#19616: QuerySet.__contains__ tries to check the length of a None
-------------------------------------+-------------------------------------
Reporter: kalugny@… | Owner: nobody
Type: Bug | Status: new
Component: Database layer | Version: 1.4
(models, ORM) | Resolution:
Severity: Normal | Triage Stage:
Keywords: | Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 1 | UI/UX: 0
-------------------------------------+-------------------------------------
Comment (by anonymous):
Replying to [comment:1 Alex]:
> Can you actually reproduce this in any way? Calling `iter(self)` should
cause `_result_cache` to start being a list.
Yes, I noticed this because it happened to me.
The reproduction is a bit complex, though.
I used this snippet:
http://djangosnippets.org/snippets/1034/
And it happened when trying to iterate an empty QuerySet.
I naturally thought that this is a bug with me or the snippet, but looking
at the code it is pretty obvious that although the function expects that
_result_cache might be None it still tries to len() it.
--
Ticket URL: <https://code.djangoproject.com/ticket/19616#comment:2>
Django <https://code.djangoproject.com/>
The Web framework for perfectionists with deadlines.
--
You received this message because you are subscribed to the Google Groups
"Django updates" group.
To post to this group, send email to django-updates@googlegroups.com.
To unsubscribe from this group, send email to
django-updates+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/groups/opt_out.
