为什么 WordPress 显示来自空 post__in 数组的查询结果? [英] Why is WordPress showing query results from an empty post__in array?

问题描述

我有以下 WP_Query 参数:

$posts = new WP_Query(array(
        'post__in' => $postids,
        'meta_key' =>'ratings_average',
        'orderby'=>'meta_value_num',
        'order' =>'DESC',
    ));

$postids 是从另一个 WP_Query 检索的 id 数组.我的问题是，即使 $postids 为空，Wordpress 循环也会显示帖子.如果 $postids 为空，我该如何管理它不应该显示任何帖子.

$postids is an array of ids which is retrieved from another WP_Query. My problem here is that even if $postids is empty, Wordpress loop shows posts. How can I manage this that it shouldn't show any post if $postids is empty.

推荐答案

这并不能直接解决 post__in 的问题，但我不明白为什么这不起作用..

This isn't directly fixing the issue with post__in but I don't see why this wouldn't work..

if(!empty($postids)){
    $posts = new WP_Query(array(
        'post__in' => $postids,
        'meta_key' =>'ratings_average',
        'orderby'=>'meta_value_num',
        'order' =>'DESC',
    ));
} else {
    //Do something else or nothing at all..
}

如您所见，WP_Query 调用只会在 $postids 中包含 value/s 时发生.如果没有，则不会调用 WP_Query 并且循环将永远不会发生，就像您的查询返回 0 个帖子一样.

as you can see the WP_Query call will only happen if $postids has value/s in it. if it doesn't, then no call is made to WP_Query and the loop will just never happen, same as if your query returned 0 posts.

这篇关于为什么 WordPress 显示来自空 post__in 数组的查询结果?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！