Python django可选格式保存

我正在使用插件。从：

如果是从基于模型的查找扩展而来的查找，则新创建的项尚未保存到数据库中，保存应由表单处理

型号：

class UserSettings(models.Model):
   user = models.ForeignKey(UserProfile, related_name='own_user')
   lookup_user = models.ManyToManyField(UserProfile, related_name='other_user')
   category = models.ManyToManyField(NewsCategory)
   tag = models.ManyToManyField(Tag)

表格：

查找：

class UserLookUp(ModelLookup):
    model = UserProfile
    search_fields = ('first_name__icontains', )

    filters = {'is_active': True, }

    def get_item_value(self, item):
        return item.get_full_name()

    def get_item_label(self, item):
        return u"(%s)" % (item.get_full_name())

registry.register(UserLookUp)



@login_required
class TagLookUp(ModelLookup):
    model = Tag
    search_fields = ('slug__icontains', )


    def get_item_value(self, item):
        return item.name

    def get_item_label(self, item):
        return u"(%s)" % (item.name)

registry.register(TagLookUp)

和视图：

def user_settings(request):
    try:
       set = UserSettings.objects.filter(blabla)[0]
    except:
       set = None
    if request.method == 'POST':
        form = UserSettingsForm(request.POST)
        if form.is_valid():
            obj = form.save(commit=False)
            obj.user = user
            obj.save()
            form.save_m2m()
            return HttpResponseRedirect('/')
    else:
        form = UserSettingsForm(instance=set)
    return render_to_response('main/settings.html', {'form':form,},
                              context_instance=RequestContext(request))

错误：

TypeError at /news/settings/
int() argument must be a string or a number, not 'list'
Request Method: POST
Request URL:    http://localhost:8000/news/settings/
Django Version: 1.4
Exception Type: TypeError
Exception Value:    
int() argument must be a string or a number, not 'list'
Exception Location: /Library/Python/2.7/site-packages/django/db/models/fields/__init__.py in get_prep_value, line 537

在django可选的情况下，表单无法与此视图一起保存。如何使用此插件保存表单

---

提前感谢

我已通过更换此解决了此问题：

category = TreeNodeChoiceField(
    required=False,
    queryset=NewsCategory.objects.filter(status=True, is_deleted =False), label=u"Kategori", widget=forms.SelectMultiple(attrs={'class':'uniformselect'})
    )

据此：

category = forms.ModelMultipleChoiceField(queryset=NewsCategory.objects.filter(parent__isnull=False, status=True, is_deleted=False)

---

为什么它不能拯救？你有错误吗？表格是否无效？我已编辑了我的问题。谢谢马克。这只是堆栈跟踪的一半（最多）。它没有指明无法保存的字段。request.POST.items（）[（u'category'，u'6'），（u'usersettings'，u'Send'），（u'tag_0'，u'2'），（u'lookup_user_0'，u'），（u'lookup_user_1'，u'4'），（u'csrfmiddlewaretoken'，u'lucbebebobchcjyfxehqepa4drw3vcjkqsu但错误发生在form UserSettingsForm之后（request.POST）

category = forms.ModelMultipleChoiceField(queryset=NewsCategory.objects.filter(parent__isnull=False, status=True, is_deleted=False)