Getting wordpress custom fields in response of wordpress API

wordpress_custom_fields.md

• "access" is a custom field of the posts. Add this to the functions.php:

function get_post_meta_cb($object, $field_name, $request){
        return get_post_meta($object['id'], $field_name, true); 
}
function update_post_meta_cb($value, $object, $field_name){
  return update_post_meta($object['id'], $field_name, $value); 
}
add_action('rest_api_init', function(){
  register_rest_field('post', 'access', 
    array(
    'get_callback' => 'get_post_meta_cb', 
    'update_callback' => 'update_post_meta_cb', 
    'schema' => null
    )
  ); 
});