[Answered ]-How to pass queryset or kwarg to RangeFilter class in Django filters

by

1👍

you can modify the PriceFilter class to accept the queryset and use it to determine the price range

class PriceFilter(RangeFilter):
    def __init__(self, queryset=None, *args, **kwargs):
        super().__init__(*args, **kwargs)
        if queryset is not None:
            values = [p.price for p in queryset]
            min_value = min(values) if values else 0
            max_value = max(values) if values else 0
            self.extra['widget'] = CustomRangeWidget(attrs={'label': _('Price, €'), 'data-range_min': min_value, 'data-range_max': max_value})
        else:
            self.extra['widget'] = CustomRangeWidget(attrs={'label': _('Price, €'), 'data-range_min': 0, 'data-range_max': 0})

then you would pass the queryset from your PropertyListView to the PropertyFilter and subsequently to the PriceFilter:

class PropertyFilter(FilterSet):
    price = PriceFilter(queryset=Property.objects.none()) # initialize with an empty queryset
    def __init__(self, data=None, queryset=None, *args, **kwargs):
        if queryset is not None:
            self.price = PriceFilter(queryset=queryset, *args, **kwargs)
        super().__init__(data, queryset, *args, **kwargs)
    # other filters

    class Meta:
        model = Property
        fields = ['price', ...]

and now in your PropertyListView you can pass the queryset to the PropertyFilter:

class PropertyListView(ListView):
    model = Property

    def get_queryset(self):
        queryset = Property.objects.filter(status='your_status_goes_here')
        return queryset

    def get_context_data(self):
        context = super().get_context_data(**kwargs)
        property_filter = PropertyFilter(data=self.request.GET, queryset=self.get_queryset())
        context['filter'] = property_filter
        return context

this way the PriceFilter will consider only the prices from the filtered queryset ensuring that the slider reflects the appropriate price range.

I hope this helps you.

👤Kiarash Gh

Leave a comment