magento - Sort Magento related products by ASC sort order with NULLs last (or NULLs excluded)

Question

My Magento 1.6.2.0 installation currently sorts related products in ascending order by sort order (thanks to this Q/A). The answer detailed there works beautifully, however I prefer my products with a sort order value of NULL be listed last or completely excluded. I've played with addAttributeToSelect() but I have been unsuccessful.

Answer 1

这可能不是最好的解决方案，但我在我的 related.phtml 文件中添加了一条 if 语句。

    <?php foreach($this->getItems() as $_item): ?>
        // add the if statement immediately after the foreach loop
        <?php if ( !is_null($_item->getPosition()) ): ?>
        . . . .
        <?php endif; ?>
    <?php endforeach; ?>