正如TimMalone所说，WP\\U查询不会在其结果集中返回同一帖子的多个副本。我认为你有一个设计问题，我建议你使用父/子帖子而不是帖子元来完成你想要的。

以下是实现这一点的一种方法。首先，注册两种帖子类型：

// The parent event type
// There will be one of these for Radio Show and TV Show
register_post_type( \'event\', $args );

// A non-public event type for each "occurrence" of an event
// There will be two of these for each Radio Show and TV Show
register_post_type( \'event_occurrence\', array(
    // add all of your usual $args and then set public to false
    \'public\' => false,
) );

然后，在保存event post，不要将开始/结束时间保存为该post对象上的post meta。而是使用这些日期创建event_occurrence 每次事件的帖子，其中保存了开始和结束时间。

$occurrence_id = wp_insert_post( array(
    // add all of your occurrence details and then set the parent
    // to the `event` post that\'s being saved
    \'post_parent\' => <event_post_id>,

    // Set the post date to the start time for efficient ordering
    \'post_date\' => $start_time,
) );

// Save the end time as post meta
// Save it as a Unix timestamp so that we can compare it in the query
update_post_meta( $occurrence_id, \'end_time\', strtotime( $end_time ) );

现在，数据库中应该有以下帖子：

Radio Show
    Radio Show Instance 1
    Radio Show Instance 2
TV Show
    TV Show Instance 1
    TV Show Instance 2

然后，可以按如下方式查询事件：

$args = array(

    // Only fetch occurrences
    \'post_type\' => \'event_occurrence\',

    // Retrieve only future occurrences
    \'date_query\' => array(
        array(
            \'after\' => \'now\',
        )
    ),

    // use a reasonably high posts_per_page instead of -1
    // otherwise you could accidentally cripple a site
    // with an expensive query
    \'posts_per_page\' => 500,

    \'post_status\' => \'publish\',

    \'meta_query\' => array(
        array(
            \'key\' => \'end_time\',
            \'value\' => time(),
            \'compare\' => \'>=\'
        ),
    ),

    // They\'ll be ordered by start date.
    // ASC starts with earliest first
    \'order\' => \'ASC\',
);

我们的循环现在将包含四个帖子：

Radio Show Instance 1
Radio Show Instance 2
TV Show Instance 1
TV Show Instance 2

因此，当您在事件中循环时，可以访问每个事件的父帖子，以获取总体事件数据。您可以通过一个简单的函数来实现这一点：

$parent_event_id = wp_get_post_parent_id( get_the_ID() );

然而，这将导致对数据库的大量额外查询，从而影响性能。相反，我建议您对主event 发布，然后从这些结果中提取它们，因此您只需对数据库进行一个额外的查询：

$args = array(
    \'post_type\' => \'event\',
    \'date_query\' => array(
        array(
            \'after\' => \'now\',
        )
    ),
    \'posts_per_page\' => 500,
    \'post_status\' => \'publish\',
    \'meta_query\' => array(
        array(
            \'key\' => \'end_time\',
            \'value\' => time(),
            \'compare\' => \'>=\'
        ),
    ),
    \'order\' => \'ASC\',
);
$events = new WP_Query( $args );

因此，您的$引用循环如下所示：

$occurrences = new WP_Query( $occurrences_args );
while( $occurrences->have_posts() ) {
    $occurrences->the_post();

    // Get the parent event data
    $parent_event_id = wp_get_post_parent_id( get_the_ID() );
    $parent_event = null;
    foreach ( $events->posts as $post ) {
        if ( $post->ID == $parent_event_id ) {
            $parent_event = $post;
            break;
        }
    }

    // Now you can use the loop to access the
    // occurrence data and use $parent_event to
    // access the overall event data
}

用这个怎么样？

$args = array(
    \'post_type\' => \'post\',
    \'posts_per_page\' => -1,
    \'post_status\' => \'publish\',
    \'meta_query\' => array(
        \'relation\' => \'OR\',
        array(
            \'key\' => $end_time_1,
            \'value\' => date(\'Y-m-d H:i\'),
            \'compare\' => \'>=\'
        ),
        array(
            \'key\' => $end_time_2,
            \'value\' => date(\'Y-m-d H:i\'),
            \'compare\' => \'>=\'
        )
    ),
    \'meta_key\' => $start_time_1,
    \'orderby\'  => array( 
        \'meta_value\' => \'ASC\', 
        \'post_date\' => \'ASC\',
    ),
    \'order\' => \'ASC\',
);

我认为可以使用嵌套关系进行更全面的查询。