如果将fields参数指定为“ids”，则我的WP\\U查询工作正常（但我需要所有文件）。

    $query3 = new WP_Query(array(\'post_type\' => array(\'post\'),
    \'posts_per_page\' => -1,
    \'fields\'         => \'ids\',
    \'date_query\' => array(
        array(
            \'column\' => \'post_modified_gmt\',
            \'after\'  => \'1 month ago\'
            )
        )
));

  [request] => SELECT   x_posts.ID FROM x_posts  WHERE 1=1  AND ( 
   x_posts.post_modified_gmt > \'2017-08-27 12:02:06\'
 ) AND x_posts.post_type = \'post\' AND (x_posts.post_status = \'publish\')  
 ORDER BY x_posts.post_date DESC 
[post_count] => 14
[found_posts] => 14
[max_num_pages] => 0
[max_num_comment_pages] => 0

如果我不使用fields参数。我明白了。

    [post_count] => 215
    [found_posts] => 14

但SQL查询是正确的。

[request] => SELECT   x_posts.* FROM x_posts  WHERE 1=1  AND ( 
   x_posts.post_modified_gmt > \'2017-08-27 12:02:06\'
 ) AND x_posts.post_type = \'post\' AND (x_posts.post_status = \'publish\')  
 ORDER BY x_posts.post_date DESC 

我怎样才能修复它？

 \'fields\'         => \'ids\',

 foreach($query3->posts as $id) {
                $post = get_post($id);
 // ...