[wp-hackers] Custom post publish: show error $notice in stead of update $message

[Barry Ceelen]

Hi all,

I'm using a validation function which fires when publishing a particular custom post type:

add_action( 'publish_my_custom_post_type', 'validate_my_custom_post_type' );

function validate_my_custom_post_type() {
	global $post;
	if ( $some_form_value == '' ) {
		$sendback = admin_url( 'post.php?post='.$post->ID.'&action=edit&message=200' );
		wp_redirect( $sendback );
		exit;
	}
}


Although I'm able to filter the feedback messages to show a message when the condition is not met, prompting the user to take action..

add_filter( 'post_updated_messages', 'my_custom_post_type_feedback' );

function my_custom_post_type_feedback( $messages ) {
	$messages['my_custom_post_type']['200'] = __( 'Some feedback message.', 'my_i18n_identifier' );
	return $messages;
}

..I'm looking to show a $notice (error message, different color) in stead if a $message, but haven't found a way to do so.
Any pointers on how to accomplish this?

Cheers,

Barry