#22426: Django >= 1.6.0 can't handle old style messages cookie
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Reporter: iivvoo | Owner: nobody
Type: Bug | Status: new
Component: contrib.messages | Version: 1.6
Severity: Normal | Keywords: messages, cookie, 1.4
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 0 | UI/UX: 0
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The message cookie format has changed in Django 1.5.x, Django 1.6.x no
longer supports the old format.
If you upgrade your project from Django 1.4.x directly to 1.6.x (skipping
the 1.5 release), your application will fail quickly on old-style message
cookies:
{{{
Exception Type: IndexError
Exception Value:
list index out of range
Exception Location: (...) django/contrib/messages/storage/cookie.py in
process_messages, line 37
}}}
Django 1.5 contained some backward compatibility to handle both styles:
https://github.com/django/django/commit/9e7183073f64e541587e8dcfd8bb3ddeb47f8162
but this code is no longer present in Django 1.6.2
Since you can't ask all your users to delete their cookies if they run
into this error, there's no easy/quick workaround.
It's not uncommon for projects to skip a version. Also, Django 1.4.x is
LTS and people may jump from LTS release to LTS release, which means they
will also run into this issue.
--
Ticket URL: <https://code.djangoproject.com/ticket/22426>
Django <https://code.djangoproject.com/>
The Web framework for perfectionists with deadlines.
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