John Davidson

Message:

I am using the WP REST API to return data from a custom post that has a custom taxonomy. This is my code -

    add_action( 'rest_api_init', 'register_book_type' );

function register_book_type() {

    register_rest_field( 'lesson',

        'book_type',

        array(

            'get_callback'    => 'get_book_type',

            'update_callback' => null,

            'schema'          => null,

        )

    );

}

function get_book_type( $object, $field_name, $request ) {

    $name = [];

    $object = get_terms(array(

      'taxonomy' => 'book_type'

    ));

    foreach ($object as $term) :

      array_push($name, $term->name.' ');

    endforeach;

    return implode('/ ', $name);

}

This returns all the taxonomy names, but I need it to return only the taxonomy names that apply to the specific post.

How can I change this so it only displays taxonomy names for the specific post?

---

My Answer:
> 'get_book_type',_ )_ );_}_function get_book_type( $object, $field_name, $request ) {_ $terms = get_the_terms( $object['id'], 'book_type' );_ if ( !empty( $terms ) ) {_ $term = array_shift( $terms );_ return $term->name;_ } else {_ return '';_ }_}_This code registers a custom field 'book_type' for the custom post type 'lesson' and defines a callback function 'get_book_type' to retrieve the custom taxonomy term name for the post. The function uses the 'get_the_terms' function to get the terms associated with the post ID and returns the name of the first term found. If no terms are found, it returns an empty string.