内联过滤 django admin - 限制选择列表

鉴于我的内联管理：

class TestInlineAdmin(admin.TabularInline):
    model = Test.questions.through
    extra = 0  

and then

class QuestionAdmin(admin.ModelAdmin):
    inlines = [TestInlineAdmin, ]

Test型号有question字段是多对多。我通常可以直接从测试模型编辑问题列表。 但我希望能够从 QuestionAdmin 内的内联管理中选择测试（因此，相反）。 这有效。但我需要过滤此内联中的测试对象，因此选择列表只会向我显示Test.objects.filter(适用=False).

我尝试使用 get_queryset，但这似乎对选择列表没有影响，它只是过滤内联中的实际引用项目，但新项目的选择列表始终向我显示测试模型的完整未过滤查询集。

覆盖 formfield_for_manytomany 在内联中不起作用 - 它根本不执行。 是否可以通过 formfield_overrides 来实现？ 或者，我相信唯一的方法是自定义内联表单？

-Edit-

我的模型定义了 ManyToMany：

class Test(models.Model):
    title = models.CharField(max_length=80)
    description = models.TextField(null=True)
    position = models.ForeignKey('repository.Position', on_delete=models.CASCADE, null=True)
    questions = models.ManyToManyField('questions.Question')
    applicable = models.BooleanField(default=False)

-- 已编辑 -- 威廉提案后的回溯

2021-09-03 07:50:37 | ERROR | /usr/local/lib64/python3.6/site-packages/django/utils/log.py | log_response | - Internal Server Error: /admin/questions/question/45/change/
Traceback (most recent call last):
  File "/usr/local/lib64/python3.6/site-packages/django/core/handlers/exception.py", line 47, in inner
    response = get_response(request)
  File "/usr/local/lib64/python3.6/site-packages/django/core/handlers/base.py", line 181, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/usr/local/lib64/python3.6/site-packages/django/contrib/admin/options.py", line 614, in wrapper
    return self.admin_site.admin_view(view)(*args, **kwargs)
  File "/usr/local/lib64/python3.6/site-packages/django/utils/decorators.py", line 130, in _wrapped_view
    response = view_func(request, *args, **kwargs)
  File "/usr/local/lib64/python3.6/site-packages/django/views/decorators/cache.py", line 44, in _wrapped_view_func
    response = view_func(request, *args, **kwargs)
  File "/usr/local/lib64/python3.6/site-packages/django/contrib/admin/sites.py", line 233, in inner
    return view(request, *args, **kwargs)
  File "/usr/local/lib64/python3.6/site-packages/django/contrib/admin/options.py", line 1656, in change_view
    return self.changeform_view(request, object_id, form_url, extra_context)
  File "/usr/local/lib64/python3.6/site-packages/django/utils/decorators.py", line 43, in _wrapper
    return bound_method(*args, **kwargs)
  File "/usr/local/lib64/python3.6/site-packages/django/utils/decorators.py", line 130, in _wrapped_view
    response = view_func(request, *args, **kwargs)
  File "/usr/local/lib64/python3.6/site-packages/django/contrib/admin/options.py", line 1534, in changeform_view
    return self._changeform_view(request, object_id, form_url, extra_context)
  File "/usr/local/lib64/python3.6/site-packages/django/contrib/admin/options.py", line 1598, in _changeform_view
    formsets, inline_instances = self._create_formsets(request, obj, change=True)
  File "/usr/local/lib64/python3.6/site-packages/django/contrib/admin/options.py", line 1954, in _create_formsets
    for FormSet, inline in self.get_formsets_with_inlines(*get_formsets_args):
  File "/usr/local/lib64/python3.6/site-packages/django/contrib/admin/options.py", line 798, in get_formsets_with_inlines
    yield inline.get_formset(request, obj), inline
  File "/usr/local/lib64/python3.6/site-packages/django/contrib/admin/options.py", line 2053, in get_formset
    fields = flatten_fieldsets(self.get_fieldsets(request, obj))
  File "/usr/local/lib64/python3.6/site-packages/django/contrib/admin/options.py", line 335, in get_fieldsets
    return [(None, {'fields': self.get_fields(request, obj)})]
  File "/usr/local/lib64/python3.6/site-packages/django/contrib/admin/options.py", line 326, in get_fields
    form = self._get_form_for_get_fields(request, obj)
  File "/usr/local/lib64/python3.6/site-packages/django/contrib/admin/options.py", line 2138, in _get_form_for_get_fields
    return self.get_formset(request, obj, fields=None).form
  File "/usr/local/lib64/python3.6/site-packages/django/contrib/admin/options.py", line 2135, in get_formset
    return inlineformset_factory(self.parent_model, self.model, **defaults)
  File "/usr/local/lib64/python3.6/site-packages/django/forms/models.py", line 1082, in inlineformset_factory
    FormSet = modelformset_factory(model, **kwargs)
  File "/usr/local/lib64/python3.6/site-packages/django/forms/models.py", line 879, in modelformset_factory
    error_messages=error_messages, field_classes=field_classes)
  File "/usr/local/lib64/python3.6/site-packages/django/forms/models.py", line 555, in modelform_factory
    return type(form)(class_name, (form,), form_class_attrs)
  File "/usr/local/lib64/python3.6/site-packages/django/forms/models.py", line 258, in __new__
    apply_limit_choices_to=False,
  File "/usr/local/lib64/python3.6/site-packages/django/forms/models.py", line 179, in fields_for_model
    formfield = formfield_callback(f, **kwargs)
  File "/usr/local/lib64/python3.6/site-packages/django/contrib/admin/options.py", line 172, in formfield_for_dbfield
    formfield.widget, db_field.remote_field, self.admin_site, **wrapper_kwargs
AttributeError: 'dict' object has no attribute 'widget'

您可以限制QuerySet of the TestInlineAdmin with:

class TestInlineAdmin(admin.TabularInline):
    model = Test.questions.through
    extra = 0
    
    def formfield_for_foreignkey(self, db_field, request, **kwargs):
        if db_field.name == 'test':
            kwargs['queryset'] = Test.objects.filter(applicable=False)
        return super().formfield_for_foreignkey(db_field, request, **kwargs)