I have a Model called Message that I use django-guardian for object level permission. The idea is that both the from_user
and to_user
in a message instance should have the can_view_message
permission. This function is to display a list of messages with the same message thread_id
(automatically created when a message was created).
@permission_required_or_403('can_view_message', (Message, 'pk', 'pk'))
def message_thread(request, pk):
selected_message = Message.objects.get(pk=pk)
threads = Message.objects.filter(thread_id=selected_message.thread_id)
context = RequestContext(request, {
'latest_messages': threads,
})
return render(request, 'myapp/messages_thread.html', context)
The url pattern for this request:
url(r'^messages/([-_a-z0-9]{1,32})/$', message_views.message_thread),
Here's the Message Model:
class Message(models.Model):
from_user = models.ForeignKey(User, verbose_name='From', related_name='%(class)s_from_user')
to_user = models.ForeignKey(User, verbose_name='To', related_name='%(class)s_to_user')
send_time = models.DateTimeField('Send Time', blank=True)
msg_content = models.TextField('Message')
thread_id = models.CharField('Thread', max_length=50, blank=True)
class Meta:
permissions = (
('can_view_message', 'Can View Message'),
)
I use post_create signal to assign permission:
def view_message(sender, instance, **kwargs):
assign_perm('can_view_message', instance.from_user, instance)
assign_perm('can_view_message', instance.to_user, instance)
post_save.connect(view_message, sender=Message, dispatch_uid="view_message_permission")
However I'm getting the following error but don't really know why:
GuardianError at /myapp/messages/13/
Argument pk was not passed into view function
Request Method: GET
Request URL: http://127.0.0.1:8000/myapp/messages/13/
Django Version: 1.8.4
Exception Type: GuardianError
Exception Value:
Argument pk was not passed into view function
Exception Location: /Library/Python/2.7/site-packages/guardian/decorators.py in _wrapped_view, line 111
Python Executable: /usr/bin/python
Python Version: 2.7.6
Any help will be much appreciated, thank you so much!
With @Burhan Khalid's comment, I checked my request url, and it was url(r'^messages/([-_a-z0-9]{1,32})/$', message_views.message_thread),
I changed it to url(r'^messages/(?P<pk>[-\w]+)/$', message_views.message_thread)
, with the pk in the request, now it works perfect.