Django仅过滤特定于queryset的选项

Question

I use django-filter to provide user filtering on a list view on my site, eg

class MyModel(models.Model):
    fruit = models.ForeignKey(Fruit)
    price = models.CharField(...)
    release_date = models.DateTimeField(...)

class MyFilter(filters.FilterSet):
    ...

    class Meta:
        model = MyModel
        fields = ['fruit', 'price', 'release_date']

def my_banana_orange_view(request):
   ...
   queryset = MyModel.objects.filter(fruit__name__in=['banana', 'orange'])
   filter = Filter(request.GET, queryset=queryset)

   return render(request, 'my_template.html', {'queryset': queryset, 'filter': filter})

Now if I do this, I can display just the MyModel entries that have either banana or orange relationships, but MyFilter will still give the option of all the fruits in the Fruit model. I'm trying to find a setting for a FilterSet to just show options related to the input queryset, but can't find one. Does one exist?

Otherwise I guess I would have to override the filter to do something like this:

class MyFilter(filters.FilterSet):

    def __init__(self, *args, **kwargs):
        super().__init__(self, *args, **kwargs)

        self.filters['fruit'].extra['queryset'] = Fruit.objects.filter(mymodel=self.queryset)

    class Meta:
        model = MyModel
        fields = ['fruit', 'price', 'release_date']

Which seems a bit overkill. Only showing options based on the input queryset seems like desirable behaviour, but I can't find any documentation for it. Is there a good way to do this? Any help appreciated!

Answer 1

The first param for FilterSet is data , the second is queryset .

Try something along the lines of filter = MyFilter(data=request.GET, queryset=queryset) in your view.

See: http://django-filter.readthedocs.io/en/develop/guide/usage.html#the-view