your functions.php file. I like to keep it in a separate file and include that file in my functions php file just because of the amount of code and to make it easy to find. I have also been know to build custom location rules into a plugin when the situation warrants.

  • Hey,
    I used te code, it works but it adds the ACF fields only after I publish the page. Is there a way to make them show when I check the category?

  • Hi, @hube2.

    I’ve used the above code on my website. It’s still accurate in 2022 and it works. It saved me a few hours of work trying to figure it out myself.

    Thank you very much.
    Kind regards

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