#29411: Pickling of a form fails after a form was used in a template
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Reporter: Torsten Bronger | Owner: nobody
Type: Bug | Status: new
Component: Forms | Version: 2.0
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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The following view function fails from its second invocation on:
{{{
def main(request):
import django.forms as forms
import pickle
pickle.dump(forms.Form(), open("/dev/null", "wb")) # This fails, but
not at the very first invocation.
return render(request, "main.html", {"example_form": ExampleForm()})
}}}
Steps to reproduce:
1. `django-admin startproject pickle_problem`
2. `cd pickle_problem`
3. Apply the attached patch with `-p1`.
4. Apply migrations, start testserver.
5. Open the URL “/” on the testserver. You should see a bogus form with
one boolean field.
6. Reload the page.
What happens:
The pickling of `form.Form()` fails. See the attached traceback.
I observe this problem since Django 1.11. Up to Django 1.10, it has
worked fine for me.
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Ticket URL: <https://code.djangoproject.com/ticket/29411>
Django <https://code.djangoproject.com/>
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