我创建了一个函数，用此代码过滤分类查询

add_action(\'pre_get_posts\', \'custom_taxonomy_query\');

$option_taxposts_per_page = get_option(\'tax_posts_per_page\');

function custom_taxonomy_query(&$query)
{
   global $option_taxposts_per_page;

    if (!is_admin() && 
        is_tax(\'feature\') || is_tax(\'propertytype\') || is_tax(\'location\'))  {

            if (is_tax(\'feature\')) {
            $browseorder = get_option(\'browse_feature_order\');
            }
            else if (is_tax(\'propertytype\')) {
            $browseorder = get_option(\'browse_propertytype_order\');
            }
            else if (is_tax(\'location\')) {
            $browseorder = get_option(\'browse_location_order\');
            }

            switch ($browseorder) {
                case "Price Descending":
                    $metakey = \'_price\';
                    $order = \'DESC\';
                    $orderby = \'meta_value_num\';
                    break;
                case "Price Ascending":
                    $metakey = \'_price\';
                    $order = \'ASC\';
                    $orderby = \'meta_value_num\';
                    break;
                case "Date Descending":
                    $metakey = \'\';
                    $order = \'DESC\';
                    $orderby = \'date\';
                    break;
                case "Date Ascending":
                    $metakey = \'\';
                    $order = \'ASC\';
                    $orderby = \'date\';
                    break;
                case "Random":
                    $metakey = \'\';
                    $order = \'\';
                    $orderby = \'rand\';
                    break;
            }

            $query->set(\'meta_key\', $metakey);
            $query->set(\'post_status\', \'publish\');
            $query->set(\'orderby\', $orderby);
            $query->set(\'order\', $order);
            $query->set(\'posts_per_page\', $option_taxposts_per_page);

    }
}

问题是如果我选择降价和升价的顺序。。我的自定义菜单导航消失了，我不知道这是什么原因。如果我选择按日期随机订购，一切都很好。请帮我解决这个问题。

function taxonomy_posts_order($query) {
    global $browsetype;

    $term = get_term_by( \'slug\', get_query_var( \'term\' ), get_query_var( \'taxonomy\' ) );

    if ( $query->query_vars[\'taxonomy\'] == $term->slug ) 
    {

            switch ($browsetype) {
                case "Price Descending":
                    $metakey = \'_price\';
                    $order = \'DESC\';
                    $orderby = \'meta_value_num\';
                    break;
                case "Price Ascending":
                    $metakey = \'_price\';
                    $order = \'ASC\';
                    $orderby = \'meta_value_num\';
                    break;
                case "Date Descending":
                    $metakey = \'\';
                    $order = \'DESC\';
                    $orderby = \'date\';
                    break;
                case "Date Ascending":
                    $metakey = \'\';
                    $order = \'ASC\';
                    $orderby = \'date\';
                    break;
                case "Random":
                    $metakey = \'\';
                    $order = \'\';
                    $orderby = \'rand\';
                    break;
            }
        $query->query_vars[\'meta_key\'] = $metakey;
        $query->query_vars[\'orderby\'] = $orderby;
        $query->query_vars[\'order\'] = $order;
    }
    return $query;
}
if ( !is_admin() ) add_filter( \'pre_get_posts\', \'taxonomy_posts_order\' );