/**
* Register a genre post type, with REST API support
*
* Based on example at: https://codex.wordpress.org/Function_Reference/register_taxonomy
*/
add_action( 'init', 'my_book_taxonomy', 30 );
function my_book_taxonomy() {
$labels = array(
'name' => _x( 'Genres', 'taxonomy general name' ),
'singular_name' => _x( 'Genre', 'taxonomy singular name' ),
'search_items' => __( 'Search Genres' ),
'all_items' => __( 'All Genres' ),
'parent_item' => __( 'Parent Genre' ),
'parent_item_colon' => __( 'Parent Genre:' ),
'edit_item' => __( 'Edit Genre' ),
'update_item' => __( 'Update Genre' ),
'add_new_item' => __( 'Add New Genre' ),
'new_item_name' => __( 'New Genre Name' ),
'menu_name' => __( 'Genre' ),
);
$args = array(
'hierarchical' => true,
'labels' => $labels,
'show_ui' => true,
'show_admin_column' => true,
'query_var' => true,
'rewrite' => array( 'slug' => 'genre' ),
'show_in_rest' => true,
'rest_base' => 'genre',
'rest_controller_class' => 'WP_REST_Terms_Controller',
);
register_taxonomy( 'genre', array( 'book' ), $args );
}
Add these to enable rest support
'show_in_rest' => true,
'rest_base' => 'genre',
'rest_controller_class' => 'WP_REST_Terms_Controller',
//remove show_in_rest from. argument then this will work
$args = array(
'hierarchical' => true,
'labels' => $labels,
'show_ui' => true,
'show_admin_column' => true,
'query_var' => true,
'rewrite' => array( 'slug' => 'genre' ),
'show_in_rest' => true, //remove
'rest_base' => 'genre',// remove
'rest_controller_class' => 'WP_REST_Terms_Controller',//remove
);
register_taxonomy( 'genre', array( 'book' ), $args );