基于多个搜索，这是我试图按两个不同的元键值排序的代码。

\'meta_query\' => array(
        \'relation\' => \'AND\',
        \'listing_order\' => array(
            \'key\' => \'atsc_bod_listing_order\',
            \'compare\' => \'EXISTS\',
        ),
        \'last_name\' => array(
            \'key\' => \'atsc_bod_last_name\',
            \'compare\' => \'EXISTS\',
        ), 
    ),
    \'orderby\' => array( 
        \'listing_order\' => \'ASC\',
        \'last_name\' => \'ASC\',
),

我想先按数值排序，如果数值相同，则按姓氏排序。此代码不返回任何结果。我认为这与不知道排序字段是“meta\\u value\\u num”还是“meta\\u value”有关，但我不确定如何/在何处添加该信息。

下面是包含以下建议的完整代码。

<?php
        $args = array (
        \'post_type\'         => \'atsc_bod\',
        \'posts_per_page\'    => -1,
        \'post_status\'       => \'publish\',



            \'meta_query\' => array(
                    \'relation\' => \'AND\',
                    \'listing_order\' => array(
                        \'key\' => \'atsc_bod_listing_order\',
                        \'compare\' => \'EXISTS\',
                        \'type\'    => \'NUMERIC\',
                    ),
                    \'last_name\' => array(
                        \'key\' => \'atsc_bod_last_name\',
                        \'compare\' => \'EXISTS\',
                    ), 
                ),
                \'orderby\' => array( 
                    \'listing_order\' => \'ASC\',
                    \'last_name\' => \'ASC\',
            ),



        );
        $loop = new WP_Query($args);
        ?>

\'listing_order\' => array(
    \'key\'     => \'atsc_bod_listing_order\',
    \'compare\' => \'EXISTS\',
    \'type\'    => \'NUMERIC\',
),