Magento Related Product don't show up - php

Question

I am trying to get the related products block to show up on my product detail page.
I have the folling code in the respective .phtml file
<?php
<?php echo "Related product block"?>
<?php if($this->getItems()->getSize()): ?>
<div class="block block-related">
<div class="block-title">
<strong><span><?php echo $this->__('Related Products') ?></span></strong>
</div>
<div class="block-content">
<p class="block-subtitle"><?php echo $this->__('Check items to add to the cart or') ?> <?php echo $this->__('select all') ?></p>
<ol class="mini-products-list" id="block-related">
<?php foreach($this->getItems() as $_item): ?>
<li class="item">
<?php if(!$_item->isComposite() && $_item->isSaleable()): ?>
<?php if (!$_item->getRequiredOptions()): ?>
<input type="checkbox" class="checkbox related-checkbox" id="related-checkbox<?php echo $_item->getId() ?>" name="related_products[]" value="<?php echo $_item->getId() ?>" />
<?php endif; ?>
<?php endif; ?>
<div class="product">
<img src="<?php echo $this->helper('catalog/image')->init($_item, 'thumbnail')->resize(50) ?>" width="50" height="50" alt="<?php echo $this->htmlEscape($_item->getName()) ?>" />
<div class="product-details">
<p class="product-name"><?php echo $this->htmlEscape($_item->getName()) ?></p>
<?php echo $this->getPriceHtml($_item, true, '-related') ?>
<?php if ($this->helper('wishlist')->isAllow()) : ?>
<?php echo $this->__('Add to Wishlist') ?>
<?php endif; ?>
</div>
</div>
</li>
<?php endforeach ?>
</ol>
<script type="text/javascript">decorateList('block-related', 'none-recursive')</script>
</div>
<script type="text/javascript">
//<![CDATA[
$$('.related-checkbox').each(function(elem){
Event.observe(elem, 'click', addRelatedToProduct)
});
var relatedProductsCheckFlag = false;
function selectAllRelated(txt){
if (relatedProductsCheckFlag == false) {
$$('.related-checkbox').each(function(elem){
elem.checked = true;
});
relatedProductsCheckFlag = true;
txt.innerHTML="<?php echo $this->__('unselect all') ?>";
} else {
$$('.related-checkbox').each(function(elem){
elem.checked = false;
});
relatedProductsCheckFlag = false;
txt.innerHTML="<?php echo $this->__('select all') ?>";
}
addRelatedToProduct();
}
function addRelatedToProduct(){
var checkboxes = $$('.related-checkbox');
var values = [];
for(var i=0;i<checkboxes.length;i++){
if(checkboxes[i].checked) values.push(checkboxes[i].value);
}
if($('related-products-field')){
$('related-products-field').value = values.join(',');
}
}
//]]>
</script>
The echo above the code shows up on my page. Which of course proves that i implemented the block correctly.
Just everything in the if-statement doesn't show.
I spend some time looking for solutions and i tried rebuilding the indexes and my related product is visible on the frontend.
Anyone know how i can fix this?

Answer 1

Magento will always return a low number or 0 for the condition:
$this->getItems()->getSize()
if some/all of the related products are in the user's cart, and consequently items will appear as though they are missing.
To prevent this behaviour, duplicate the core Magento 'Related' class:
/app/code/core/Mage/Catalog/Block/Product/List/Related.php
to local:
/app/code/local/Mage/Catalog/Block/Product/List/Related.php
Then comment out the following lines in the if statement:
if (Mage::helper('catalog')->isModuleEnabled('Mage_Checkout')) {
//mod - show all related products, even if they have been added to the cart
//Mage::getResourceSingleton('checkout/cart')->addExcludeProductFilter($this->_itemCollection,
// Mage::getSingleton('checkout/session')->getQuoteId()
//);
$this->_addProductAttributesAndPrices($this->_itemCollection);
}

Answer 2

On your 4 line:
<?php if($this->getItems()->getSize() > 0 ? true : false) ?>
Try it.

Answer 3

At the top of your code type
var_dump($this->getItems()->getSize()) // does this print NUll, False or > 0
If the code above print NULL or false or less than 1, then do
print_r($this->getItems());
If none of the above print the information you expected then check your block getItems() method
Also where is the closing IF for if($this->getItems()->getSize()):