Proper way to get $block->getChildHtml inside the custom phtml file

Question

I want to add default wishlist sidebar section into my Magento_Theme template,

Layout xml file:

<referenceBlock name="header.panel">

            <block class="Magento\Framework\View\Element\Template" name="mylocation.block" template="Magento_Theme::location_link.phtml" after="-">

              <!-- Wishlist sidebar section -->
            <block class="Magento\Wishlist\Block\Customer\Sidebar" name="wishlist_sidebar" as="wishlist" template="Magento_Wishlist::sidebar.phtml"/> 

            </block>

        </referenceBlock>

FYI : The following code coming from core vendor\magento\module-wishlist\view\frontend\templates\sidebar.phtml

  <!-- Wishlist sidebar section -->
<block class="Magento\Wishlist\Block\Customer\Sidebar" name="wishlist_sidebar" as="wishlist" template="Magento_Wishlist::sidebar.phtml"/> 

After added in layout xml file and getting this block using getChildHtml in app\desigh\frontend\Zero\my_theme\Magento_Theme\templates\location_link.phtml

<?php echo $block->getChildHtml('wishlist');?>

Not working, any help thanks.

Answer 1

Your method is not working because your blocks are siblings and do not have a parent/child relationship. The key is the word child in getChildHtml.

If you nest your wishlist block inside the location block that will work.

Also, header.panel is a container, not a block. See https://github.com/magento/magento2/blob/5e57ddd6b0452121e26ce93c74029cf58c4b1d6b/app/code/Magento/Theme/view/frontend/layout/default.xml#L34

<referenceContainer name="header.panel">
        <block class="Magento\Framework\View\Element\Template" name="mylocation.block" template="Magento_Theme::location_link.phtml" after="-">
            <!-- Wishlist sidebar section -->
            <block class="Magento\Wishlist\Block\Customer\Sidebar" name="wishlist_sidebar" as="wishlistc" template="Magento_Wishlist::sidebar.phtml"/> 
        </block>
    </referenceContainer>

Answer 2

Try to move it instead:

   <move element="wishlist_sidebar" destination="mylocation.block" before="-"/>

Also make sure to clear the cache, sometimes not even when running flush and clear cache, magento stop using cached. When it happens I need to clear static files. I recommend disable full_page and block_html cache while you working on it:

bin/magento c:d full_page

bin/magento c:d block_html