On Saturday, 7 April 2012 16:40:05 UTC+1, Dave wrote:
>
> Hi, I need to manipulate my pk when using new class based views. In
> order to DRY I think what's needed is to superclass SingleObjectMixin.
>
> I have the following but it's not working. Greatly appreciate help/
> suggestions!
>
> In view.py have the below which does not work.
>
> from django.views.generic.detail import SingleObjectMixin
> class SingleObjectMixin(SingleObjectMixin):
>
> def get_object(self, *args, **kwargs):
> queryset = self.get_queryset()
> pk = pid_to_oid(self.kwargs.get('pk'))
> queryset = queryset.filter(pk=pk)
> obj = queryset.get()
> return obj
>
> return super(SingleObjectMixin,self).get_object(self, *args,
> **kwargs)
>
> from django.views.generic import ListView, DetailView
>
> but if I do the below it works(but prefer to not have to add this to
> each CBV).
>
> class ItemDetailView(DetailView):
> model=Item
>
> def get_object(self):
> queryset = self.get_queryset()
> pk = pid_to_oid(self.kwargs.get('pk'))
> queryset = queryset.filter(pk=pk)
> obj = queryset.get()
> return obj
>
> Thanks in advance for the help.
>
> Dave
>
>
>
I'm not quite sure what you're trying to do here, especially in your use of
"superclass" rather than the more normal "subclass". In any case, you can't
simply subclass something but call your class the same name as the parent
class and just expect all references to the superclass to be magically
replaced by your class.
The thing I guess you're missing is that SingleObjectMixin is, well, a
mixin. So you can just mix it in to your view class:
class ItemDetailView(MySingleObjectMixin, DetailView):
and according to Python's rules of inheritance, it will find your
get_object method in place of the original one.
--
DR.
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