我正在使用一个标签插件。有没有WordPress方法可以获取\\u帖子或查询所有没有标签的帖子？
EDIT
在提问时，我已经向WP Codex、search Stackexchange和Google查询了一个相关问题。我发现了一些有助于查找标记的结果，但不是NOT IN a中的运算符tax_query. 我还没有任何代码可以共享，因为我没有构建查询所需的信息$args.
Get all posts without tags
3 个回复
最合适的回答,由SO网友:gmazzap 整理而成
A.WP_Query 哪里\'tax_query\' 具有所有标记项和运算符“NOT IN”：
$tags = get_terms(\'post_tag\', array(\'fields\'=>\'ids\') );
$args = array(
\'post_type\' => \'post\',
\'posts_per_page\' => -1,
\'tax_query\' => array(
array(
\'taxonomy\' => \'post_tag\',
\'field\' => \'id\',
\'terms\' => $tags,
\'operator\' => \'NOT IN\'
)
)
);
$untagged = new WP_Query( $args );
SO网友:meloniq
这并不能完全回答这个问题，但在处理更大的数据库时，这可能是一个更好的解决方案
// Get all posts IDs - Query took 0.0030 seconds
$all_posts_ids_query = $wpdb->prepare( "SELECT $wpdb->posts.ID FROM $wpdb->posts WHERE $wpdb->posts.post_type = \'%s\' GROUP BY $wpdb->posts.ID", \'your-post-type\' );
$all_posts_ids = $wpdb->get_col( $all_posts_ids_query );
// Get all posts IDs that has tags - Query took 0.0300 seconds
$all_posts_ids_with_tags_query = $wpdb->prepare( "SELECT $wpdb->posts.ID FROM $wpdb->posts
INNER JOIN $wpdb->term_relationships ON ($wpdb->posts.ID = $wpdb->term_relationships.object_id)
INNER JOIN $wpdb->term_taxonomy ON ($wpdb->term_relationships.term_taxonomy_id = $wpdb->term_taxonomy.term_taxonomy_id)
WHERE 1=1 AND ( $wpdb->term_taxonomy.taxonomy = \'%s\' )
AND $wpdb->posts.post_type = \'%s\' GROUP BY $wpdb->posts.ID", \'your-taxonomy-name\', \'your-post-type\' );
$all_posts_ids_with_tags = $wpdb->get_col( $all_posts_ids_with_tags_query );
// Diff IDs arrays to get posts without tags
$all_posts_ids_without_tags = array_diff( $all_posts_ids, $all_posts_ids_with_tags );
SO网友:A\'dii Sunlay
<?php
$args = array(
\'post_type\' => \'post\',
\'posts_per_page\' => -1,
\'tax_query\' => array(
array(
\'taxonomy\' => \'post_tag\',
\'field\' => \'id\',
\'terms\' => \'null\',
\'operator\' => \'NOT IN\'
)));
$untagged = new WP_Query( $args );?>
结束