AutomateWoo Custom Validation Example

functions.php

<?php

add_filter( 'automatewoo_custom_validate_workflow', 'my_custom_workflow_validation' );

/**
 * @param bool $valid
 * @param AW_Model_Workflow $workflow 
 *
 * @return bool
 */
function my_custom_workflow_validation( $valid, $workflow )
{
	$order = $this->get_data_item('order');
	$target_workflow_id = '123';

	// we only want to add the validation to a single workflow
	// which we will target by its id (same as post id)
	if ( $workflow->id != $target_workflow_id ) return $valid;

	// we must have an order
	if ( ! $order ) return $valid;

	$custom_checkout_field = get_post_meta( $order->id, 'custom_checkout_field', true );

	// if checkout field is empty then fail the validation
	if ( ! $custom_checkout_field ) return false;

	return $valid;
}