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Rules for sub Category

  • I want to make rules for main category and it will effect all sub category also.
    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 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

    // 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 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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