如何更改django inlineformset_factory生成的表单集的外键列表？

from django.forms import inlineformset_factory
from .models import ParentModel, ChildModel

class ParentModel(models.Model):
    # 父模型的字段

class ChildModel(models.Model):
    parent = models.ForeignKey(ParentModel, on_delete=models.CASCADE)
    # 子模型的字段

ChildFormSet = inlineformset_factory(ParentModel, ChildModel, fields=('field1', 'field2'))

def my_view(request):
    parent_instance = ParentModel.objects.get(pk=1)
    formset = ChildFormSet(instance=parent_instance)
    # 其他处理逻辑

class CustomChildFormSet(ChildFormSet):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        # 在这里修改外键列表
        self.fields['parent'].queryset = ParentModel.objects.filter(...)

CustomChildFormSet = inlineformset_factory(ParentModel, ChildModel, formset=CustomChildFormSet, fields=('field1', 'field2'))