#33346: Form rendering in Django 4 causes AttributeError during testing
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Reporter: OutOfFocus4 | Owner: nobody
Type: Bug | Status: new
Component: Forms | Version: 4.0
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
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I started updating a project from Django 3 to Django 4. When I ran my unit
tests after the update, one of them failed with an AttributeError.
The full stack trace is
{{{
Traceback (most recent call last):
File "/private/tmp/example/example/tests.py", line 17, in test_formset
self.assertFormsetError(
File "/private/tmp/example/.venv/lib/python3.9/site-
packages/django/test/testcases.py", line 565, in assertFormsetError
if field in context[formset].forms[form_index].errors:
AttributeError: 'ManagementForm' object has no attribute 'forms'
}}}
It looks like rendering the ManagementForm of a formset adds a context to
response.context which contains a "form". Calling "assertFormsetError" to
check for errors in a formset called "form" will check the formset's
errors, but will also try to look at the errors in any "form" in all
contexts, including the ManagementForm.
--
Ticket URL: <https://code.djangoproject.com/ticket/33346>
Django <https://code.djangoproject.com/>
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