After the commit of 🐛 Form Builder does not fully allow Ajax GET requests Fixed , some forms in our setup are broken and lead to BrokenPostRequestException after submission.
This happens if the the form gets submitted via Ajax using POST and the destination is the form itself.
In such a case the URL changes from /foo to /foo?ajax_form=1&_wrapper_format=drupal_ajax.
I assume that these parameters cause the form_builder to set $ajax_form_request to TRUE when building the form. But now the current method isn't POST anymore but GET because of the redirect after submission.
I created a patch that solves the issue for us by limiting the check for an incomplete post to the method POST.
Needs work
11.0 🔥
The change is currently missing an automated test that fails when run with the original code, and succeeds when the bug has been fixed.
Thanks for reporting. Sounds like something that may need test coverage, 60/40 on that. Since it's a small change but is marked major.