ACF自定义位置规则来选择祖父母页

Question

我想建立一个自定义位置规则能够选择祖父母页，但没有成功......这是我的目标：

显示此字段组如果：

页大单亲--------等于---------页X

有人吗？ 谢谢！

约翰

ACF Documentation关于这个问题有点差...

Answer 1

下面是答案...

论文线只需复制到你的functions.php ...

感谢名单约翰Huebner谁在ACF论坛上友好...

add_filter('acf/location/rule_types', 'acf_location_rules_page_grandparent'); 
function acf_location_rules_page_grandparent($choices) { 
    $choices['Page']['page_grandparent'] = 'Page Grandparent'; 
    return $choices; 
} 

add_filter('acf/location/rule_values/page_grandparent','acf_location_rules_values_page_grandparent'); 
function acf_location_rules_values_page_grandparent($choices) { 
    // this code is copied directly from 
    // render_location_values() 
    // case "page" 
    $groups = acf_get_grouped_posts(array(
    'post_type' => 'page' 
)); 
    if (!empty($groups)) { 
    foreach(array_keys($groups) as $group_title) { 
     $posts = acf_extract_var($groups, $group_title); 
     foreach(array_keys($posts) as $post_id) { 
     $posts[$post_id] = acf_get_post_title($posts[$post_id]); 
     }; 
     $choices = $posts; 
    } 
    } 
    // end of copy from ACF 
    return $choices; 
} 

add_filter('acf/location/rule_match/page_grandparent', 'acf_location_rules_match_page_grandparent', 10, 3); 
function acf_location_rules_match_page_grandparent($match, $rule, $options) { 
    // this code is with inspiration from 
    // acf_location::rule_match_page_parent() 
    // with addition of adding grandparent check 
    if(!$options['post_id']) { 
    return false; 
    } 
    $post_grandparent = 0; 
    $post = get_post($options['post_id']); 
    if ($post->post_parent) { 
    $parent = get_post($post->post_parent); 
    if ($parent->post_parent) { 
     $post_grandparent = $parent->post_parent; 
    } 
    } 
    if (isset($options['page_parent']) && $options['page_parent']) { 
    $parent = get_post($options['page_parent']); 
    if ($parent->post_parent) { 
     $post_grandparent = $parent->post_parent; 
    } 
    } 
    if (!$post_grandparent) { 
    return false; 
    } 
    if ($rule['operator'] == "==") { 
    $match = ($post_grandparent == $rule['value']); 
    } elseif ($rule['operator'] == "!=") { 
    $match = ($post_grandparent != $rule['value']); 
    } 
    return $match; 
}