#26707: QueryDict.fromkeys fails in mysterious ways
----------------------------+----------------------------
Reporter: wimglenn | Owner: nobody
Type: Bug | Status: new
Component: Utilities | Version: master
Severity: Normal | Keywords: http querydict
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 0 | UI/UX: 0
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In django.http.QueryDict, we currently have the following weird behaviour
and misleading error messages:
{{{
>>> QueryDict.fromkeys(['k1', 'k2'])
AttributeError: This QueryDict instance is immutable
}}}
It is not possible to pass the mutable kwarg to the initialise in this
way, either:
{{{
>>> QueryDict.fromkeys(['k1', 'k2'], mutable=True)
TypeError: fromkeys() takes no keyword arguments
}}}
Django's querydict is-a dict, so the classmethod factory "fromkeys" should
either
a) work, or
b) be explicitly disabled in the subclass, and documented as such
The relevant section in the docs (
https://docs.djangoproject.com/en/dev/ref/request-
response/#django.http.QueryDict ) says that:
> QueryDict implements all the standard dictionary methods because it’s
a subclass of dictionary. Exceptions are outlined here: ...
However, there is no mention about the fromkeys method.
--
Ticket URL: <https://code.djangoproject.com/ticket/26707>
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