如何组合tax_query和meta_query的结果?
例如: tax_query结果为: Post1,Post2。
和meta_query重新开始: Post3。
我想结合2个查询的结果。 这是我的部分代码:
'tax_query' => array(
'relation' => 'AND',
array(
'taxonomy' => 'tax1',
'field' => 'term_id',
'terms' => array(1,2,3),
),
array(
'taxonomy' => 'tax2',
'field' => 'term_id',
'terms' => array(1,2,3),
),
),
'meta_query' => array(
array(
'key' => 'meta1',
'value' => '1',
'compare' => '=',
),
),
这里问了同样的问题,但没有回答。所以我重新打开它。 谢谢!
答案 0 :(得分:2)
听起来你想让它像一个' OR'其中返回与tax_query
或meta_query
匹配的帖子。
不幸的是,使用WP_Query无法做到这一点。
你需要写一个custom database call,或者只是单独查询它们并对你的PHP结束进行检查(如果你知道你有一个相对的,那就没问题了。少数结果,但要注意,这不一定会扩展到一个巨大的网站。)
答案 1 :(得分:1)
实现这样的查询的唯一方法是使用$wpdb
全局和SQL语句为db创建自定义查询。我认为会是这样的:
global $wpdb;
$querystr =
"
SELECT * FROM $wpdb->posts
LEFT JOIN $wpdb->postmeta ON ($wpdb->posts.ID = $wpdb->postmeta.post_id)
LEFT JOIN $wpdb->term_relationships ON($wpdb->posts.ID = $wpdb->term_relationships.object_id)
LEFT JOIN $wpdb->term_taxonomy as term_taxonomy1 ON($wpdb->term_relationships.term_taxonomy_id = term_taxonomy1.term_taxonomy_id)
LEFT JOIN $wpdb->term_taxonomy as term_taxonomy2 ON($wpdb->term_relationships.term_taxonomy_id = term_taxonomy2.term_taxonomy_id)
LEFT JOIN $wpdb->terms as tax1_term1 ON(term_taxonomy1.term_id = tax1_term1.term_id)
LEFT JOIN $wpdb->terms as tax1_term2 ON(term_taxonomy1.term_id = tax1_term2.term_id)
LEFT JOIN $wpdb->terms as tax1_term3 ON(term_taxonomy1.term_id = tax1_term3.term_id)
LEFT JOIN $wpdb->terms as tax2_term1 ON(term_taxonomy2.term_id = tax2_term1.term_id)
LEFT JOIN $wpdb->terms as tax2_term2 ON(term_taxonomy2.term_id = tax2_term2.term_id)
LEFT JOIN $wpdb->terms as tax2_term3 ON(term_taxonomy2.term_id = tax2_term3.term_id)
WHERE
(
(
(term_taxonomy1.taxonomy = 'tax1')
AND
(tax1_term1.term_id = 1 AND tax1_term2.term_id = 2 AND tax1_term3.term_id = 3)
)
OR
(
(term_taxonomy2.taxonomy = 'tax2')
AND
(tax2_term1.term_id = 1 AND tax2_term2.term_id = 2 AND tax2_term3.term_id = 3)
)
)
OR
(
$wpdb->postmeta.meta_key = 'meta1' AND $wpdb->postmeta.meta_value = '1'
)
ORDER BY $wpdb->postmeta.meta_value ASC
"
$pageposts = $wpdb->get_results($querystr, OBJECT);
然后,您可以使用$pageposts
循环迭代WP_Query
。