Question

A couple users complained that they couldn’t get to their authentication settings page on OSQA. They receive a 500 error. See Screenshot But, it is only after they go through the “I Forgot My Password” or after changing their password.
Looking at the log, the error specifically is:

UnboundLocalError: local variable name 'name' referenced before assignment  

Has anyone else experienced this? If so, how do I fix it.
Thank you in advance for your help.!!

The Stack Trace from the log reads as follows (Sorry for the poor formatting):

DIRECTORY/forum/templatetags/extra_tags.py TIME: 2012-12-13 09:23:31,419 MSG:extra_tags.py:render:312 Error in declare tag, when evaluating:    questions.children_count('answer')
DIRECTORY/apps/django/lib/python2.6/site-packages/django/core/handlers/base.py TIME: 2012-12-14 12:40:31,086 MSG: base.py:handle_uncaught_exception:209 Internal Server Error: /osqa/account/9/authsettings/
Traceback (most recent call last):
  File "DIRECTORY/apps/django/lib/python2.6/site-packages/django/core/handlers/base.py", line 111, in get_response
    response = callback(request, *callback_args, **callback_kwargs)
  File "DIRECTORY/apps/osqa/forum/views/auth.py", line 348, in auth_settings
    'name': name,
UnboundLocalError: local variable 'name' referenced before assignment
DIRECTORY/apps/osqa/forum/views/meta.py TIME: 2012-12-14 12:40:31,093 MSG: meta.py:error_handler:200 
        error executing request:
        PATH: /osqa/account/9/authsettings/
        USER: USER (1)
        METHOD: GET
        POST PARAMETERS:
            None
        GET PARAMETERS:
            None
        HTTP HEADERS:
            mod_wsgi.listener_port: 8080
    HTTP_REFERER: URL/osqa/users/9/USER
            mod_wsgi.listener_host: 
    SERVER_SOFTWARE: Apache
        SCRIPT_NAME: /osqa
        mod_wsgi.handler_script: 
    SERVER_SIGNATURE: 
    REQUEST_METHOD: GET
    PATH_INFO: /account/9/authsettings/
    SERVER_PROTOCOL: HTTP/1.1
    QUERY_STRING: 
    HTTP_ACCEPT_CHARSET: ISO-8859-1,utf-8;q=0.7,*;q=0.3
    HTTP_USER_AGENT: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.97 Safari/537.11
    HTTP_CONNECTION: keep-alive
    HTTP_COOKIE: sessionid=REDACTED; csrftoken=REDACTED
    SERVER_NAME: SERVERNAME
    REMOTE_ADDR: SERVERIP
    mod_wsgi.request_handler: wsgi-script
    wsgi.url_scheme: http
    PATH_TRANSLATED: DIRECTORY/apache2/htdocs/account/9/authsettings/
    SERVER_PORT: 8080
    wsgi.multiprocess: True
    mod_wsgi.input_chunked: 0
    SERVER_ADDR: SERVERIP
    DOCUMENT_ROOT: DIRECTORY/apache2/htdocs
    mod_wsgi.process_group: 
    SCRIPT_FILENAME: DIRECTORY/apps/osqa/scripts/osqa.wsgi
    SERVER_ADMIN: [e-mail]
    wsgi.input: <mod_wsgi.Input object at 0x46feab0>
    HTTP_DNT: 1
    HTTP_HOST: SERVER:8080
    wsgi.multithread: False
    mod_wsgi.callable_object: application
    REQUEST_URI: /osqa/account/9/authsettings/
    HTTP_ACCEPT: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
    wsgi.version: (1, 1)
    GATEWAY_INTERFACE: CGI/1.1
    wsgi.run_once: False
    wsgi.errors: <mod_wsgi.Log object at 0x487c4f0>
    REMOTE_PORT: 51455
    HTTP_ACCEPT_LANGUAGE: en-US,en;q=0.8
    mod_wsgi.version: (3, 3)
    mod_wsgi.application_group: localhost:8080|/osqa
    mod_wsgi.script_reloading: 1
    wsgi.file_wrapper: <built-in method file_wrapper of mod_wsgi.Adapter object at 0x47bf0a8>
    CSRF_COOKIE: REDACTED
    HTTP_ACCEPT_ENCODING: gzip,deflate,sdch

    COOKIES:
             csrftoken: REDACTED
    sessionid: REDACTED

    EXCEPTION INFO:
        Traceback (most recent call last):
      File "DIRECTORY/apps/django/lib/python2.6/site-packages/django/core/handlers/base.py", line 111, in get_response
        response = callback(request, *callback_args, **callback_kwargs)
      File "DIRECTORY/apps/osqa/forum/views/auth.py", line 348, in auth_settings
        'name': name,
    UnboundLocalError: local variable 'name' referenced before assignment

Answer 1

Looking at the source code of osqa, here’s what can be found around the lines where you’re having an issue (the line numbers differ from yours, but that’s probably due to a version difference):

347     for k in auth_keys:
348         provider = AUTH_PROVIDERS.get(k.provider, None)
349
350         if provider is not None:
351             name =  "%s: %s" % (provider.context.human_name, provider.context.readable_key(k))
352         else:
353             from forum.authentication.base import ConsumerTemplateContext
354             "unknown: %s" % ConsumerTemplateContext.readable_key(k)
355 
356         auth_keys_list.append({
357         'name': name,
358         'id': k.id
359         })

Looks like at line 354, we should have name = "unknown: %s" % ConsumerTemplateContext.readable_key(k), but someone forgot that name =.

I can’t be 100% sure about this, as I am not really knowledgeable in osqa, but this statement doesn’t do anything otherwise if we leave it like it is. Additionally, your bug is 100% reproductible provided you can identify why k.provider isn’t in AUTH_PROVIDERS, which I guess has to be pretty uncommon.

---

You might want to file a bug at osqa‘s bug tracker. To solve your issue in the shorter term, you could:

• Figure out why your provider is None. (Apparently, the issue caused by there being and auth_key for the current user that doesn’t correspond to any of AUTH_PROVIDERS).
• Fix that line in the code yourself.