#27783: VariableDoesNotExist can lead to stack overflows unusually easily
-------------------------------------------+------------------------
Reporter: Ryan O’Hara | Owner: nobody
Type: Bug | Status: new
Component: Template system | Version: 1.10
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 |
-------------------------------------------+------------------------
If a form is overridden to render a template
([https://github.com/gregmuellegger/django-floppyforms django-floppyforms]
does this):
{{{
class ExampleForm(forms.Form):
def as_table(self):
return render(None, 'example.html', {'form': self})
}}}
and the template refers to a nonexistent attribute on the form:
{{{
{{ form.boom }}
}}}
printing the `VariableDoesNotExist` will cause it to attempt to stringify
the form for context again.
Tentative patch changes it to always `repr()`, which seems appropriate and
has the advantage of showing dict context like this:
{{{
Failed lookup for key [author] in {'section': '"News"'}
}}}
instead of like this:
{{{
Failed lookup for key [author] in '{\'section\': \'"News"\'}'
}}}
--
Ticket URL: <https://code.djangoproject.com/ticket/27783>
Django <https://code.djangoproject.com/>
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