在ModelAdmin我的应用程序中，我想change_view根据对象的特定条件更改 a 的内联。
class TextInline(generic.GenericStackedInline):
model = Text
class ImageInline(generic.GenericStackedInline):
model = Image
class VideoInline(generic.GenericStackedInline):
model = Video
class PageAdmin(models.ModelAdmin):
def add_view(self, request, form_url='', extra_context=None):
self.inlines = []
return super(PageAdmin, self).add_view(
request, form_url, extra_context)
def change_view(self, request, object_id, form_url='', extra_context=None):
obj = Page.objects.get(id=object_id)
if obj.page_type in ('foo', 'bar',):
self.inlines = [TextInline]
elif obj.page_type == 'baz':
self.inlines = [ImageInline, VideoInline]
return super(PageAdmin, self).change_view(
request, object_id, form_url, extra_context)
add_view按预期工作，不显示内联。change_view还会在初始加载时显示正确的内联，并在第一次保存后显示正确的内联实例。当再次保存页面时，MultiValueDictKeyError会引发 an。显然抱怨缺少内联实例。
Traceback:
File "/path/to/django/core/handlers/base.py" in get_response
111. response = callback(request, *callback_args, **callback_kwargs)
File "/path/to/django/contrib/admin/options.py" in wrapper
366. return self.admin_site.admin_view(view)(*args, **kwargs)
File "/path/to/django/utils/decorators.py" in _wrapped_view
91. response = view_func(request, *args, **kwargs)
File "/path/to/django/views/decorators/cache.py" in _wrapped_view_func
89. response = view_func(request, *args, **kwargs)
File "/path/to/django/contrib/admin/sites.py" in inner
196. return view(request, *args, **kwargs)
File "/path/to/presentation/admin.py" in change_view
151. request, object_id, form_url, extra_context)
File "/path/to/django/utils/decorators.py" in _wrapper
25. return bound_func(*args, **kwargs)
File "/path/to/django/utils/decorators.py" in _wrapped_view
91. response = view_func(request, *args, **kwargs)
File "/path/to/django/utils/decorators.py" in bound_func
21. return func(self, *args2, **kwargs2)
File "/path/to/django/db/transaction.py" in inner
209. return func(*args, **kwargs)
File "/path/to/django/contrib/admin/options.py" in change_view
1049. queryset=inline.queryset(request))
File "/path/to/django/contrib/contenttypes/generic.py" in __init__
402. prefix=prefix
File "/path/to/django/forms/models.py" in __init__
424. super(BaseModelFormSet, self).__init__(**defaults)
File "/path/to/django/forms/formsets.py" in __init__
50. self._construct_forms()
File "/path/to/django/forms/formsets.py" in _construct_forms
115. self.forms.append(self._construct_form(i))
File "/path/to/django/forms/models.py" in _construct_form
443. pk = self.data[pk_key]
File "/path/to/django/utils/datastructures.py" in __getitem__
258. raise MultiValueDictKeyError("Key %r not found in %r" % (key, self))
Exception Type: MultiValueDictKeyError at /admin/presentation/page/5/
Exception Value: "Key 'presentation-text-content_type-object_id-0-id' not found in <QueryDict: {u'status': [u'2'], u'presentation-text-content_type-object_id-1-text': [u'xxx'], u'title': [u'y'], u'presentation-text-content_type-object_id-0-text': [u'xx'], u'presentation-text-content_type-object_id-__prefix__-ordering': [u''], u'presentation-text-content_type-object_id-TOTAL_FORMS': [u'2'], u'presentation-text-content_type-object_id-0-ordering': [u''], u'presentation-text-content_type-object_id-1-ordering': [u''], u'presentation-text-content_type-object_id-__prefix__-text': [u''], u'presentation-text-content_type-object_id-MAX_NUM_FORMS': [u''], u'csrfmiddlewaretoken': [u'6f53e0394b9008494a53cf460826235c'], u'presentation': [u'1'], u'_continue': [u'Sichern und weiter bearbeiten'], u'presentation-text-content_type-object_id-INITIAL_FORMS': [u'1']}>"
我的问题与这个甚至提供解决方案的问题非常相似。然而，Django 1.4 更改了 api，因此ModelAdmin.inline_instances不再存在。
在 Django 1.4 中，您可以使用它ModelAdmin.get_inline_instances()来检索内联实例列表，但我不知道如何设置它们。或者在 Django 1.4 中有另一种方法吗？api更改可能是有原因的。