Extending parent theme template breaks dependant templates

[rmilecki]

Prerequisites

• I understand and accept the project's code of conduct.
• I have already searched in existing issues and found no previous report of this bug.

Describe the bug and add attachments

According to the documentation it should be possible to extend parent theme to introduce small changes (e.g. modify a single template block):
https://devdocs.prestashop-project.org/1.7/themes/reference/template-inheritance/parent-child-feature/

In documentation example product-list.tpl gets extended.

The problem (bug) is that extending product-list.tpl breaks templates that extend product-list.tpl (e.g. category.tpl).

Expected behavior

Extending product-list.tpl should allow modifying that template without affecting behaviour of any other templates.

Steps to reproduce

1. Go to the Design → Theme & Logo
2. Use Add new theme
3. Use Import from your computer to install childtest.zip
4. Switch to the "Child Theme Test" theme

PrestaShop version(s) where the bug happened

1.7.8.8 8.0.0

PHP version(s) where the bug happened

7.2.34 7.3.32

If your bug is related to a module, specify its name and its version

No response

[rmilecki]

My childtest theme contains a very simple product-list.tpl file:

{extends file='parent:catalog/listing/product-list.tpl'}

{block name='content' prepend}
  <h1>Child Theme test</h1>
{/block}

---

Original behaviour

Expected behaviour

Actual (bugged) behaviour

As you can see extending product-list.tpl (e.g. to modify an existing block) breaks themes/classic/templates/catalog/listing/category.tpl. For some reason category.tpl which provides a nice category header doesn't work anymore.

[AureRita]

Hi @rmilecki ,

I reproduce the issue with PrestaShop version 1.7.7.8, I'll add this to the backlog so it can be fixed.

Please be aware that some issues might take a very long time to be resolved. If this one is important to you and you cannot wait for it to be fixed on the project’s own time, we strongly suggest you consider contacting a professional to help you.

If you fix the issue on your end, please contribute it back to the project. Remember that the more people contribute, the better PrestaShop becomes for everyone.

It's maybe because you didn't have a category.tpl on your childtest.zip that you have this issue ( if I add you line on the product-list.tpl I can't go on a page with the faceted search as we can see here )

Thanks

[rmilecki]

It's maybe because you didn't have a category.tpl on your childtest.zip that you have this issue

That's correct, adding all dependant templates to the child theme can be used as a workaround. It can be cumberstone though as there are many templates referencing product-list.tpl.