问题描述
WordPress 3.5 更改了媒体管理，现在媒体库编辑屏幕使用默认的帖子类型 UI 。分类法对于具有不同用户和附件的 WP 安装非常有用，可以提供更多的查找附件和/或添加分类的可能性。
我在 WPSE 上看到过 Can I add a Category Metabox to attachment?，但并不完美地用于 WP 3.5，也没有关于附件上使用自定义类别的信息，不仅仅是帖子的类别。
简而言之：是否可以添加自定义类别/标签到附件，以便在具有 WP 3.5 的媒体库中使用？
最佳解决方案
要从帖子类型帖子添加分类单，默认情况下，很容易添加分类群’category’ 和’tags’ 与一个小插件下面的源代码。
<?php
/**
* Plugin Name: Attachment Taxonomies
* Plugin URI:
* Text Domain: attachment_taxonomies
* Domain Path: /languages
* Description:
* Version: 1.0.0
* Author: Frank Bültge
* Author URI: http://bueltge.de
* License: GPLv3
*/
add_action( 'init', 'fb_attachment_taxonomies' );
function fb_attachment_taxonomies() {
$taxonomies = array( 'category', 'post_tag' ); // add the 2 tax to ...
foreach ( $taxonomies as $tax ) {
register_taxonomy_for_object_type( $tax, 'attachment' ); // add to post type attachment
}
}
要使用附件上的自定义分类法，重要的是，您可以创建自定义分类法，并将其与 attachment 的后缀类似，如下所示。
<?php
/**
* Plugin Name: Attachment Taxonomies
* Plugin URI:
* Text Domain: attachment_taxonomies
* Domain Path: /languages
* Description:
* Version: 1.0.0
* Author: Frank Bültge
* Author URI: http://bueltge.de
* License: GPLv3
*/
if ( function_exists( 'add_filter' ) )
add_action( 'plugins_loaded', array( 'Fb_Attachment_Taxonomies', 'get_object' ) );
/**
* Add Tags and Categories taxonmies to Attachment with WP 3.5
*/
class Fb_Attachment_Taxonomies {
static private $classobj;
/**
* Constructor, init the functions inside WP
*
* @since 1.0.0
* @return void
*/
public function __construct() {
// load translation files
add_action( 'admin_init', array( $this, 'localize_plugin' ) );
// add taxonmies
add_action( 'init', array( $this, 'setup_taxonomies' ) );
}
/**
* Handler for the action 'init'. Instantiates this class.
*
* @since 1.0.0
* @access public
* @return $classobj
*/
public function get_object() {
if ( NULL === self::$classobj ) {
self::$classobj = new self;
}
return self::$classobj;
}
/**
* Localize plugin function.
*
* @uses load_plugin_textdomain, plugin_basename
* @since 2.0.0
* @return void
*/
public function localize_plugin() {
load_plugin_textdomain(
'attachment_taxonomies',
FALSE,
dirname( plugin_basename( __FILE__ ) ) . '/languages/'
);
}
/**
* Setup Taxonomies
* Creates 'attachment_tag' and 'attachment_category' taxonomies.
