To add the taxonmies from post type post, the default, then it is easy to add taxonmies ‘category’ and ‘tags’ with a small plugin liek the source below.
<?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
}
}
For use custom taxonomies on attachments is it important, that you create a custom taxonomy and this to the post type attachment, like the follow plugin.
<?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
See the result on the follow screenshot, also the difference – easier as my small words to the source. But the image of my person in the example screenshot is not relevant to the source 😉
Small hints: the UI from the modal box to add media on post type is little bid different to the edit screen on post type attachment. The hierarchical taxonmies have only a tree in the edit screen. In the modal box is it a input field and the tax works with comma as seperator. See also this post from Helen on the WP Core blog. But see the custom taxonomies for ‘tags’ and ‘categories’ also in a screenshot.
