filter in multiple fields with django-filter

filters.py

class LocationFilter(django_filters.FilterSet):
    q = django_filters.CharFilter(method='my_custom_filter', label="Search")

    class Meta:
        model = Location
        fields = ['q']

    def my_custom_filter(self, queryset, name, value):
        return queryset.filter(
            Q(loc__icontains=value) |
            Q(loc_mansioned__icontains=value) | 
            Q(loc_country__icontains=value) | 
            Q(loc_modern__icontains=value)
        )