xero2112

@jeffparker Sure thing, my github username is JMV2112, thanks!

I created a plugin and figured out how to add related posts to the the REST API.

function smi_get_related_posts_arguments() {
    $args = array();

    $args['postId'] = array(
	'description' => esc_html('Post ID'),
	'type' => 'integer',
	'default' => '',
	'validate_callback' => 'smi_validate_related_posts',
	'sanitize_callback' => 'absint'
    );

    return $args;
}

function smi_validate_related_posts($value, $request, $param) {
	$attributes = $request->get_attributes();

	if (isset($attributes['args'][$param])) {
	    $argument = $attributes['args'][$param];

	    if (!empty($value)) {
		if ('integer' === $argument['type'] && !is_int((int)$value)) {
		    return new WP_Error('rest_invalid_param', sprintf(esc_html__( '%1$s is not of type Integer', 'smi'), $value ), array( 'status' => 400 ));
		}

		return true;
	    }
	}

	return false;
}

function smi_get_related_posts( $request ) {
    $query_params = $request->get_params();

    if (empty($query_params['postId'])) {
    	return new WP_Error('smi', esc_html('A post ID is required', 'smi'), rest_ensure_response($query_params));
    }
    
    global $yarpp;
    return rest_ensure_response($yarpp->get_related($query_params['postId']));
}

function smi_register_routes() {
    $NAMESPACE = 'smi/v1';

    register_rest_route( $NAMESPACE, '/related-posts', array(
        array(
            'methods' => WP_REST_Server::READABLE,
            'callback' => 'smi_get_related_posts',
            'args' => smi_get_related_posts_arguments()
        ),
    ));
}

add_action( 'rest_api_init', 'smi_register_routes' );

It’s now available at the /wp-json/smi/v1/related-posts

• This reply was modified 4 years, 8 months ago by xero2112.

This would be a useful feature. I work on a React website that feeds data from the WordPress API.