I currently developing a wordpress plugin that is using two custom post types. What I want to know here: is it possible to add a custom post type menu as another custom post type’s sub menu?
Yes. When you register your post type you need to set show_in_menu
to the page you would like it displayed on.
Adding a custom post type as a sub-menu of Posts
Here we set the “movies” post type to be included in the sub-menu under Posts.
register_post_type( 'movies',
array(
'labels' => array(
'name' => __( 'Movies' ),
'singular_name' => __( 'Movie' )
),
'public' => true,
'has_archive' => true,
'show_in_menu' => 'edit.php'
)
);
If you have a taxonomy registered to the custom post type it will need to be added to the page as well.
In add_submenu_page()
the first argument is the page to assign it to and the last is the menu slug.
add_action('admin_menu', 'my_admin_menu');
function my_admin_menu() {
add_submenu_page('edit.php', 'Genre', 'Genre', 'manage_options', 'edit-tags.php?taxonomy=genre');
}
Adding a custom post type as a sub-menu of another custom post type
To add the pages to another custom post type include the post type’s query string parameter along with the page names.
To add the CPT Movies and its taxonomy Genre under the post type Entertainment adjust the code like this.
edit.php
becomes edit.php?post_type=entertainment
edit-tags.php
becomes edit-tags.php?taxonomy=genre&post_type=entertainment
register_post_type( 'movies',
array(
'labels' => array(
'name' => __( 'Movies' ),
'singular_name' => __( 'Movie' )
),
'public' => true,
'has_archive' => true,
'show_in_menu' => 'edit.php?post_type=entertainment'
)
);
add_action('admin_menu', 'my_admin_menu');
function my_admin_menu() {
add_submenu_page('edit.php?post_type=entertainment', 'Genre', 'Genre', 'manage_options', 'edit-tags.php?taxonomy=genre&post_type=entertainment');
}