Link autocomplete URL is uninstalled after Apphook reload

[bielfrontera]

Describe the bug Under some circumstances, we get a 500 error after opening the dialog to modify a Link. The error is NoReverseMatch 'dcf_autocomplete' is not a registered namespace, raised from a djangocms_frontend.contrib.link.forms.Select2jqWidget object.

After some digging, we notice that ApphookReloadMiddleware reloads the URLs configuration when a new application is added to the pages tree. And in this case, the URL that is installed by djangocms_frontend is no longer available.

To Reproduce Steps to reproduce the behavior:

1. Check that "cms.middleware.utils.ApphookReloadMiddleware" is included at MIDDLEWARE settings variable.
2. Create a new page, configure it as an app hook and publish it (you'll see this message at the server console: Application url changed and urls_need_reloading signal fired. Please reload the urls.py or restart the server.)
3. Edit any link in any page. You'll get a NoReverseMatch error

[fsbraun]

@bielfrontera Thank you for pointing this out! Also, your analysis is extremely helpful 👍

[fsbraun]

@bielfrontera Could you support a fix by testing the PR #136?

• Do a local pip install git+https://github.com/fsbraun/djangocms-frontend@fix/apphook-reload
• Check link plugin works before and after apphook reload

[bielfrontera]

Hi @fsbraun, yes, I've tested in my environment with the fix and now it works fine! I've tested the link plugin in some scenarios with no problem (adding, modifying and removing apphooks to force urls reload).

Thanks!

[fsbraun]

Great! Will go into the next bugfix release!