Why can't I call custom if-check on product view?

Question

I've got a (custom) module which allows me to add YouTube video's to a product. I call that module in my local.xml like such:

<block type="mymod_catalog/video" name="video" template="catalog/product/view/video.phtml" />

I call the block in my catalog/product/view.phtml like so:

<?php echo $this->getChildHtml('video') ?>

And in the included template file video.phtml it has a check like this:

<?php if($this->getProductVideo()): ?>

But if I use that if-check in my view.phtml it doesn't work (it's always false). I can't figure out why, though. Can anybody tell me what I'm missing?

Answer 1

It does not work because the getProductVideo method is defined in the block with the alias mymod_catalog/video and inside the template video.phtml, $this is an instance of that block.

In view.phtml, $this is an instance of Magento_Catalog_Block_Product_View and calling the method getProductVideo that does not exist in this block results in calling Magento_Catalog_Block_Product_View::getData('product_video') which I assume will always return null because you never call setProductVideo on this class instance.

You can try to use this in the view.phtml.

<?php $videoBlock = $this->getChild('video');?>
<?php if ($videoBlock && $videoBlock->getProductVideo()) : ?>
    <!-- your code here -->
<?php endif; ?>