问题
I am using "Video" theme for my wordpress website. In this theme, videos post type and "videoscategory" taxonomy are defined. Here is the register code for taxonomy:
add_action("init", "custom_posttype_menu_wp_admin1");
function custom_posttype_menu_wp_admin1()
{
register_post_type('videos',
array('label' => __('Videos','templatic'),
'labels' => array( 'name' => __('Video','templatic'),
'singular_name' => __('Video','templatic'),
'add_new' => __('Add Video','templatic'),
'add_new_item'=> __('Add New Video','templatic'),
'edit' => __('Edit','templatic'),
'edit_item'=> __('Edit Video','templatic'),
'new_item' => __('New Video','templatic'),
'view_item' => __('View Video','templatic'),
'search_items' => __('Search Videos','templatic'),
'not_found' => __('No Videos found','templatic'),
'not_found_in_trash'=> __('No Videos found in trash','templatic')
),
'public' => true,
'can_export' => true,
'show_ui' => true, // UI in admin panel
'_builtin' => false, // It's a custom post type, not built in
'_edit_link' => 'post.php?post=%d',
'capability_type' => 'post',
'menu_icon' => get_bloginfo('template_url').'/images/favicon.ico',
'hierarchical' => false,
'rewrite' => array("slug" => "videos"), // Permalinks
'query_var' => "videos", // This goes to the WP_Query schema
'supports' => array( 'title',
'author',
'excerpt',
'thumbnail',
'comments',
'editor',
'trackbacks',
'custom-fields',
'revisions') ,
'show_in_nav_menus' => true ,
'taxonomies' => array('videoscategory','videostags')
)
);
// Register custom taxonomy
register_taxonomy( "videoscategory",
array( "videos" ),
array ( "hierarchical"=> true,
"label"=> "Category",
'labels'=> array( 'name' => __('Category','templatic'),
'singular_name'=> __('Category','templatic'),
'search_items'=> __('Search Category','templatic'),
'popular_items' => __('Popular Category','templatic'),
'all_items'=> __('All Category','templatic'),
'parent_item' => __('Parent Category','templatic'),
'parent_item_colon' => __('Parent Category:','templatic'),
'edit_item' => __('Edit Category','templatic'),
'update_item'=> __('Update Category','templatic'),
'add_new_item'=> __('Add New Category','templatic'),
'new_item_name'=> __('New Make Category','templatic') ),
'public'=> true,
'show_ui' => true,
'query_var'=> true,
"rewrite" => true
)
);
}
I added some categories under videoscategory taxonomy. Now i want to get all the categories that belongs to videoscategory. I googled the whole day, and I use
$tax_terms =get_terms('videoscategory');
but get empty array. Does anyone know what is the problem? thanks.
回答1:
Here is use this code, you definitely find your solution
$cat_args = array(
'orderby' => 'term_id',
'order' => 'ASC',
'hide_empty' => true,
);
$terms = get_terms('videoscategory', $cat_args);
foreach($terms as $taxonomy){
$term_slug = $taxonomy->slug;
$tax_post_args = array(
'post_type' => 'videos',
'posts_per_page' => 999,
'order' => 'ASC',
'tax_query' => array(
array(
'taxonomy' => 'videoscategory',
'field' => 'slug',
'terms' => '$term_slug'
)
)
);
$tax_post_qry = new WP_Query($tax_post_args);
if($tax_post_qry->have_posts()) :
while($tax_post_qry->have_posts()) :
$tax_post_qry->the_post();
the_title();
endwhile;
else :
echo "No posts";
endif;
} //end foreach loop
回答2:
There is an example in the codex when you visit the get_terms page
$terms = get_terms('videoscategory');
if ( !empty( $terms ) && !is_wp_error( $terms ) ){
echo "<ul>";
foreach ( $terms as $term ) {
echo "<li>" . $term->name . "</li>";
}
echo "</ul>";
}
Just a tip: objects created under a custom taxonomy is called terms, not categories. Please see this post I've done on WPSE
回答3:
Here's an example for you that I used for a FAQ post type:
get_header();
if(have_posts()) {
$args = array (
'orderby' => 'name',
'order' => 'ASC',
'hide_empty' => true,
);
$terms = get_terms( 'faq_levels', $args );
foreach ( $terms as $term ) {
echo $term->slug;
$post_args = array (
'post_type' => 'faq',
'faq_levels' => $term->name,
);
$query = new WP_Query( $post_args );
while ( $query->have_posts() ) {
$query->the_post(); ?>
and I created the post type like this:
function post_type_faqs() {
register_post_type('faq', array(
'label'=>'FAQ',
'menu_icon' => '',
'labels'=>array(
'name'=>_x('FAQs', 'post type general name'),
'singular_name'=>_x('FAQ', 'post type singular name'),
'add_new'=>_x('Add New', 'faq'),
'add_new_item'=>__('Add New FAQ'),
'edit_item'=>__('Edit FAQ'),
'new_item'=>__('New FAQ'),
'view_item'=>__('View FAQ'),
'search_items'=>__('Search FAQs'),
'not_found'=>__('No faqs found'),
'not_found_in_trash'=>__('No faqs found in Trash'),
'parent_item_colon'=>''),
'public'=>true,
'publicly_queryable'=>true,
'show_ui'=>true,
'query_var'=>true,
'rewrite'=>false,
'capability_type'=>'post',
'supports'=>array('title','thumbnail','post-formats'),
'taxonomies'=>array('post_tag','faq_category'),
'slug'=>'faq',
'hierarchical'=>false,
'menu_position'=>6,
'show_in_nav_menus'=> true,
'has_archive' => true,
'can_export' => true,
'register_meta_box_cb' => 'faq_add_meta_boxes'
));
}
add_action('init', 'post_type_faqs');
/**
* Create Subjects taxonomy
*/
function faq_category() {
$labels = array(
'name' => _x( 'Categories', 'Taxonomy General Name', 'dc' ),
'singular_name' => _x( 'Category', 'Taxonomy Singular Name', 'dc' ),
'menu_name' => __( 'Categories', 'dc' ),
'all_items' => __( 'All Categories', 'dc' ),
'parent_item' => __( 'Parent Category', 'dc' ),
'parent_item_colon' => __( 'Parent Category:', 'dc' ),
'new_item_name' => __( 'New Category', 'dc' ),
'add_new_item' => __( 'Add New Category', 'dc' ),
'edit_item' => __( 'Edit Category', 'dc' ),
'update_item' => __( 'Update Category', 'dc' ),
'separate_items_with_commas' => __( 'Separate categories with commas', 'dc' ),
'search_items' => __( 'Search Categories', 'dc' ),
'add_or_remove_items' => __( 'Add or remove categories', 'dc' ),
'choose_from_most_used' => __( 'Choose from the most used categories', 'dc' ),
'not_found' => __( 'Not Found', 'dc' ),
);
$args = array(
'labels' => $labels,
'hierarchical' => true,
'public' => true,
'show_ui' => true,
'show_admin_column' => true,
'show_in_nav_menus' => true,
'show_tagcloud' => true,
'sort_column' => 'menu_order',
);
register_taxonomy( 'faq_category', array( 'faq' ), $args );
}
add_action( 'init', 'faq_category', 0 );
来源：https://stackoverflow.com/questions/25563809/wordpress-get-taxonomy-list-of-custom-post-type