get_profile / get_model issue, capitalisation of AUTH_PROFILE_MODULE

[anonymous]

Full email discussion from: ​http://groups.google.com/group/django-users/browse_thread/thread/493e0c048dd07e46/bf8a13a685d81c75?lnk=gst&q=get_profile#bf8a13a685d81c75

The link to the faulty documentation is given at the very end of this entry.

Dear all,

I have difficulties with the get_profile to link my Profile class with
the inbuilt User object.

The error message (which can be obtained through the 'chatroom' view
shown below, or via the shell) is:

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)

/Users/fangohr/local/hg/scico_web/debug/mysite/<ipython console> in <module>()

/Library/Frameworks/Python.framework/Versions/4.0.30002/lib/python2.5/site-packages/django/contrib/auth/models.pyc in get_profile(self)
    291                 app_label, model_name = settings.AUTH_PROFILE_MODULE.split('.')
    292                 model = models.get_model(app_label, model_name)
--> 293                 self._profile_cache = model._default_manager.get(user__id__exact=self.id)
    294             except (ImportError, ImproperlyConfigured):
    295                 raise SiteProfileNotAvailable

AttributeError: 'NoneType' object has no attribute '_default_manager'

This indicates that models.get_model() does return None, but I don't know why.

I have in settings.py:

AUTH_PROFILE_MODULE = 'people.profile'

which I believe is the right entry.

For clarity, I have created a small django-site that can be downloaded in a tar file as:

​http://www.soton.ac.uk/~fangohr/geheim/django/get_profile/debug.tar.gz

or can be viewed online in the untarred version at

​http://www.soton.ac.uk/~fangohr/geheim/django/get_profile/debug

I summarise the most important elements below (so that this email can stand on its own for the archives):

mysite/People/models.py contains:

#-----------
from django.contrib.auth.models import User
from django.db import models

class Profile(models.Model):
    user = models.ForeignKey(User,unique=True)
    homepageURL=models.URLField('homepage',blank=True)

    class Admin:
        pass
#-----------

The corresponding view (which fails) is in mysite/People/views.py:

#-----------
from django.contrib.auth.models import User
from django.contrib.auth.decorators import login_required


def chatrooms(request):
        u = User.objects.get(pk=1) # Get the first user
	user_address = u.get_profile().homepageURL
	#at this point we get an error, equivalent to shell example
#-----------

The mysite/settings.py reads

#-----------
# Django settings for mysite project.

DEBUG = True
TEMPLATE_DEBUG = DEBUG

ADMINS = (
    # ('Your Name', 'your_email@domain.com'),
)

MANAGERS = ADMINS

DATABASE_ENGINE = 'sqlite3'           # 'postgresql_psycopg2', 'postgresql', 'mysql', 'sqlite3' or 'oracle'.
DATABASE_NAME = 'test.dat'             # Or path to database file if using sqlite3.
DATABASE_USER = ''             # Not used with sqlite3.
DATABASE_PASSWORD = ''         # Not used with sqlite3.
DATABASE_HOST = ''             # Set to empty string for localhost. Not used with sqlite3.
DATABASE_PORT = ''             # Set to empty string for default. Not used with sqlite3.

# Local time zone for this installation. Choices can be found here:
# http://en.wikipedia.org/wiki/List_of_tz_zones_by_name
# although not all choices may be available on all operating systems.
# If running in a Windows environment this must be set to the same as your
# system time zone.
TIME_ZONE = 'America/Chicago'

# Language code for this installation. All choices can be found here:
# http://www.i18nguy.com/unicode/language-identifiers.html
LANGUAGE_CODE = 'en-us'

SITE_ID = 1

# If you set this to False, Django will make some optimizations so as not
# to load the internationalization machinery.
USE_I18N = True

# Absolute path to the directory that holds media.
# Example: "/home/media/media.lawrence.com/"
MEDIA_ROOT = ''

# URL that handles the media served from MEDIA_ROOT. Make sure to use a
# trailing slash if there is a path component (optional in other cases).
# Examples: "http://media.lawrence.com", "http://example.com/media/"
MEDIA_URL = ''

