ValueError when parsing querydata to autofill a Django admin form

[Nastuzzi Samy]

When giving a pure string instead of an expected integer
(ex: ​http://localhost:8002/admin/core/zone/add/?_to_field=id&_popup=1&event=plsbreak with event = 'plsbreak') , Django admin breaks

"Error during template rendering

In template /usr/local/lib/python3.6/site-packages/django/contrib/admin/templates/admin/includes/fieldset.html, error at line 19"

[Tim Graham]

Can you give more specific steps to reproduce? At first glance, it seems like the problem is putting a string in a foreign key field but I tried with the URL /admin/polls/choice/add/?question=xxx (from the tutorial) and don't see a crash.

[Herbert Fortes]

I also tried to reproduce.

[03/Oct/2018 13:36:58] "POST /admin/core/course/add/?_to_field=id&_popup=1&event=plsbreak HTTP/1.1" 200 10098

I do not sure if it is a valid try but no crash here.

[Herbert Fortes]

Replying to Herbert Fortes:

I also tried to reproduce.

[03/Oct/2018 13:36:58] "POST /admin/core/course/add/?_to_field=id&_popup=1&event=plsbreak HTTP/1.1" 200 10098

I am sorry for the "POST". Copy and Paste the wrong line.
But I can not reproduce the ticket.

[Carlton Gibson]

When giving a pure string instead of an expected integer ...

I couldn't reproduce this.

• When using the expected integer the field is pre-populated with the correct value.
• When using a string (which is clearly invalid) the form renders normally, without a pre-populated value.

I don't see a crash.

Thus there must be something else going on in your situation. If you are able to pin it down to a concrete reproduce case we can investigate.