* Enhance via filter `fb_attachment_taxonomies`
*
* @uses register_taxonomy, apply_filters
* @since 1.0.0
* @return void
*/
public function setup_taxonomies() {
$attachment_taxonomies = array();
// Tags
$labels = array(
'name' => _x( 'Media Tags', 'taxonomy general name', 'attachment_taxonomies' ),
'singular_name' => _x( 'Media Tag', 'taxonomy singular name', 'attachment_taxonomies' ),
'search_items' => __( 'Search Media Tags', 'attachment_taxonomies' ),
'all_items' => __( 'All Media Tags', 'attachment_taxonomies' ),
'parent_item' => __( 'Parent Media Tag', 'attachment_taxonomies' ),
'parent_item_colon' => __( 'Parent Media Tag:', 'attachment_taxonomies' ),
'edit_item' => __( 'Edit Media Tag', 'attachment_taxonomies' ),
'update_item' => __( 'Update Media Tag', 'attachment_taxonomies' ),
'add_new_item' => __( 'Add New Media Tag', 'attachment_taxonomies' ),
'new_item_name' => __( 'New Media Tag Name', 'attachment_taxonomies' ),
'menu_name' => __( 'Media Tags', 'attachment_taxonomies' ),
);
$args = array(
'hierarchical' => FALSE,
'labels' => $labels,
'show_ui' => TRUE,
'show_admin_column' => TRUE,
'query_var' => TRUE,
'rewrite' => TRUE,
);
$attachment_taxonomies[] = array(
'taxonomy' => 'attachment_tag',
'post_type' => 'attachment',
'args' => $args
);
// Categories
$labels = array(
'name' => _x( 'Media Categories', 'taxonomy general name', 'attachment_taxonomies' ),
'singular_name' => _x( 'Media Category', 'taxonomy singular name', 'attachment_taxonomies' ),
'search_items' => __( 'Search Media Categories', 'attachment_taxonomies' ),
'all_items' => __( 'All Media Categories', 'attachment_taxonomies' ),
'parent_item' => __( 'Parent Media Category', 'attachment_taxonomies' ),
'parent_item_colon' => __( 'Parent Media Category:', 'attachment_taxonomies' ),
'edit_item' => __( 'Edit Media Category', 'attachment_taxonomies' ),
'update_item' => __( 'Update Media Category', 'attachment_taxonomies' ),
'add_new_item' => __( 'Add New Media Category', 'attachment_taxonomies' ),
'new_item_name' => __( 'New Media Category Name', 'attachment_taxonomies' ),
'menu_name' => __( 'Media Categories', 'attachment_taxonomies' ),
);
$args = array(
'hierarchical' => TRUE,
'labels' => $labels,
'show_ui' => TRUE,
'query_var' => TRUE,
'rewrite' => TRUE,
);
$attachment_taxonomies[] = array(
'taxonomy' => 'attachment_category',
'post_type' => 'attachment',
'args' => $args
);
$attachment_taxonomies = apply_filters( 'fb_attachment_taxonomies', $attachment_taxonomies );
foreach ( $attachment_taxonomies as $attachment_taxonomy ) {
register_taxonomy(
$attachment_taxonomy['taxonomy'],
$attachment_taxonomy['post_type'],
$attachment_taxonomy['args']
);
}
}
} // end class
看到截图结果的截图，也有区别 – 比较容易，因为我的小字来源。但是我的人的形象在截图示例中与源无关;)
小提示：从模式框中添加媒体的用户界面，对帖子类型的添加是不同于编辑屏幕的帖子类型附件。分层分类单在编辑屏幕中只有一棵树。在模式框中，它是一个输入字段，税则使用逗号作为分隔符。另请参见来自 Helen 的 this post 在 WP Core 博客上。但是请参阅截图中’tags’ 和’categories’ 的定制分类。
次佳解决方案
我会用 Adding a Taxonomy Filter to Admin List for a Custom Post Type? 来扩展 Frank 的答案
寻找这两件事情，媒体类别和分类过滤器，我将 Frank 的代码与 Kaiser’s answer 合并在该帖子中。还添加了我的额外的触摸添加附件上传的帖子类型，作为类别。
它产生：
add_action(
'plugins_loaded',
array ( WPSE76720_Attachment_Taxonomies::get_object(), 'plugin_setup' )
);
// BUELTGE/KAISER/RUDOLF
class WPSE76720_Attachment_Taxonomies
{
protected static $instance = NULL;
public $post_type;
public $taxonomies;
/**
* Used for regular plugin work.
*
* @wp-hook plugins_loaded
* @return void
*/
public function plugin_setup()
{
// Taxonomies filter
add_action( 'load-upload.php', array( $this, 'setup' ) );
// add taxonmies
add_action( 'init', array( $this, 'setup_taxonomies' ) );
add_action( 'add_attachment', array( $this, 'auto_tax' ), 10, 2 );
}
/**
* Constructor, init the functions inside WP
*
* @since 1.0.0
* @return void
*/
public function __construct() {}
/**
* Handler for the action 'init'. Instantiates this class.
*
* @since 1.0.0
* @access public
* @return $instance
*/
public function get_object()
{
NULL === self::$instance and self::$instance = new self;
return self::$instance;
}
/**
* Setup Taxonomies
* Creates 'attachment_tag' and 'attachment_category' taxonomies.
