Hi,
I'm adding row level permissions to the admin using this guideline:
http://www.djangosnippets.org/snippets/1054/. Everything works fine
when I add a simple ForeignKey to the User object and use that to
identify records 'owned' by the user. e.g.:
from django.contrib.auth.models import User
User.add_to_class('venue', models.ForeignKey(Venue))
However, when I add a ManyToManyField, so that a user can effectively
be many owners, e.g.:
from django.contrib.auth.models import User
User.add_to_class('venues', models.ManyToManyField(Venue))
I get this Django crash:
Exception Value:
Cannot resolve keyword 'user' into field. Choices are: <shows all
fields of the Venue object>
Exception Location: C:\Python25\lib\site-packages\django-trunk\django
\db\models\sql\query.py in setup_joins, line 1737
Here is the offending line:
print request.user.venues.all()
However, this same operation works fine from the command line:
>>> from django.db import models
>>> from django.contrib.auth.models import User
>>> from dharmaseed.talks.models import Venue
>>> User.add_to_class('venues', models.ManyToManyField(Venue))
>>> dennis = User.objects.get(id=7)
>>> dennis.venues.count()
2
>>> dennis.venues.all()
[<Venue: Insight Meditation Society - Forest Refuge>, <Venue: Insight
Meditation Society - Retreat Center>]
Is this a Django bug? What could be different about request.user
during a web fetch and the user instance I get from the command line?
Should I just go back to ForeignKey ownership instead of ManyToMany?
Any help or hints would be greatly appreciated!
Thank you,
Eric Woudenberg
Trace:
Environment:
Request Method: GET
Request URL: http://127.0.0.1:8000/admin/talks/talk/
Django Version: 1.1 rc 1
Python Version: 2.5.2
Installed Applications:
['django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.sites',
'django.contrib.flatpages',
'django.contrib.redirects',
'dharmaseed.talks',
'dharmaseed.quicklinks',
'zilbo.accounts']
Installed Middleware:
('django.middleware.common.CommonMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.middleware.doc.XViewMiddleware',
'django.contrib.flatpages.middleware.FlatpageFallbackMiddleware',
'django.contrib.redirects.middleware.RedirectFallbackMiddleware')
Traceback:
File "C:\Python25\lib\site-packages\django-trunk\django\core\handlers
\base.py" in get_response
92. response = callback(request, *callback_args,
**callback_kwargs)
File "C:\Python25\lib\site-packages\django-trunk\django\contrib\admin
\sites.py" in root
490. return self.model_page(request, *url.split('/',
2))
File "C:\Python25\lib\site-packages\django-trunk\django\views
\decorators\cache.py" in _wrapped_view_func
44. response = view_func(request, *args, **kwargs)
File "C:\Python25\lib\site-packages\django-trunk\django\contrib\admin
\sites.py" in model_page
509. return admin_obj(request, rest_of_url)
File "C:\Python25\lib\site-packages\django-trunk\django\contrib\admin
\options.py" in __call__
1090. return self.changelist_view(request)
File "C:\Python25\lib\site-packages\django-trunk\django\contrib\admin
\options.py" in changelist_view
897. self.date_hierarchy, self.search_fields,
self.list_select_related, self.list_per_page, self.list_editable,
self)
File "C:\Python25\lib\site-packages\django-trunk\django\contrib\admin
\views\main.py" in __init__
39. self.root_query_set = model_admin.queryset(request)
File "..\dharmaseed\talks\admin.py" in queryset
12. return self.filter_user_queryset(queryset, request)
File "..\dharmaseed\talks\admin.py" in filter_user_queryset
110. print request.user.venues.all()
File "C:\Python25\lib\site-packages\django-trunk\django\db\models
\manager.py" in all
105. return self.get_query_set()
File "C:\Python25\lib\site-packages\django-trunk\django\db\models
\fields\related.py" in get_query_set
424. return superclass.get_query_set
(self)._next_is_sticky().filter(**(self.core_filters))
File "C:\Python25\lib\site-packages\django-trunk\django\db\models
\query.py" in filter
498. return self._filter_or_exclude(False, *args, **kwargs)
File "C:\Python25\lib\site-packages\django-trunk\django\db\models
\query.py" in _filter_or_exclude
516. clone.query.add_q(Q(*args, **kwargs))
File "C:\Python25\lib\site-packages\django-trunk\django\db\models\sql
\query.py" in add_q
1675. can_reuse=used_aliases)
File "C:\Python25\lib\site-packages\django-trunk\django\db\models\sql
\query.py" in add_filter
1569. negate=negate,
process_extras=process_extras)
File "C:\Python25\lib\site-packages\django-trunk\django\db\models\sql
\query.py" in setup_joins
1737. "Choices are: %s" % (name, ",
".join(names)))
Exception Type: FieldError at /admin/talks/talk/
Exception Value: Cannot resolve keyword 'user' into field. Choices
are: audio_header, contact_email, description, id, location, name,
retreat, rssfeed_author, rssfeed_description, rssfeed_image_url,
rssfeed_itunes_image_url, rssfeed_keywords, rssfeed_link,
rssfeed_title, talk, venue_code, website
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