django-filter example

class CourseFilter(django_filters.FilterSet):
    provider = django_filters.AllValuesFilter(widget=django_filters.widgets.LinkWidget)
    subject = django_filters.AllValuesFilter(widget=django_filters.widgets.LinkWidget)

    class Meta:
        model = Course
        fields = ['provider', 'subject']

class ProviderFilter(django_filters.FilterSet):
    country = django_filters.AllValuesFilter(widget=django_filters.widgets.LinkWidget)
    class Meta:
        model = Provider
        fields = ['country']