jebu1104
9/15/2017 - 4:35 PM

Fix WP Appearance Menus Pages area from not showing all Parent/Child heirarchy. https://core.trac.wordpress.org/ticket/18282#comment:25 Cr

Fix WP Appearance Menus Pages area from not showing all Parent/Child heirarchy. https://core.trac.wordpress.org/ticket/18282#comment:25

Create a folder for this file to be placed in MU plugin folder and place the file information below as a php file as referenced in the link above.

WP Menu Broken Heirarchy
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/*
Plugin Name: Preserve Page and Taxonomy Hierarchy on Edit Menus Screen
Version: 0.1
// ugin URI: https://core.trac.wordpress.org/ticket/18282
Description: Disables paging for hierarchical post types and taxonomies on Edit Menus screen to preserve proper hierarchy in meta boxes.
Author: Sergey Biryukov
// thor URI: http://profiles.wordpress.org/sergeybiryukov/
*/

class Preserve_Page_and_Taxonomy_Hierarchy
{

    function __construct()
    {
        add_action('load-nav-menus.php', array( $this, 'init' ));
    }

    function init()
    {
        add_action('pre_get_posts', array( $this, 'disable_paging_for_hierarchical_post_types' ));
        add_filter('get_terms_args', array( $this, 'remove_limit_for_hierarchical_taxonomies' ), 10, 2);
        add_filter('get_terms_fields', array( $this, 'remove_page_links_for_hierarchical_taxonomies' ), 10, 3);
    }

    function disable_paging_for_hierarchical_post_types($query)
    {
        if (! is_admin() || 'nav-menus' !== get_current_screen()->id) {
            return;
        }

        if (! is_post_type_hierarchical($query->get('post_type'))) {
            return;
        }

        if (50 == $query->get('posts_per_page')) {
            $query->set('nopaging', true);
        }
    }

    function remove_limit_for_hierarchical_taxonomies($args, $taxonomies)
    {
        if (! is_admin() || 'nav-menus' !== get_current_screen()->id) {
            return $args;
        }

        if (! is_taxonomy_hierarchical(reset($taxonomies))) {
            return $args;
        }

        if (50 == $args['number']) {
            $args['number'] = '';
        }

        return $args;
    }

    function remove_page_links_for_hierarchical_taxonomies($selects, $args, $taxonomies)
    {
        if (! is_admin() || 'nav-menus' !== get_current_screen()->id) {
            return $selects;
        }

        if (! is_taxonomy_hierarchical(reset($taxonomies))) {
            return $selects;
        }

        if ('count' === $args['fields']) {
            $selects = array( '1' );
        }

        return $selects;
    }
}

new Preserve_Page_and_Taxonomy_Hierarchy;