如何更改django-filter筛选键？

import django_filters

from .models import YourModel

class YourFilter(django_filters.FilterSet):
    # 定义筛选字段
    your_field = django_filters.CharFilter(field_name='your_model_field', lookup_expr='icontains')

    class Meta:
        model = YourModel
        fields = ['your_field']  # 指定要筛选的字段
        filter_overrides = {
            models.CharField: {
                'filter_class': django_filters.CharFilter,  # 筛选条件为CharFilter
                'extra': lambda f: {
                    'lookup_expr': 'icontains',  # 筛选条件为icontains（包含）
                },
            },
        }

# 在视图中使用自定义的过滤器类进行筛选
def your_view(request):
    queryset = YourModel.objects.all()
    filter = YourFilter(request.GET, queryset=queryset)
    filtered_queryset = filter.qs

    # 其他处理逻辑