我已经阅读了我能找到的每篇博文，但似乎没有什么对我有用。我需要做的就是让WP自动为我的自定义帖子类型“照片”分配默认分类/类别（“最新”），这样当用户添加新照片时，“最新”类别已被选中，已分配（例如正常博客帖子的“未分类”）。
declare ( encoding = 'UTF-8' );
! defined( 'ABSPATH' ) and exit;
add_action( 'init', array ( 'MCP_Photos', 'init' ) );
class MCP_Photos
{
/**
* Creates a new instance.
*
* @wp-hook init
* @see __construct()
* @return void
*/
public static function init()
{
new self;
}
/**
* Constructor
*/
public function __construct()
{
$labels = array(
'name' => 'Photography',
'singular_name' => 'Photo',
'add_new' => 'Add New',
'add_new_item' => 'Add New Photo',
'edit_item' => 'Edit Photo',
'new_item' => 'New Photo',
'all_items' => 'All Photos',
'view_item' => 'View Photo',
'search_items' => 'Search Photos',
'not_found' => 'No Photos found',
'not_found_in_trash' => 'No Photos found in Trash',
'parent_item_colon' => '',
'menu_name' => 'Photography'
);
$args = array(
'labels' => $labels,
'public' => true,
'publicly_queryable' => true,
'show_ui' => true,
'show_in_menu' => true,
'query_var' => true,
'rewrite' => array(
'with_front' => false,
'slug' => "photo"
),
'capability_type' => 'post',
'has_archive' => true,
'hierarchical' => true,
'menu_position' => null,
'supports' => array( 'title', 'editor', 'author', 'thumbnail', 'excerpt', 'comments' ),
'taxonomies' => array('post_tag')
);
register_post_type("photos", $args);
// Prevent WordPress from sending a 404 for our new perma structure.
add_rewrite_rule(
'^photo/(\d+)/[^/]+/?$',
'index.php?post_type=photos&p=$matches[1]',
'top'
);
// Inject our custom structure.
add_filter( 'post_type_link', array ( $this, 'fix_permalink' ), 1, 2 );
}
/**
* Filter permalink construction.
*
* @wp-hook post_type_link
* @param string $post_link default link.
* @param int $id Post ID
* @return string
*/
public function fix_permalink( $post_link, $id = 0 )
{
$post = &get_post($id);
if ( is_wp_error($post) || $post->post_type != 'photos' )
{
return $post_link;
}
// preview
empty ( $post->slug )
and $post->slug = sanitize_title_with_dashes( $post->post_title );
return home_url(
user_trailingslashit( "photo/$post->ID/$post->slug" )
);
}
}
// ----------------------------- add photography categories taxonomy ----------------------------------
function create_photo_categories() {
register_taxonomy(
'photography', // name of the taxonomy
'photos', // for which post type it applies
array(
'labels' => array(
'name' => 'Categories',
'add_new_item' => 'Add New Category',
'new_item_name' => "New Category"
),
'show_ui' => true,
'show_tagcloud' => false,
'hierarchical' => true
)
);
}
add_action( 'init', 'create_photo_categories', 0 );
答案 0 :(得分：1)
我刚刚发现这个老问题，没有正确而完整的答案。因此，我正在将其写给对此主题感兴趣的任何人。
我将详细解释：
在通过CPT元框未选择其他术语的情况下，以及如何将此默认术语注册到我们的自定义帖子类型中。
register_post_type函数注册您的CPT。 register_taxonomy函数注册自定义分类法。 注意：我已经更改了问题中显示的代码的结构，并使用了单例方法，并删除了该问题的特定部分（例如，重写规则等）。我还将CPT名称更改为photo，分类名称为gallery_cat，默认词条为default_gallery_cat。
重要提示： ：
default_{$taxonomy}选项用于将默认类别设置为 不可移动，例如默认的uncategorizedWP类别
注意：：您只能将一个术语指定为默认分类法术语。
我在代码中写了其他细节作为注释。它是一个功能正常的WP插件。
<?php
/*
Plugin Name: Sample CPT Default Taxonomy
Plugin URI: http://www.yashar.site/
Description: A sample plugin to register Photo CPT and gallery_cat custom taxonomy and add a default category.
Version: 1.0
Author: Yashar Hosseinpour
Author URI: http://www.yashar.site/
*/
namespace My_Plugin;
if ( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly
class Photo
{
/**
* Instance of Photo
* @access protected
* @var object $instance The instance of Photo.
*/
private static $instance = null;
/**
* Photo constructor.
* This is a private constructor to be used in getInstance method to do things in a singleton way
* It's a good idea to leave this constructor empty and make `init` method public to use it outside of the class, which is a good thing for Unit Testing
* @access private
*/
private function __construct()
{
$this->init();
}
/**
* Initialize the plugin.
* You can make it public and use it outside of the class
* @access private
* @return void
*/
private function init()
{
// It's possible to use one method to cover these and hook it to `init`. I just like the way using single purpose OOP methods.
