#29718: Small backwards-incompatibility in Django 2.1
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Reporter: Aymeric Augustin | Owner: nobody
Type: Cleanup/optimization | Status: new
Component: contrib.admin | Version: 2.1
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 have a `cupido.Device` Model and a corresponding ModelAdmin with a
custom view that renders a template called
`admin/cupido/device/search_form.html`.
After upgrading to Django 2.1, the changelist view crashes with a very
confusing error:
{{{
NoReverseMatch at /admin/cupido/device/
Reverse for 'app_list' with keyword arguments '{'app_label': ''}' not
found. 1 pattern(s) tried: ['admin\\/(?P<app_label>auth|cupido)/$']
}}}
This is because Django now supports overriding
`admin/<app_label>/<model_name>/search_form.html` and picks up my
template, which breaks because it was written for a completely different
purpose. This pitfall — the risk of collision with preexisting templates —
could be mentioned in the 2.1 release notes.
Furthermore, the debug view doesn't identify the correct line. It says
there's an error at line 11 (see attachment) but I couldn't identify any
template in which a line 11 contains a `{% url ... %}` tag that could
result in this error. I have no idea what's happening there; I couldn't
put together a good bug report for that problem.
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Ticket URL: <https://code.djangoproject.com/ticket/29718>
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