我创建了一个父代>子代>孙子结构。 （课程>系列>剧集）。
我创建了以下代码，用于更新每种自定义帖子类型的URL，以便可以使用URL结构
http://mywebsite.co.uk/system/%course%/%series%/%episode%。
例如，一门名为“速成课程”的课程，其中包含一系列“基础知识”，并带有一集“检查镜子”，看起来像这样
http://mywebsite.co.uk/system/crash-course/the-basics/checking-your-mirrors
一切正常，但我注意到一个非常奇怪的错误。每当我保存一个情节时，固定链接都会更改以尝试匹配随机剧集？
例如，如果我保存一次情节，我的固定链接就是
http://mywebsite.co.uk/system/crash-course/the-basics/checking-your-mirrors。
然后，当我回到情节中时，进行任何更改并尝试再次保存它，一旦我保存并刷新页面，它就会自动更改为
http://mywebsite.co.uk/system/crash-course/the-basics/the-basics-2，我必须单击“编辑”并手动将其更改回。
下面是我的完整自定义帖子类型注册代码，如果有人有任何想法，请告诉我！每当我进行更改时，手动重新更改永久链接是不理想的！
注意-我为以下巨大的代码片段表示歉意，我认为最好粘贴所有自定义帖子类型代码以帮助调试！
<?php
/* ----------------------------------------------------------------------------------------------------------
Register our custom post types
---------------------------------------------------------------------------------------------------------- */
function create_post_type() {
//Courses
register_post_type( 'course',
[
'labels' => array(
'name' => __( 'Courses' ),
'singular_name' => __( 'Course' )
),
'description' => 'All courses',
'public' => true,
'hierarchical' => true,
'rewrite' => array(
'slug' => 'system',
),
'menu_icon' => 'dashicons-welcome-learn-more',
'supports' => ['title', 'custom_fields', 'page-attributes']
]
);
//Series
register_post_type( 'series',
[
'labels' => array(
'name' => __( 'Series' ),
'singular_name' => __( 'Series' )
),
'description' => 'Course Series',
'public' => true,
'hierarchical' => false,
'show_ui' => true,
'show_in_menu' => 'edit.php?post_type=course',
'supports' => ['title', 'custom_fields', 'page-attributes']
]
);
//Episodes
register_post_type( 'episodes',
[
'labels' => array(
'name' => __( 'Episodes' ),
'singular_name' => __( 'Episode' )
),
'description' => 'Series Episodes',
'public' => true,
'hierarchical' => false,
'show_ui' => true,
'show_in_menu' => 'edit.php?post_type=course',
'supports' => ['title', 'custom_fields', 'page-attributes']
]
);
}
add_action( 'init', 'create_post_type' );
/* ----------------------------------------------------------------------------------------------------------
Add our meta boxes to our series and episode add/edit page
---------------------------------------------------------------------------------------------------------- */
function my_add_meta_boxes() {
//Series Meta Boxes
add_meta_box( 'series-parent', 'Course', 'series_attributes_meta_box', 'series', 'side', 'high' );
//Episode Meta Boxes
add_meta_box( 'episode-parent', 'Series', 'episode_attributes_meta_box', 'episodes', 'side', 'high' );
}
add_action( 'add_meta_boxes', 'my_add_meta_boxes' );
function series_attributes_meta_box($post) {
$post_type_object = get_post_type_object($post->post_type);
$pages = wp_dropdown_pages([
'post_type' => 'course',
'selected' => $post->post_parent,
'name' => 'parent_id',
'show_option_none' => __( '(no parent)' ),
'sort_column'=> 'menu_order, post_title',
'echo' => 0
]);
if (!empty($pages)){
echo $pages;
}
}
function episode_attributes_meta_box( $post ) {
$post_type_object = get_post_type_object( $post->post_type );
$select = "<select name='parent_id' id='parent_id'>";
$select .= "<option value=''>(No Parent)</option>";
//Get Series
$args = [
'post_type' => 'series',
'posts_per_page' => -1,
'meta_key' => 'series_number',
'orderby' => 'meta_value_num',
'order' => 'ASC'
];
$seriesQuery = new WP_Query($args);
//Loop the series
while($seriesQuery->have_posts()){
$seriesQuery->the_post();
$select .= "<option " . (get_the_ID() == $post->post_parent ? 'selected' : '') . " class='level-0' value='" . get_the_ID() . "'>" . get_the_title(wp_get_post_parent_id(get_the_ID())) . ' - ' . get_the_title() . "</option>";
}
wp_reset_postdata();
$select .= "</select>";
echo $select;
}
/* ----------------------------------------------------------------------------------------------------------
String replace on the permalinks before we save them
---------------------------------------------------------------------------------------------------------- */
function custom_permalinks($permalink, $post, $leavename) {
$post_id = $post->ID;
$parent = $post->post_parent;
$parent_post = get_post( $parent );
//Series or Episodes
switch($post->post_type){
case 'episodes':
if(empty($permalink) || in_array($post->post_status, array('draft', 'pending', 'auto-draft'))){
return $permalink;
} else {
$grandparent_post = get_post( $parent_post->post_parent );
$search = ['%course%', '%series%'];
$replace = [$grandparent_post->post_name, $parent_post->post_name];
$permalink = str_replace($search, $replace, $permalink);
return $permalink;
}
break;
case 'series':
if(empty($permalink) || in_array($post->post_status, array('draft', 'pending', 'auto-draft'))){
return $permalink;
} else {
$search = ['%course%'];
$replace = [$parent_post->post_name];
$permalink = str_replace($search, $replace, $permalink);
return $permalink;
}
break;
default:
return $permalink;
break;
}
}
add_filter('post_type_link', 'custom_permalinks', 10, 3);
function my_add_rewrite_rules() {
//Episodes
add_permastruct('episodes', '/system/%course%/%series%/%episodes%', false, ['walk_dirs' => false]);
add_rewrite_tag('%episodes%', '([^/]+)', 'episodes=');
add_rewrite_rule('^system/([^/]+)/([^/]+)/([^/]+)?','index.php?episodes=$matches[3]','top');
//Series
add_permastruct('series', '/system/%course%/%series%', false, ['walk_dirs' => false]);
add_rewrite_tag('%series%', '([^/]+)', 'series=');
add_rewrite_rule('^system/([^/]+)/([^/]+)/?','index.php?series=$matches[2]','top');
}
add_action( 'init', 'my_add_rewrite_rules' );
?>