我尝试制作自定义查询以从wordpress获取帖子(他们真的是产品),其中没有名为' custom_code&#39的元查询; 即可。 我正在尝试:
SELECT DISTINCT p.ID
FROM
wp_posts p
LEFT JOIN wp_postmeta pm ON p.ID = pm.post_id
WHERE
p.post_type = 'product'
AND ( p.post_status = 'publish' OR p.post_status = 'draft' )
AND pm.meta_key = 'custom_code' AND pm.meta_key IS NULL
我尝试使用NOT EXISTS,但是sql返回错误:
SELECT DISTINCT p.ID
FROM
wp_posts p
LEFT JOIN wp_postmeta pm ON p.ID = pm.post_id
WHERE
p.post_type = 'product'
AND ( p.post_status = 'publish' OR p.post_status = 'draft' )
AND NOT EXISTS (
select * from wp_postmeta as pm2
where pm2.meta_key = 'custom_code'
)
注意:我需要获得具有状态'发布'作为状态为' draft'。
的帖子错误返回:
无法识别的关键字。 (靠近" NOT",位置193)
无法识别的关键字。 (近#34; EXISTS",位置197)
符号(令牌)意外。 (靠近"("在204位)
当前要点
我使用了WordPress API,但它确实有效,但我需要添加一个LEFT JOIN来获取名称类似于下面句子返回的每个产品名称的产品。这是一句话:
$args = array(
'posts_per_page' => -1,
'post_type' =>'product',
'post_status' => 'publish,draft',
'meta_query' => array(
array(
'key' => 'custom_code',
'compare' => 'NOT EXISTS'
)),
);
$posts_array = get_posts( $args );
有任何帮助吗? 提前谢谢。
答案 0 :(得分:1)
这是NOT EXITSTS
的查询可能是:
SELECT DISTINCT p.ID
FROM wp_posts AS p
WHERE p.post_type = 'product' AND
p.post_status ΙΝ ('publish', 'draft' ) AND
NOT EXISTS (select *
from wp_postmeta as pm
where p.ID = pm.post_id AND
pm.meta_key = 'custom_code')
或使用LEFT JOIN
:
SELECT DISTINCT p.ID
FROM wp_posts AS p
LEFT JOIN wp_postmeta AS pm
ON p.ID = pm.post_id AND pm.meta_key = 'custom_code'
WHERE p.post_type = 'product' AND
p.post_status ΙΝ ('publish', 'draft' ) AND
pm.post_id IS NULL
答案 1 :(得分:1)
你有没有试过这样的东西
$args = array(
'posts_per_page' => -1,
'post_type' =>'product',
'post_status' => 'publish,draft',
'meta_query' => array(
array(
'key' => 'custom_code',
'compare' => 'NOT EXISTS'
)),
);
$posts_array = get_posts( $args );
var_dump( $posts_array );
注意强>
使用此代码打印查询
global $wpdb;
var_dump( $wpdb->last_query);