Wordpress:自定义循环以排除在小部件 $args 中分配的帖子 ID [英] Wordpress: Custom loop to exclude post id assigned within widget $args

问题描述

在 function.php 中注册小部件以显示定义的 post_id 元:

Having widget registered in function.php to display defined post_id meta:

class featured_widget extends WP_Widget
{
  /**
     * Display front-end contents.
     */
    function widget($args, $instance)
    {
        $post = get_post($instance['post_id']);
...
}

}

我想从循环中排除分配的 $post 的 post_id:

I want to exclude the assigned post_id of $post from my loop:

if (have_posts()) : while (have_posts()) : the_post();

推荐答案

1.如何获取post_id值?

WordPress 将小部件数据存储在选项表中，option_name 是 widget_{$id_base}.例如，当您构建这样的小部件时:

1. How to get the post_id value?

WordPress stores widget data in the options table with option_name is widget_{$id_base}. Example, when you construct a widget like this:

function __construct() {
    parent::__construct('so37244516-widget',
        __('A label', 'text-domain'), [
        'classname'   => 'so37244516-widget-class',
        'description' => __('Some descriptions', 'text-domain')
    ]);
}

option_name 应该是 widget_so37244516-widget.然后要检索小部件数据，我们只需要使用:

The option_name should be widget_so37244516-widget. Then to retrieve the widget data, we just need to use:

$data = get_option('widget_so37244516-widget');

但是，因为一个小部件可以有多个实例，$data 是一个具有不可预测键的关联数组.(每次我们将小部件拖入侧边栏并保存时，都会返回小部件的一个新实例).

But, because a widget can have multiple instances, $data is an associative array with unpredictable keys. (Each time we drag a widget into a sidebar and save it, a new instance of the widget is returned).

因此，如果整个站点中只有一个小部件实例，$data[2]['post_id'] 就是我们需要的值.如果有多个实例，我们需要遍历$data，比较一些键和值以找出正确的.一如既往，var_dump($data) 非常有帮助.

So if there's only one instance of the widget throughout your site, $data[2]['post_id'] is the value we need. And if there're multiple instances, we need to loop through $data, compare some keys and values to find out the correct one. As always, var_dump($data) is very helpful.

假设 $exclude_id 是我们从第 1 步得到的值.

Suppose $exclude_id is the value we got from step 1.

1. 您正在执行自定义循环，请使用@hemnath_mouli 的方法:

$query = new WP_Query([
    'post__not_in' => [$exclude_id]
]);

if ( $query->have_posts() ) :
    while ( $query->have_posts() ) : $query->the_post();
        // Do loop.
    endwhile;
    wp_reset_query(); // Must have.
else :
    // Do something.
endif;

记得做wp_reset_query().

1. 您正在使用默认循环，请在您的 functions.php 中尝试@Deepti_chipdey 的方法:

1. You're using default loop, try @Deepti_chipdey's method in your functions.php:

add_action('pre_get_posts', function($query)
{
    if ( $query->is_home() && $query->is_main_query() ) {
        $query->set('post__not_in', [$exclude_id]);
    }
});

确保将 is_home() 更改为您的偏好页面.

Make sure to change is_home() to your preference page.

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