# URL prefix for admin media -- CSS, JavaScript and images. Make sure to use a
# trailing slash.
# Examples: "http://foo.com/media/", "/media/".
ADMIN_MEDIA_PREFIX = '/media/'

AUTH_PROFILE_MODULE = 'people.profile'

# Make this unique, and don't share it with anybody.
SECRET_KEY = 'afxb6gs$x!8o3z5+bc@4#g0^z_mpuscs1=#c700@cdpvn^&51@'

# List of callables that know how to import templates from various sources.
TEMPLATE_LOADERS = (
    'django.template.loaders.filesystem.load_template_source',
    'django.template.loaders.app_directories.load_template_source',
#     'django.template.loaders.eggs.load_template_source',
)

MIDDLEWARE_CLASSES = (
    'django.middleware.common.CommonMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
)

ROOT_URLCONF = 'mysite.urls'
#ROOT_URLCONF = 'urls'

TEMPLATE_DIRS = (
    # Put strings here, like "/home/html/django_templates" or "C:/www/django/templates".
    # Always use forward slashes, even on Windows.
    # Don't forget to use absolute paths, not relative paths.
)

INSTALLED_APPS = (
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.sites',
    'mysite.People',
    'django.contrib.admin'
)
#------------

and the url.py is

#------------
from django.conf.urls.defaults import *
import mysite

from django.contrib import admin
admin.autodiscover()

urlpatterns = patterns('',
    (r'^mysite/$', 'mysite.People.views.chatrooms'),
    (r'^admin/(.*)', admin.site.root),
)
#------------

The error can be triggered by viewing

​http://localhost:8000/mysite/

or by running the shell example shown here:

phi:mysite fangohr$ python manage.py shell
Enthought Python Distribution -- http://code.enthought.com

Python 2.5.2 |EPD with Py2.5 4.0.30002 | (r252:60911, Oct 15 2008, 16:58:38) 
Type "copyright", "credits" or "license" for more information.

IPython 0.9.1 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object'. ?object also works, ?? prints more.

In [1]: from django.contrib.auth.models import User

In [2]: myuser=User.objects.all()[0]

In [3]: myuser.get_profile()
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)

/Users/fangohr/local/hg/scico_web/debug/mysite/<ipython console> in <module>()

/Library/Frameworks/Python.framework/Versions/4.0.30002/lib/python2.5/site-packages/django/contrib/auth/models.pyc in get_profile(self)
    291                 app_label, model_name = settings.AUTH_PROFILE_MODULE.split('.')
    292                 model = models.get_model(app_label, model_name)
--> 293                 self._profile_cache = model._default_manager.get(user__id__exact=self.id)
    294             except (ImportError, ImproperlyConfigured):
    295                 raise SiteProfileNotAvailable

AttributeError: 'NoneType' object has no attribute '_default_manager'

In [4]: 

I have checked other entries on the mailing list, but couldn't find the solution to this problem.

Any help is very welcome.

Many thanks,

Hans

PS Version:

phi:mysite fangohr$ python manage.py --version
1.0.2 final

PPS In the database for this example, the admin user is 'admin' and
the password is 'admin' -- in case anybody wants to play with that.

Solution (Karen Tracey):

(Thanks for the very detailed question.) I think you have found a
documentation bug. I do not believe the 'people' part of that
should be normalized to lower case. It is not normalized to lower
case in INSTALLED_APPS, and I don't think it should be normalized
to lower case here. Since you have a capital P in People for your
directory name, try 'People.profile'.

Karen

Note: Changing people.profile to People.profile solves the problem.

Related documentation: ​http://docs.djangoproject.com/en/dev/topics/auth/#auth-profiles

Here it says under 1.: "The (normalized to lower-case) name of the application in which the user profile model is defined (in other words, an all-lowercase version of the name which was passed to manage.py startapp to create the application)."

This is wrong.

[h.fangohr@…]

Tar file of complete Django site to demonstrate the problem.

[Ramiro Morales]

(edited description)