php - Wordpress/SQL 中 Orderby 默认为 DESC

Question

我在循环中使用 foreach 和 setup_postdata 来显示帖子。 $args 按“post_in”排序，但输出以 SQL 中帖子 ID 的默认 DESC 顺序显示。

这是输出:

在参数之前

Array ( [0] => 229 [1] => 226 [2] => 228 [3] => 227 [4] => 225 )

参数之后

Array ( 
  [post_type] => movies
  [post_in] => Array ( 
    [0] => 229 
    [1] => 226 
    [2] => 228 
    [3] => 227 
    [4] => 225 
  ) 
  [orderby] => post_in 
)

查询转储

string(275) "
SELECT SQL_CALC_FOUND_ROWS wpxc_posts.ID 
  FROM wpxc_posts 
 WHERE 1=1 
   AND wpxc_posts.post_type = 'movies' 
   AND (wpxc_posts.post_status = 'publish' 
 OR wpxc_posts.post_status = 'acf-disabled' 
 OR wpxc_posts.post_status = 'private') 
 ORDER 
    BY wpxc_posts.post_date DESC 
 LIMIT 0, 10"

实际序列

229  
228
227
226
225

代码如下:

<?php
$postidsstring = get_field('post_ids_to_be_included');
$postidsarray = explode(", ",$postidsstring);
echo "Before args <br>";
print_r($postidsarray);
$args = array(
    'post_type'=> 'movies',
    'post_in' => $postidsarray,
    'orderby' => 'post_in'
);
$myposts = get_posts($args);
?><br><?php
echo "After args <br>";
print_r($args);
echo "<br>Query dump<br>";
$query = new WP_Query($args);
var_dump($query->request);
echo "<br> Actual Sequence";
foreach ( $myposts as $post ) : 
global $post;
setup_postdata( $post ); ?>
<li>
<?php echo get_the_ID(); ?>
</li>   
<?php endforeach;
?>

请建议如何控制这种情况下的排序。

Answer 1

您可以在发布的查询中看到它不是按 ID 排序(甚至不是按 ID 进行过滤)，而是按 post_date 排序:

ORDER BY wpxc_posts.post_date DESC

我认为问题是双下划线 - note that post_in is not in the spec, whereas post__in is. 。尝试使用这个:

$args = array(
  'post_type'=> 'movies',
  'post__in' => $postidsarray,
  'orderby' => 'post__in'
);