RuntimeError Conflicting

[None]

Sometimes I get errors like this:

RuntimeError: Conflicting 'event_deferred_description_description_en_descriae804c3400b52ecb4181ed6574468538' models in application 'ticket': <class 'ticket.models.event.Event_Deferred_description_description_en_descriae804c3400b52ecb4181ed6574468538'> and <class 'ticket.models.event.Event_Deferred_description_description_en_descriae804c3400b52ecb4181ed6574468538'>.

or this:

RuntimeError: Conflicting 'event_deferred_description' models in application 'ticket': <class 'ticket.models.event.Event_Deferred_description'> and <class 'ticket.models.event.Event_Deferred_description'>.

It has appeared after migrating to django 1.7.
Where and how I can find reason to fix this mistake?

[Simon Charette]

Thanks for your report,

Unfortunately we can't help you further if you don't provide a full traceback of the exception.

Please re-open this ticket if you can provide one.

[None]

Internal Server Error: /cabinet/purchased/11534/tickets/
Traceback (most recent call last):
  File "/home/tc/.virtualenvs/ticket/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 111, in get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/tc/.virtualenvs/ticket/local/lib/python2.7/site-packages/django/views/generic/base.py", line 69, in view
    return self.dispatch(request, *args, **kwargs)
  File "/home/tc/.virtualenvs/ticket/local/lib/python2.7/site-packages/django/utils/decorators.py", line 29, in _wrapper
    return bound_func(*args, **kwargs)
  File "/home/tc/.virtualenvs/ticket/local/lib/python2.7/site-packages/django/contrib/auth/decorators.py", line 22, in _wrapped_view
    return view_func(request, *args, **kwargs)
  File "/home/tc/.virtualenvs/ticket/local/lib/python2.7/site-packages/django/utils/decorators.py", line 25, in bound_func
    return func.__get__(self, type(self))(*args2, **kwargs2)
  File "/home/tc/www/ticket/ticket/views/user.py", line 107, in dispatch
    pk=kwargs['payment_id'], user=request.user, result_status=Payment.RESULT_STATUS_SUCCESS
  File "/home/tc/.virtualenvs/ticket/local/lib/python2.7/site-packages/django/shortcuts.py", line 113, in get_object_or_404
    return queryset.get(*args, **kwargs)
  File "/home/tc/.virtualenvs/ticket/local/lib/python2.7/site-packages/django/db/models/query.py", line 351, in get
    num = len(clone)
  File "/home/tc/.virtualenvs/ticket/local/lib/python2.7/site-packages/django/db/models/query.py", line 122, in __len__
    self._fetch_all()
  File "/home/tc/.virtualenvs/ticket/local/lib/python2.7/site-packages/django/db/models/query.py", line 966, in _fetch_all
    self._result_cache = list(self.iterator())
  File "/home/tc/.virtualenvs/ticket/local/lib/python2.7/site-packages/django/db/models/query.py", line 264, in iterator
    requested=requested, only_load=only_load)
  File "/home/tc/.virtualenvs/ticket/local/lib/python2.7/site-packages/django/db/models/query.py", line 1381, in get_klass_info
    requested=next, only_load=only_load)
  File "/home/tc/.virtualenvs/ticket/local/lib/python2.7/site-packages/django/db/models/query.py", line 1381, in get_klass_info
    requested=next, only_load=only_load)
  File "/home/tc/.virtualenvs/ticket/local/lib/python2.7/site-packages/django/db/models/query.py", line 1346, in get_klass_info
    klass = deferred_class_factory(klass, skip)
  File "/home/tc/.virtualenvs/ticket/local/lib/python2.7/site-packages/django/db/models/query_utils.py", line 209, in deferred_class_factory
    return type(str(name), (model,), overrides)
  File "/home/tc/.virtualenvs/ticket/local/lib/python2.7/site-packages/modeltranslation/translator.py", line 265, in __new__
    return super(translation_deferred_mcs, cls).__new__(cls, name, bases, attrs)
  File "/home/tc/.virtualenvs/ticket/local/lib/python2.7/site-packages/django/db/models/base.py", line 285, in __new__
    new_class._meta.apps.register_model(new_class._meta.app_label, new_class)
  File "/home/tc/.virtualenvs/ticket/local/lib/python2.7/site-packages/django/apps/registry.py", line 213, in register_model
    (model_name, app_label, app_models[model_name], model))
RuntimeError: Conflicting 'event_deferred_description' models in application 'ticket': <class 'ticket.models.event.Event_Deferred_description'> and <class 'ticket.models.event.Event_Deferred_description'>.

