Hello, I have a filtered model

class Sku(object): manufacturer = ForeignKey(SomeModel)

I want to filter the manufacturer's field, but considering only those manufacturers that the displayed Sku have, can you tell me where to look? It is a little code about which speech:

 class SkuFilter(django_filters.FilterSet): # manufacturer__title = django_filters.CharFilter(lookup_expr='icontains') class Meta: model = Sku fields = ['manufacturer', ] # кусок из views # ... c['skus'] = self.object.skus.filter(hide=False, prices__price_type=PRICE_ROZN).prefetch_related('prices', 'stock').all().order_by( 'prices__value') sku_filter = SkuFilter(self.request.GET, c['skus']) # ...

That is, in the end, there can be 4 products in c ['skus'], and manufacturers in the filter display everything, and only those that are in these four products are needed.

    1 answer 1

    I did this: I created the field I needed without a filter, the metaclass magic did its job and created the base_filter, changed the selection.

     class SkuFilter(django_filters.FilterSet): def __init__(self, data=None, queryset=None, prefix=None, strict=None): self.base_filters['manufacturer'] = django_filters.filters.ModelMultipleChoiceFilter( name='manufacturer', to_field_name='title', queryset=Manufacturer.objects.filter( pk__in=queryset.values_list('manufacturer').distinct()), ) super().__init__(data, queryset, prefix, strict) manufacturer = django_filters.filters.ModelMultipleChoiceFilter( name='manufacturer', to_field_name='title', queryset=Manufacturer.objects.all() ) class Meta: model = Sku fields = ['manufacturer', ]