# Unable to extend checkout product item in my plugin

**URL:** <https://forum.shopware.com/t/unable-to-extend-checkout-product-item-in-my-plugin/35263>\
**Category:** Themes & Design\
**Created:** [14. März 2016 um 08:46 UTC](https://forum.shopware.com/t/unable-to-extend-checkout-product-item-in-my-plugin/35263 "2016-03-14T08:46:41Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Emaan](https://avatars.discourse-cdn.com/v4/letter/e/e36b37/32.png) [@Emaan](https://forum.shopware.com/u/Emaan)\
**Post date:** [14. März 2016 um 08:46 UTC](https://forum.shopware.com/t/unable-to-extend-checkout-product-item-in-my-plugin/35263/1 "2016-03-14T08:46:41Z")

</div>

I am stuck in very simple thing in my plugin where i am trying to extend checkout section but nothing happens and this issue only happend in checkout although i did extend detail section which works fine.Can you please figure out what i am doing wrong ?? here is the code snippets :

{extends file=“parent:frontend/checkout/items/product.tpl”}  
{block name=‘frontend\_checkout\_cart\_item\_details’ }  
&nbsp; &nbsp;

&nbsp; &nbsp; &nbsp;{block name=‘frontend\_checkout\_cart\_item\_details\_comments’}  
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;  
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;testing

&nbsp; &nbsp; &nbsp;{/block}  
&nbsp; &nbsp;

{/block}

---

<div class="post-metadata">

**Author:** ![Michael\_Telgmann](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.shopware.com/michael_telgmann/32/20289_2.png) [@Michael\_Telgmann](https://forum.shopware.com/u/Michael_Telgmann)\
**Post date:** [14. März 2016 um 14:14 UTC](https://forum.shopware.com/t/unable-to-extend-checkout-product-item-in-my-plugin/35263/2 "2016-03-14T14:14:29Z")

</div>

Hi Emaan,

you are overwriting the whole block ‘frontend\_checkout\_cart\_item\_details’. Is this your intention? Or do want to extend this block? Then you have to use append or prepend. Have a look at our [Dev Docs](https://developers.shopware.com/designers-guide/smarty/).&nbsp;

Did you register your template dir in your plugin bootstrap file? You can find an [example here](https://developers.shopware.com/developers-guide/plugin-quick-start/#event-callback)

Best regards from&nbsp;Schöppingen

![cool](https://europe1.discourse-cdn.com/flex013/uploads/shopware/original/1X/86c57fbace799dd4eb1f1b8a2d3bdc1733f0aea1.png "cool")&nbsp;Michael Telgmann