Request repr(): 
<WSGIRequest
path:/cabinet/purchased/11534/tickets/,
GET:<QueryDict: {u'get-ticket-img': [u'355007']}>,
POST:<QueryDict: {}>,
COOKIES:{'__utma': '227092.104923.141273.14368.14168.4',
 '__utmb': '2992.25.8.1412804',
 '__utmc': '2992',
 '__utmt': '1',
 '__utmz': '2292.1416.4.4.utmcsr=facebook.com|utmccn=(referral)|utmcmd=referral|utmcct=/',
 '_ym_visorc_215': 'w',
 'csrf-token': '**************************',
 'sessionid': '**************************'},
META:{'CONTENT_LENGTH': '',
 'CONTENT_TYPE': '',
 u'CSRF_COOKIE': u'**************************',
 'DOCUMENT_ROOT': '/etc/nginx/html',
 'HTTP_ACCEPT': 'image/webp,*/*;q=0.8',
 'HTTP_ACCEPT_ENCODING': 'gzip,deflate,sdch',
 'HTTP_ACCEPT_LANGUAGE': 'en-US,en;q=0.8,uk;q=0.6',
 'HTTP_CONNECTION': 'keep-alive',
 'HTTP_COOKIE': '__utmt=1; csrf-token=**************************; __utma=705992.4575923.1270073.1666368.1695768.4; __utmb=205992.25.8.1416942804; __utmc=227992; __utmz=22792.1416958.4.4.utmcsr=facebook.com|utmccn=(referral)|utmcmd=referral|utmcct=/; _ym_visorc_21635=w; sessionid=**************************',
 'HTTP_HOST': '**************************',
 'HTTP_REFERER': 'http://**************************/cabinet/purchased/11534/tickets/',
 'HTTP_USER_AGENT': 'Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/37.0.2062.120 Safari/537.36',
 'PATH_INFO': u'/cabinet/purchased/11534/tickets/',
 'QUERY_STRING': 'get-ticket-img=355007',
 'REMOTE_ADDR': '**************************',
 'REMOTE_PORT': '1237',
 'REQUEST_METHOD': 'GET',
 'REQUEST_URI': '/cabinet/purchased/11534/tickets/?get-ticket-img=355007',
 u'SCRIPT_NAME': u'',
 'SERVER_NAME': '**************************',
 'SERVER_PORT': '80',
 'SERVER_PROTOCOL': 'HTTP/1.1',
 'uwsgi.core': 0,
 'uwsgi.node': '**************************',
 'uwsgi.version': '1.2.3-debian',
 'wsgi.errors': <open file 'wsgi_errors', mode 'w' at 0x7fe75c6f34b0>,
 'wsgi.file_wrapper': <built-in function uwsgi_sendfile>,
 'wsgi.input': <uwsgi._Input object at 0x4db2370>,
 'wsgi.multiprocess': True,
 'wsgi.multithread': True,
 'wsgi.run_once': False,
 'wsgi.url_scheme': 'http',
 'wsgi.version': (1, 0)}>

[None]

Internal Server Error: /ajax/
Traceback (most recent call last):
  File "/home/tc/.virtualenvs/ticket/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 111, in get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/tc/www/ticket/ticket/views/main.py", line 377, in ajax_eventsession
    event__is_active=True, event__is_deleted=False)
  File "/home/tc/www/ticket/utils/db.py", line 18, in get_object_or_None
    return queryset.get(*args, **kwargs)
  File "/home/tc/.virtualenvs/ticket/local/lib/python2.7/site-packages/django/db/models/query.py", line 351, in get
    num = len(clone)
  File "/home/tc/.virtualenvs/ticket/local/lib/python2.7/site-packages/django/db/models/query.py", line 122, in __len__
    self._fetch_all()
  File "/home/tc/.virtualenvs/ticket/local/lib/python2.7/site-packages/django/db/models/query.py", line 966, in _fetch_all
    self._result_cache = list(self.iterator())
  File "/home/tc/.virtualenvs/ticket/local/lib/python2.7/site-packages/django/db/models/query.py", line 264, in iterator
    requested=requested, only_load=only_load)
  File "/home/tc/.virtualenvs/ticket/local/lib/python2.7/site-packages/django/db/models/query.py", line 1381, in get_klass_info
    requested=next, only_load=only_load)
  File "/home/tc/.virtualenvs/ticket/local/lib/python2.7/site-packages/django/db/models/query.py", line 1346, in get_klass_info
    klass = deferred_class_factory(klass, skip)
  File "/home/tc/.virtualenvs/ticket/local/lib/python2.7/site-packages/django/db/models/query_utils.py", line 209, in deferred_class_factory
    return type(str(name), (model,), overrides)
  File "/home/tc/.virtualenvs/ticket/local/lib/python2.7/site-packages/modeltranslation/translator.py", line 265, in __new__
    return super(translation_deferred_mcs, cls).__new__(cls, name, bases, attrs)
  File "/home/tc/.virtualenvs/ticket/local/lib/python2.7/site-packages/django/db/models/base.py", line 285, in __new__
    new_class._meta.apps.register_model(new_class._meta.app_label, new_class)
  File "/home/tc/.virtualenvs/ticket/local/lib/python2.7/site-packages/django/apps/registry.py", line 213, in register_model
    (model_name, app_label, app_models[model_name], model))
RuntimeError: Conflicting 'event_deferred_description_description_en_descriae804c3400b52ecb4181ed6574468538' models in application 'ticket': <class 'ticket.models.event.Event_Deferred_description_description_en_descriae804c3400b52ecb4181ed6574468538'> and <class 'ticket.models.event.Event_Deferred_description_description_en_descriae804c3400b52ecb4181ed6574468538'>.

