Template parts missing from 6.8 beta 1

[mmcalister]

In the recently released 6.8 beta 1, template parts are missing in the site editor. They were previously found under the patterns menu, but they are no longer listed.

To replicate, you can go to Appearance → Editor → Patterns to see the missing template parts section.

The problem occurs even with the default theme with no other plugins active.

[joemcgill]

Thanks, @mmcalister! I can confirm that this is reproducible in WP 6.8 Beta 1, but not in the latest nightly of the Gutenberg plugin. Judging from some 500 errors I'm seeing in the console log, I suspect that this is a side effect of https://core.trac.wordpress.org/ticket/56481#comment:45.

[joemcgill]

CategoriesGroup component screenshot

[joemcgill]

Replying to joemcgill:

Judging from some 500 errors I'm seeing in the console log, I suspect that this is a side effect of https://core.trac.wordpress.org/ticket/56481#comment:45.

After a bit more testing, I think I've ruled out this theory. Even when the HEAD requests are fixed, these are still not displaying. I can confirm that the component is being rendered, but no templatePartAreas seem to be returned from the useTemplatePartAreas() hook.

[wildworks]

I think it's because the template part area hasn't been added to the REST API index yet. Once the following PR is merged, this issue should be resolved.

​https://github.com/WordPress/wordpress-develop/pull/8422

cc @Mamaduka

[Mamaduka]

Thanks for the ping, @wildworks, and for reporting the issue, @mmcalister!

This was expected and will be fixed via #62574 in Beta 2.

[mmcalister]

Thanks for the info, @wildworks and @Mamaduka! I'll keep an eye on this for the next beta.

[joemcgill]

Following the latest @wordpress/* package syncs in [59961] and the REST API updates in [59965], this appears to be fixed.