Upsells won't show custom attribute

Question

F.y.i. The website I'm making is for buying trips on a sailboat.

My upsells file shows the upsell items that are added in the admin (like the upsells file would normally do). The product variable is 'created' like this:

<?php
foreach ($this->getItemCollection()->getItems() as $_link):
// where $_link contains all the product options
endforeach
?>

Later, I have an attribute called 'period' (a select) which shows the period when the ship sets sail.

<?php echo $_link->getAttribute('period'); ?>

Problem, it returns 'null', why?

Answer 1

Instead of

<?php echo $_link->getAttribute('period'); ?>

If the attribute is of type select then use :

<?php echo $_link->getAttributeText('period'); ?>

If the attribute is of type text than use:

<?php echo $_link->getData('period'); ?>

OR

<?php echo $_link->getPeriod(); ?>