* Enhance via filter `fb_attachment_taxonomies`
*
* @uses register_taxonomy, apply_filters
* @since 1.0.0
* @return void
*/
public function setup_taxonomies()
{
$attachment_taxonomies = array();
// Categories
$labels = array(
'name' => __( 'Media Categories', 'b5f-mc' ),
'singular_name' => __( 'Media Category', 'b5f-mc' ),
'search_items' => __( 'Search Media Categories', 'b5f-mc' ),
'all_items' => __( 'All Media Categories', 'b5f-mc' ),
'parent_item' => __( 'Parent Media Category', 'b5f-mc' ),
'parent_item_colon' => __( 'Parent Media Category:', 'b5f-mc' ),
'edit_item' => __( 'Edit Media Category', 'b5f-mc' ),
'update_item' => __( 'Update Media Category', 'b5f-mc' ),
'add_new_item' => __( 'Add New Media Category', 'b5f-mc' ),
'new_item_name' => __( 'New Media Category Name', 'b5f-mc' ),
'menu_name' => __( 'Media Categories', 'b5f-mc' ),
);
$args = array(
'hierarchical' => TRUE,
'labels' => $labels,
'show_admin_column' => TRUE,
'show_ui' => TRUE,
'query_var' => TRUE,
'rewrite' => TRUE,
);
$attachment_taxonomies[] = array(
'taxonomy' => 'attachment_category',
'post_type' => 'attachment',
'args' => $args
);
$attachment_taxonomies = apply_filters( 'fb_attachment_taxonomies', $attachment_taxonomies );
foreach ( $attachment_taxonomies as $attachment_taxonomy ) {
register_taxonomy(
$attachment_taxonomy['taxonomy'],
$attachment_taxonomy['post_type'],
$attachment_taxonomy['args']
);
}
}
public function setup()
{
add_action( current_filter(), array( $this, 'setup_vars' ), 20 );
add_action( 'restrict_manage_posts', array( $this, 'get_select' ) );
add_filter( "manage_taxonomies_for_attachment_columns", array( $this, 'add_columns' ) );
}
public function setup_vars()
{
$this->post_type = 'attachment';
$this->taxonomies = get_object_taxonomies( $this->post_type );
}
public function add_columns( $taxonomies )
{
return array_merge(
$taxonomies
,$this->taxonomies
);
}
public function get_select()
{
$walker = new WCMF_walker;
foreach ( $this->taxonomies as $tax )
{
wp_dropdown_categories( array(
'taxonomy' => $tax
,'hide_if_empty' => false
,'show_option_all' => sprintf(
get_taxonomy( $tax )->labels->all_items
)
,'hide_empty' => false
,'hierarchical' => is_taxonomy_hierarchical( $tax )
,'show_count' => false
,'orderby' => 'name'
,'selected' => '0' !== get_query_var( $tax )
? get_query_var( $tax )
: false
,'name' => $tax
,'id' => $tax
,'walker' => $walker
) );
}
}
/**
* Add the parent post type as an attachment category
*
* @author Rodolfo Buaiz
*/
public function auto_tax( $post_id )
{
$the_p = get_post( $post_id );
if( $the_p->post_parent > 0 )
{
$cpt = get_post_type( $the_p->post_parent );
$term = term_exists( $cpt, 'attachment_category' );
if( !$term )
$term = wp_insert_term( $cpt, 'attachment_category' );
wp_set_post_terms( $post_id, $term['term_id'], 'attachment_category', true );
}
}
} // end BUELTGE/KAISER/RUDOLF
// KAISER
class WCMF_walker extends Walker_CategoryDropdown
{
var $tree_type = 'category';
var $db_fields = array(
'parent' => 'parent'
,'id' => 'term_id'
);
public $tax_name;
/**
* @see Walker::start_el()
* @param string $output Passed by reference. Used to append additional content.
* @param object $term Taxonomy term data object.
* @param int $depth Depth of category. Used for padding.
* @param array $args Uses 'selected' and 'show_count' keys, if they exist.
* @param int $id
* @return void
*/
function start_el( &$output, $term, $depth, $args, $id = 0 )
{
$pad = str_repeat( ' ', $depth * 3 );
$cat_name = apply_filters( 'list_cats', $term->name, $term );
$output .= sprintf(
'<option class="level-%s" value="%s" %s>%s%s</option>'
,$depth
,$term->slug
,selected(
$args['selected']
,$term->slug
,false
)
,"{$pad}{$cat_name}"
,$args['show_count']
? " ({$term->count})"
: ''
);
}
}
// end KAISER
参考文献
注：本文内容整合自 Google/Baidu/Bing 辅助翻译的英文资料结果。如果您对结果不满意，可以加入我们改善翻译效果：薇晓朵技术论坛。