我想展示A、B、C、D类的帖子。。。和Y，除了X，除非X中的帖子也在Y中，然后将它们与其余的一起显示。

我可以很简单地隐藏类别X：

$args = array(
    \'post_type\' => \'post\',
    \'posts_per_page\' => 15,
    \'paged\' => $paged,
    \'cat\' => \'-X\',
);

我试过了combine two loops, 一个获取除X之外的所有帖子，另一个获取X和Y中的帖子，但似乎不起作用：

$EverythingButXLoop_args = array(
    \'post_type\' => \'post\',
    \'cat\' => \'-X\',
);
$EverythingButXLoop = new WP_Query( $EverythingButXLoop_args );

$OnlyXwithYLoop_args = array(
    \'post_type\' => \'post\',
    \'category_name\' => \'categoryX+categoryY\',
);
$OnlyXwithYLoop = new WP_Query( $OnlyXwithYLoop_args );

$mainLoop_args = array(
    \'posts_per_page\' => 15,
    \'paged\' => $paged,
);
$mainLoop = new WP_Query( $mainLoop_args );
$mainLoop->posts = array_merge( $EverythingButXLoop->posts, $OnlyXwithYLoop->posts );

//populate post_count count for the loop to work correctly
$mainLoop->post_count = $EverythingButXLoop->post_count + $OnlyXwithYLoop->post_count;

我还考虑过在一个var中获取所有类别ID（而不是列出我的许多其他类别中的每一个），并将其与类别参数一起使用，以排除X中的帖子。。。不知何故，即。\'cat\' => $categoryIDs, \'category__not_in\' => \'X\' 但我认为我仍然面临着最初的问题：excluding X, except when in X and Y

你知道上面的组合技术有什么不起作用，或者我如何用另一种（更好的）方法来实现这一点吗？提前感谢！

$args = array(
  \'post_type\' => \'post\',
  \'posts_per_page\' => 15,
  \'paged\' => $paged,
  \'category__not_in\' => \'X\', // string
);

$args = array(
  \'post_type\' => \'post\',
  \'posts_per_page\' => 15,
  \'paged\' => $paged,
  \'category__in\' => array(X,Y), // Array
  \'post__not_in\' => array(X),
);

$args = array(
  \'post_type\' => \'post\',
  \'posts_per_page\' => 15,
  \'paged\' => $paged,
  \'category__in\' => array(X,Y), // Array
  \'post__not_in\' => array(X),
);

$your_query = new WP_Query( $args );
  while( $your_query->have_posts() ):
  $your_query->the_post();
  the_title();
endwhile;

wp_reset_postdata();