I have a custom article taxonomy defined as follows:

// 为文章注册自定义分类法 function custom_taxonomy_page_type_for_posts() { $labels = array( 'name' => _x( '页面类型', '分类法通用名称' ), 'singular_name' => _x( '页面类型', '分类法单数名称' ), ... $args = array( 'hierarchical' => false, ... 'rewrite' => array( 'slug' => 'page-type' ), 'show_in_rest' => true, ); register_taxonomy( 'page_type', 'post', $args ); }

In the following code, I want to add a body class based on whether the current article is assigned as a "newsletter" page type.

/* 这将在body标签上添加“vn-briefing”或“vn-not-briefing”类。 */ function add_page_type_css_class($classes) { if (is_singular('post')) { // 检查文章是否被分配了ID为187的“页面类型”分类法 if (has_term('Briefing', 'Page Types')) { $classes[] = 'is-briefing'; } else { $classes[] = 'is-not-briefing'; } } return $classes; } add_filter('body_class', 'add_page_type_css_class');

Even if the article is assigned the "Page Type" with ID=187 as "Newsletter", it always returns false.

I expected the function to return true if the post was assigned the "Newsletter" page type, but it doesn't.

I also tried:

has_term('Briefing', 'Page Type') has_term('Briefing', 'page-type')

How should I do this?