// Note the priorities
add_action('init', [$this, 'register_cpt'], 10);
add_action('init', [$this, 'register_gallery_cat_tax'], 11);
add_action('init', [$this, 'insert_default_gallery_cat_term' ], 12);
// `save_post_{$post->post_type}` hook is used. Doc: https://developer.wordpress.org/reference/hooks/save_post_post-post_type/
add_action( 'save_post_photo', [$this, 'set_default_gallery_cat'], 99, 2 );
}
/**
* Register `Photo` CPT and `gallery_cat` taxonomy to it
* This should be done after `init`
* @access public
* @wp-hook init
* @return void
*/
public function register_cpt()
{
$labels = array(
'name' => 'Photos',
'singular_name' => 'Photo',
'add_new' => 'Add New',
'add_new_item' => 'Add New Photo',
'edit_item' => 'Edit Photo',
'new_item' => 'New Photo',
'all_items' => 'All Photos',
'view_item' => 'View Photo',
'search_items' => 'Search Photos',
'not_found' => 'No Photos found',
'not_found_in_trash' => 'No Photos found in Trash',
'parent_item_colon' => '',
'menu_name' => 'Photography'
);
$args = array(
'public' => true,
'show_in_menu' => true,
'labels' => $labels,
'supports' => array( 'title', 'editor', 'author', 'thumbnail', 'excerpt', 'comments' ),
'taxonomies' => array('post_tag', 'gallery_cat')
);
register_post_type('photo', $args);
}
/**
* Register `gallery_cat` taxonomy
* This should be done after registering CPT
* @access public
* @wp-hook init
* @return void
*/
public function register_gallery_cat_tax() {
$labels = [
'name' => 'Gallery Categories',
'singular_name' => 'Gallery Category',
'all_items' => 'All Gallery Categories',
'edit_item' => 'Edit Category',
'view_item' => 'View Category',
'update_item' => 'Update Category',
'add_new_item' => 'Add New Category',
'new_item_name' => 'Category Name',
'parent_item' => 'Parent Category',
'parent_item_colon' => 'Parent Category:',
'search_items' => 'Search Gallery Categories',
'popular_items' => 'Popular Categories',
];
register_taxonomy(
'gallery_cat',
'photo',
array(
'labels' => $labels,
'show_ui' => true,
'show_tagcloud' => false,
'hierarchical' => true
)
);
}
/**
* Insert default gallery_cat
* `default_{$taxonomy}` option is used to make this term as default `gallery_cat` term (non-removable)
* @access public
* @wp-hook init
*/
public function insert_default_gallery_cat_term()
{
// check if category(term) exists
$cat_exists = term_exists('default_gallery_cat', 'gallery_cat');
if ( !$cat_exists ) {
// if term is not exist, insert it
$new_cat = wp_insert_term(
'Default Gallery Name',
'gallery_cat',
array(
'description' => 'This is your default gallery category',
'slug' => 'default_gallery_cat',
)
);
// wp_insert_term returns an array on success so we need to get the term_id from it
$default_cat_id = ($new_cat && is_array($new_cat)) ? $new_cat['term_id'] : false;
} else {
//if default category is already inserted, term_exists will return it's term_id
$default_cat_id = $cat_exists;
}
// Setting default_{$taxonomy} option value as our default term_id to make them default and non-removable (like default uncategorized WP category)
$stored_default_cat = get_option( 'default_gallery_cat' );
if ( empty( $stored_default_cat ) && $default_cat_id )
update_option( 'default_gallery_cat', $default_cat_id );
}
/**
* Add an default `gallery_cat` taxonomy term for `photo` CPT on save
* If no `gallery_cat` is selected, default gallery_cat will be registered to the post
* @access public
* @wp-hook save_post_photo
* @param integer $post_id
* @param object $post
*/
public function set_default_gallery_cat($post_id, $post)
{
if ( 'publish' === $post->post_status ) {
$gallery_cats = wp_get_post_terms( $post_id, 'gallery_cat' );
$default_gallery_cat = (int) get_option('default_gallery_cat');
if ( empty($gallery_cats) ) {
wp_set_object_terms( $post_id, $default_gallery_cat, 'gallery_cat' );
}
}
}
/**
* Instance
* Used to retrieve the instance of this class.
* @access public
* @return object $instance of the class
*/
static public function getInstance() {
if (self::$instance == NULL) {
self::$instance = new self();
}
return self::$instance;
}
}
// Run this
Photo::getInstance();
已通过全面测试，并且可以在WP 5.1上运行
注意：：save_post_{$post->post_type}钩子用于在保存photo CPT时添加默认类别术语。
请注意，我已经使用init钩子来注册内容，但是如果您 在多站点WP安装上，您可以考虑使用 改为使用wp_loaded挂钩（并且您可能还需要进行其他修改）。
P.S。我可能会在不久的将来完成并将此代码发布到Github上。
答案 1 :(得分：0)
在 register_post_type 函数的 $args - ＆gt;
taxonomies => array('categories');
删除
注册自定义帖子类型使用功能的分类法
答案 2 :(得分：0)
添加像这样的分类法。
'taxonomies' => array('timeline','category',),
管理员的总代码变为如此：
// Admin
'capability_type' => 'post',
'menu_icon' => 'dashicons-businessman',
'menu_position' => 10,
'query_var' => true,
'show_in_menu' => true,
'show_ui' => true,
'taxonomies' => array('timeline','category',),
'supports' => array(
'title',
'editor',
'custom_fields',
'timeline',
),
答案 3 :(得分：-1)
修改wp-includes/taxonomy.php并将自定义帖子类型名称写在'custom post name here'：
