在我正在开发的网站上，我添加了标记页面的功能。然后，应在查询中使用这些标记来检索标记的所有关联页面。

在我的函数文件中-

// Add tag support to Pages
function tags_support_all() {
    register_taxonomy_for_object_type(\'post_tag\', \'page\');
}
function tags_support_query($wp_query) {
    if ($wp_query->get(\'tag\')) $wp_query->set(\'post_type\', \'any\');
}
add_action(\'init\', \'tags_support_all\');
add_action(\'pre_get_posts\', \'tags_support_query\');

查询-

$tag = get_query_var(\'tag\');
$articles = new WP_Query( array(
    \'showposts\' => -1,
    \'tag\' => $tag,
    \'meta_key\' => \'date\',
    \'orderby\' => \'meta_value_num\',
    \'order\' => \'DESC\'
    )
);

由于某些原因，它与我的页面与标签不匹配。我可以看到这些标签被添加到管理面板中我的标签集合下，但可能缺少一个设置，使WP只能查找匹配的帖子。

为了回答birgie的问题，我在使用printf时得到了这个结果-

SELECT   wp_posts.* FROM wp_posts  INNER JOIN wp_term_relationships ON (wp_posts.ID = wp_term_relationships.object_id) INNER JOIN wp_postmeta ON (wp_posts.ID = wp_postmeta.post_id) WHERE 1=1  AND ( wp_term_relationships.term_taxonomy_id IN (5) ) AND wp_posts.post_type IN (\'post\', \'page\', \'attachment\') AND (wp_posts.post_status = \'publish\') AND (wp_postmeta.meta_key = \'date\' ) GROUP BY wp_posts.ID ORDER BY wp_postmeta.meta_value+0 DESC 

$articles = new WP_Query( array(
    \'showposts\' => -1,
    \'tag\' => $tag,
    \'meta_key\' => \'date\',
    \'orderby\' => \'meta_value_num\',
    \'order\' => \'DESC\',
    \'post_type\' => array( \'post\', \'page\' )
)