如何对多个wordpress自定义字段值进行排序？

Question

显示按"价格"自定义字段排序的"产品"类型的帖子:

$query = new WP_Query( 
                      array ( 'post_type' => 'product', 
                              'orderby' => 'meta_value', 
                              'meta_key' => 'price' ) 
                     );

如果还想按"尺寸"排序,我应该使用哪个代码？

我需要在自定义字段上进行多种排序的另一个示例:

显示"事件"类型的帖子,按"Start_Hour"排序,然后按"Start_Minute"排序.

Answer 1

感谢Bainternet,我找到了解决方案:

function orderbyreplace($orderby) {
    return str_replace('menu_order', 'mt1.meta_value, mt2.meta_value', $orderby);
}

和...

$args = array(
  'post_type'=>'Events',
  'orderby' => 'menu_order',
  'order' => 'ASC',
  'meta_query' => array(
        array(
            'key' => 'Start_Hour',
            'value' => '',
            'compare' => 'LIKE'
        ),
        array(
            'key' => 'Start_Minute',
            'value' => '',
            'compare' => 'LIKE'
        )
    )
);

add_filter('posts_orderby','orderbyreplace');
$loop = new WP_Query( $args );
remove_filter('posts_orderby','orderbyreplace');