Trouble getting kwargs into filter

[Clive Bruton]

I am struggling with getting kwarg values into a queryset filter:

class UsersItemsView(ListView):
template_name = 'testapp/user_item_list.html'

def get_queryset(self, **kwargs):
print('kwargs-userlist')
print(kwargs)
#return Item.objects.filter(user__username='clive')
#return Item.objects.filter(user__id=2)
return Item.objects.filter(user__id=kwargs['userlist'])

def dispatch(self, *args, **kwargs):
print('kwargs-userlist')
print(kwargs['userlist'])
return super(UsersItemsView, self).dispatch(*args, **kwargs)


On dispatch, I can see the value for "kwargs['userlist']" printed in
the terminal.

But, the queryset returns an error:

Exception Type: KeyError
Exception Value: 'userlist'

I understand this to mean that the key 'userlist' is not in kwargs,
and this is confirmed if I "print(kwargs)" inside the get_queryset

If I use the hard-coded filters, commented-out above
("user__username='clive'", "user__id=2"), I get the result (from the
template) that I expect.

So, how do I get the "kwargs['userlist']" passed to the queryset?


Thanks


-- Clive

[Stephen J. Butler]

get_queryset() isn't documented as taking any args at all, let alone the kwargs of the request. You sometimes see people do "def get_queryset(self, **kwargs)" to future-proof themselves in case get_queryset does, one day, accept args. But it doesn't right now.

To get the kwargs for the request look at self.kwargs. Also, you might want to save yourself some headache later by using the provided `model = Item`, then calling super().get_queryset(), and modifying that queryset and returning the value. It makes it easier to use other mixins later or provided class-based view attributes.

class UsersItemsView(ListView):
     template_name = 'testapp/user_item_list.html'

     model = Item

     def get_queryset(self):

         qs = super().get_queryset()
         return qs.filter(user__id=self.kwargs['userlist'])

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[Karan Sahu]

Hi,

Do you hire contract based python/django freelancer?

I can help you in this and related tasks  

Best,

Karan Sahu

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[Clive Bruton]

Thank you.