What does this error mean?

[ydjango]

  

[Django] ERROR (EXTERNAL IP): Internal Server Error:

   File "/usr/local/lib/python2.6/dist-packages/django/core/handlers/base.py", line 111, in get_response
    response = callback(request, *callback_args, **callback_kwargs)

  File "/home/ubuntu/webapps/myapp/core/views.py", line 7048, in loadmydata
    my_group, my_address, my_url, my_name=  get_info_from_session(request)

  File "/home/ubuntu/webapps/myapp/core/myutility.py", line 343, in get_info_from_session
    my_group = request.user.groups.all()[0].id

  File "/usr/local/lib/python2.6/dist-packages/django/db/models/query.py", line 173, in __getitem__
    return self._result_cache[k]

IndexError: list index out of range

I get email from django with the  above error on above line. The application works fine. I do not notice any error on screen. I also do not see error in firebug in the network calls. The the view which contains above line is called from AJAX calls. I am logged into app and authenticated.

Using Django 1.3.1 and Python 2.6 

I can ignore these emails. But any clue what can be causing it?

[Russell Keith-Magee]

What is causing the error? Exactly what the error message says: You're
requesting a specific list index. That index is out of range.

Looking at the stack trace, you're trying to retrieve:

request.user.groups.all()[0]

The error is being raised when there *isn't* an element 0 -- that is,
when a user has no groups.

Yours,
Russ Magee %-)

[ydjango]

But user is logged in and authenticated. His other requests in same session has user and group. Why would few ajax calls not have it?


On Sunday, July 22, 2012 4:39:21 PM UTC-7, Russell Keith-Magee wrote:

[Russell Keith-Magee]

I'll bet good money that one of the things you are assuming is true,
is in fact wrong.

You say that "His other requests in the same session have a user and
group". The evidence you're showing demonstrates that, for whatever
reason, in *this* request, the user *doesn't* have a group.

Unfortunately, nobody but you can determine exactly what is going on.
It's time to spend some quality time with your debugging tools.

Yours,
Russ Magee %-)

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