Request repr(): 
<WSGIRequest
path:/ajax/,
GET:<QueryDict: {}>,
POST:<QueryDict: {u'action': [u'get_places_status'], u'csrfmiddlewaretoken': [u'**************'], u'id': [u'1787']}>,
COOKIES:{'__utma': '2272.5227.14191.14191.14121.2',
 '__utmb': '22702.10.9.14570',
 '__utmc': '22792',
 '__utmz': '2272.141621.2.2.utmcsr=**********|utmccn=(referral)|utmcmd=referral|utmcct=/events',
 '_ym_visorc_215': 'w',
 'csrf-token': '**************',
 'sessionid': '**************'},
META:{'CONTENT_LENGTH': '85',
 'CONTENT_TYPE': 'application/x-www-form-urlencoded; charset=UTF-8',
 u'CSRF_COOKIE': u'**************',
 'DOCUMENT_ROOT': '/etc/nginx/html',
 'HTTP_ACCEPT': '*/*',
 'HTTP_ACCEPT_ENCODING': 'gzip, deflate, lzma',
 'HTTP_ACCEPT_LANGUAGE': 'ru-RU,ru;q=0.8,en-US;q=0.6,en;q=0.4',
 'HTTP_CONNECTION': 'keep-alive',
 'HTTP_CONTENT_LENGTH': '85',
 'HTTP_CONTENT_TYPE': 'application/x-www-form-urlencoded; charset=UTF-8',
 'HTTP_COOKIE': 'csrf-token=**************; __utma=222.5267.14191.1491.14161.2; __utmb=227.10.9.1470; __utmc=22792; __utmz=227014121.2.2.utmcsr=************|utmccn=(referral)|utmcmd=referral|utmcct=/events; _ym_visorc_25=w; sessionid=**************',
 'HTTP_HOST': '*********',
 'HTTP_ORIGIN': 'http://*********',
 'HTTP_REFERER': 'http://*********/eventsession/1787/',
 'HTTP_USER_AGENT': 'Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.65 Safari/537.36 OPR/26.0.1656.24 (Edition Yx)',
 'HTTP_X_REQUESTED_WITH': 'XMLHttpRequest',
 'PATH_INFO': u'/ajax/',
 'QUERY_STRING': '',
 'REMOTE_ADDR': '*********',
 'REMOTE_PORT': '3758',
 'REQUEST_METHOD': 'POST',
 'REQUEST_URI': '/ajax/',
 u'SCRIPT_NAME': u'',
 'SERVER_NAME': '*********',
 'SERVER_PORT': '80',
 'SERVER_PROTOCOL': 'HTTP/1.1',
 'uwsgi.core': 1,
 'uwsgi.node': '*********',
 'uwsgi.version': '1.2.3-debian',
 'wsgi.errors': <open file 'wsgi_errors', mode 'w' at 0x4158300>,
 'wsgi.file_wrapper': <built-in function uwsgi_sendfile>,
 'wsgi.input': <uwsgi._Input object at 0x7fbd680020b0>,
 'wsgi.multiprocess': True,
 'wsgi.multithread': True,
 'wsgi.run_once': False,
 'wsgi.url_scheme': 'http',
 'wsgi.version': (1, 0)}>

[Tim Graham]

It looks like this is a problem with the modeltranslation package which does some sort of dynamic model generation. Django never officially supported that and now I think it's forbidden. Does that package claim compatibility with Django 1.7? I don't think this is a bug in Django, please see TicketClosingReasons/UseSupportChannels and reopen with further details if you believe otherwise.