Question

我有一些常规的WordPress帖子，我需要通过父类别从数据库中获取，并按照我在数据库中自定义表的结果排序。

我想为（包括儿童）检索帖子的父类别称为资源管理器，其ID为29。

自定义表名为wp_upvotes。在此表中有几列，但我们关注的唯一列可能是id和postID。我想按wp_posts等于postID的行数排序wp_post.ID，如果该表中没有其他帖子的行，那么它们应该是按日期排序。我希望按日期upvotes到upvotes的最小数量{/ 1}}。

我试过的查询就是这个（它只返回第一篇文章，而不是全部文章）：

$catIDs = array(29,30,31,32);

SELECT wp_posts.*, COUNT(wp_upvotes.id) AS upvotes FROM wp_posts
LEFT JOIN wp_upvotes ON (wp_posts.ID = wp_upvotes.postID)
INNER JOIN wp_term_relationships
ON (wp_posts.ID = wp_term_relationships.object_id)
INNER JOIN wp_term_taxonomy
ON (wp_term_relationships.term_taxonomy_id = wp_term_taxonomy.term_taxonomy_id
AND wp_term_taxonomy.taxonomy = 'category'
AND wp_term_taxonomy.term_id IN (" . implode(',', $catIDs) . "))
AND wp_posts.post_status = 'publish'
ORDER BY upvotes DESC, wp_posts.post_date DESC

当我删除wp_upvotes表的LEFT JOIN时，它会返回所有正确的帖子。为什么我在使用LEFT JOIN时只返回一行？

SELECT wp_posts.* FROM wp_posts
INNER JOIN wp_term_relationships
ON (wp_posts.ID = wp_term_relationships.object_id)
INNER JOIN wp_term_taxonomy
ON (wp_term_relationships.term_taxonomy_id = wp_term_taxonomy.term_taxonomy_id
AND wp_term_taxonomy.taxonomy = 'category'
AND wp_term_taxonomy.term_id IN (" . implode(',', $catIDs) . "))
AND wp_posts.post_status = 'publish'
ORDER BY wp_posts.post_date DESC

Answer 1

看起来主要因素是使用ORDER BY wp_posts.ID无论出于何种原因使其显示所有行而不只是一个..奇怪但这是我最后的代码，我想做我上面要做的事情：

SELECT wp_posts.*, COUNT(wp_upvotes.id) AS upvotes FROM wp_posts
INNER JOIN wp_term_relationships
ON (wp_posts.ID = wp_term_relationships.object_id)
INNER JOIN wp_term_taxonomy
ON (wp_term_relationships.term_taxonomy_id = wp_term_taxonomy.term_taxonomy_id
AND wp_term_taxonomy.taxonomy = 'category'
AND wp_term_taxonomy.parent = 29)
LEFT JOIN wp_upvotes ON (wp_posts.ID = wp_upvotes.postID)
WHERE wp_posts.post_status = 'publish'
GROUP BY wp_posts.ID
ORDER BY upvotes DESC, wp_posts.post_date DESC

WordPress Query根据自定义表获取帖子

1 个答案: