crash when adopting a module which already has a MB entity

I'm getting this on a new module at the moment.

I note there is a canonical link template:
https://git.drupalcode.org/project/module_builder/-/blob/4.0.x/src/Entit...

But there isn't a view_builder handler:
https://git.drupalcode.org/project/module_builder/-/blob/4.0.x/src/Entit...

Both of which are required to build the route in the inherited route_provider.

Are you using the same module that Ru is which complains about canonical templates?

I can't reproduce your problem.

Which module is that? Could be. It's a council's website.

I just installed Module Builder, to generate, a new module and a couple of plugins, but this time I'm not getting past submitting the new module from. Removing the link template, the form submits, but then just leads me to a whole other set of errors however.

Yeah, module_builder_entity_type_build() expects to find it, because it dynamically adds further templates and needs a base URL.

Ru had some module which was crashing when config entities had a canonical template.

Try changing it to 'edit-form' in module_builder_entity_type_build(), since that has the same path.

FWIW I just had a quick look at media entity (which also sometimes has canonical the same path as edit-form) it does still have a view builder defined in the handlers... ah that's for the case where it does have a standalone url. In the other cases the route_provider class returns the edit form route for the canonical route: https://git.drupalcode.org/project/drupal/-/blob/11.x/core/modules/media...

Removing the canonical link template, and changing the line in module_builder_entity_type_build() has also so far worked.

Thanks!

I'm not sure this fixes the original problem, so leaving open