用FormView过滤django

Question

我的目标是在ListView中过滤对象。在模板中，我想要一个表单，从中过滤对象。所以我的形式：

class ProductFilterForm(forms.Form):
    CHOICES = ((x, x) for x in range(1, 10))
    width = forms.ChoiceField(choices=CHOICES)

的观点：

class ProductListView(ListView, FormView):
    model = Product
    paginate_by = 16
    template_name = 'product_list.html'
    form_class = ProductFilterForm

    def get_context_data(self, **kwargs):
        context = super(ProductListView, self).get_context_data(**kwargs)
        context['form'] = self.form_class
        return context

现在在模板中形成渲染，仅此而已。如何使其过滤对象？