I have followed this wiki:
http://www.yiiframework.com/wiki/19/how-to-use-a-single-form-to-collect-data-for-two-or-more-models/
and the actionCreate worked fine BUT the actionUpdate generates a PHP Fatal error: Call to a member function getErrors() on a non-object in yii\framework\web\helpers\CHtml.php
Could anyone please help as the wiki only discussed on actionCreate even though I know both share the view _form. Thank you!