'generic_inlineformset_factory'產生''NoneType'對象沒有屬性'_meta'「

Question

我無法使用generic_inlineformset_factory保存我的前端選項。

如果我不選擇在前端什麼，行sports = sports_formset.save(commit=False)不會產生任何錯誤，但如果讓我選擇什麼，我得到'NoneType' object has no attribute '_meta'

的# PROBLEM PART在代碼的底部。

# models 
class M2MProfilesToSportTypeGroups(models.Model): 
    MASTERY_CHOICES = (
     (1, _('newby')), 
     (2, _('amateur')), 
     (3, _('semi-pro')), 
     (4, _('pro')) 
    ) 

    mastery = models.IntegerField(_('mastery'), null=True, blank=True, choices=MASTERY_CHOICES) 
    sport_type_group = models.ForeignKey(SportTypesGroups, verbose_name=_('sport type group')) 

    content_type = models.ForeignKey(ContentType, on_delete=models.CASCADE) 
    object_id = models.PositiveIntegerField() 
    content_object = GenericForeignKey('content_type', 'object_id') 

# views 
class CompanyProfileCreateView(LoginRequiredMixin, TemplateView): 
    template_name = 'profiles/create_n_update.html' 

    def get(self, request, *args, **kwargs): 
     profile_form = CompanyProfileForm() #show_criterias=False) 

     PlaceTypeFormSet = inlineformset_factory(CompanyProfiles, M2MCompanyProfilesToPlaceTypeGroups, 
               fields='__all__', can_delete=False) 

     SportTypeFormSet = generic_inlineformset_factory(M2MProfilesToSportTypeGroups, 
                 can_delete=False) 

     places_formset = PlaceTypeFormSet() 
     sports_formset = SportTypeFormSet() 

     return self.render_to_response({'form': profile_form, 
             'places_formset': places_formset, 
             'sports_formset': sports_formset}) 

    def post(self, request, *args, **kwargs): 

     profile_form = CompanyProfileForm(data=request.POST) 


     PlaceTypeFormSet = inlineformset_factory(CompanyProfiles, M2MCompanyProfilesToPlaceTypeGroups, 
               fields='__all__', can_delete=False) 

     SportTypeFormSet = generic_inlineformset_factory(M2MProfilesToSportTypeGroups, 
                 can_delete=False) 

     places_formset = PlaceTypeFormSet(data=request.POST) 
     sports_formset = SportTypeFormSet(data=request.POST) 

     if profile_form.is_valid() and places_formset.is_valid() and sports_formset.is_valid(): 
      profile_form.instance.created_by = request.user 
      company_profile = profile_form.save() 

      places = places_formset.save(commit=False) 
      for place in places: 
       place.company_profile = company_profile 
       place.save() 

      # PROBLEM PART 
      sports = sports_formset.save(commit=False) 
      for sport in sports: 
       obj.content_object = company_profile 
       obj.save() 

      return redirect(company_profile) 

     return self.render_to_response({'form': profile_form, 
             'places_formset': places_formset, 
             'sports_formset': sports_formset}) 

任何意見讚賞。

Answer 1

找到解決辦法。

的# PROBLEM PART改變：

sports_formset = SportTypeFormSet(data=request.POST, instance=company_profile) 
sports_formset.save() 

提供company_profile我們讓Django的找出來，用什麼樣的content_type和object_id。