On Nov 10, 2015 11:53 PM, "Daniel Sears" <daniel.se...@gmail.com> wrote:
>
> I want to create a list view that searches a large dataset. But it seems
that if I use a filterset with empty defaults, then my view displays my
entire dataset.
>
> If tried creating a get_queryset method in my view that detects whether
my filter fields are empty, but this doesn't seem to have any effect:
>
> from django_filters.views import FilterView
> from .filters import ProductFilter
>
> class ProductView(FilterView):
> filterset_class = ProductFilter
> template_name = 'product_filter.html'
>
> def get_queryset(self):
> qs = super(ProductView, self).get_queryset()
> if '' not in self.request.GET.items():
> return qs.none()
> else:
> return qs
>
Yeah, you should probably remove that entire get_queryset() method and let
the FilterView do it's job.
> I looked at and experimented with STRICTNESS, but it didn't seem to have
any effect either. How can I create a view that refrains from displaying
data until I give it valid filter fields?
>
> Thanks.
I'm guessing you are using a third party package that provides FilterView,
although you didn't mention one.
Since I don't know what that inherits from, I'm going to guess ListView,
which uses a *.all() queryset by default. The easiest thing to do would be
to set your initial queryset to *.none() within your class definition,
assuming you are filtering the Product model:
class ProductView(FilterView):
queryset = Product.objects.none()
filterset_class = ProductFilter
template_name = 'product_filter.html'
If that doesn't work (not sure if you can chain filters on top of .none()
and get results, which is probably what FilterView is doing. I'm on my
phone so I can't check), you can also try Product.objects.filter().
-James
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