I’m using wp_dropdown_categories to add a categories filter to the media library. It works fine, except it displays all the categories that are assigned to posts, but I would like it to only display categories that are assigned to attachments. It would also be nice if the count was updated for attachments only as well. Here is the code that adds categories to attachments and then allows you to filter them.
/* Add categories to attachments/media library */
function wptp_add_categories_to_attachments() {
register_taxonomy_for_object_type( 'category', 'attachment' );
}
add_action( 'init' , 'wptp_add_categories_to_attachments' );
/* Add a category filter to images */
function asap_add_image_category_filter() {
$screen = get_current_screen();
if ( 'upload' == $screen->id ) {
$dropdown_options = array( 'show_option_all' => __( 'View all categories', 'asap' ), 'hide_empty' => true, 'hierarchical' => true, 'orderby' => 'name', 'show_count' => true );
wp_dropdown_categories( $dropdown_options );
}
}
add_action( 'restrict_manage_posts', 'asap_add_image_category_filter' );
If there was a post_type argument for wp_dropdown_categories that would be ideal. I known I could create a custom taxonomy, but I’d like to know what the solution is without having to do that.