我正在使用rest_{post_type}_query 对于某些自定义查询参数。它工作得很好，但是，当查询没有要匹配的帖子ID时，我希望得到一个空响应或一条“找不到帖子”消息。目前它得到了所有的帖子。
function query_video_by_politician($args, $request) {
if(isset($request["politician_id"]) && intval($request["politician_id"])) {
$mp_entry_ids = FrmEntryMeta::getEntryIds( array(
\'fi.form_id\' => 41,
\'meta_value\' => intval($request["politician_id"]),
\'field_id\' => 517
) );
$mla_entry_ids = FrmEntryMeta::getEntryIds( array(
\'fi.form_id\' => 41,
\'meta_value\' => intval($request["politician_id"]),
\'field_id\' => 518
) );
if ( !empty($mp_entry_ids) ) {
$entry_ids = $mp_entry_ids;
}
if ( !empty($mla_entry_ids) ) {
$entry_ids = $mla_entry_ids;
}
if ( !empty($entry_ids) ) {
$where = array(
\'form_id\' => 41,
\'id\' => $entry_ids
);
$post_ids = FrmDb::get_results( \'frm_items\', $where, \'id, post_id\' );
if ( $post_ids ) {
foreach( $post_ids as $post ) {
if( !in_array( $post->post_id, $post_ids ) )
$ids[] = $post->post_id;
}
$args[\'post__in\'] = $ids;
}
}
}
return $args;
}
add_filter(\'rest_gallery_query\', \'query_video_by_politician\', 10, 2);
最合适的回答,由SO网友:shubhra 整理而成
我在中找到了答案WP_REST_Posts_Controller class
/*
* If we intersected, but there are no post ids in common,
* WP_Query won\'t return "no posts" for post__in = array()
* so we have to fake it a bit.
*/
if ( ! $args[\'post__in\'] ) {
$args[\'post__in\'] = array( 0 );
}
