In Admin panel, when go to "http://localhost:8000/admin/auth/user/1/"
error occurs

"DatabaseError at /admin/auth/user/1/
Ordering can't span tables on App Engine (content_type__app_label)
/django-testapp/common-apps/djangoappengine/db/compiler.py in
build_query, line 161
"

So Auth framework not usable because of this. I also tested with some
existing django applications
(some of them using ContentType) gets this error .

An easier solution is to change the UserAdmin in
django/contrib/auth/admin.py. Fieldsets specifies which fields to
display. So you would have to remove "user_permissions" and "groups"
from fieldsets. See
http://code.djangoproject.com/browser/django/trunk/django/contrib/aut...

Bye,
Thomas

class UserForm(forms.ModelForm):
  class Meta:
    model = User
    fields = ('username','email','first_name','last_name','is_active',
'is_staff', 'is_superuser',)

from django.contrib.auth.admin import UserAdmin
class CustomUserAdmin(UserAdmin):
  fieldsets = None
  form = UserForm

admin.site.unregister(django.contrib.auth.models.User)
admin.site.register(User,CustomUserAdmin)