Django管理 - 'NoneType'對象沒有屬性'_deferred'

我嘗試導入數據到db解析textarea，但我得到這個錯誤： 'NoneType' object has no attribute '_deferred'。我做錯了什麼？謝謝。Django管理 - 'NoneType'對象沒有屬性'_deferred'

# admin.py 
class AppleAdmin(admin.ModelAdmin): 
    def get_form(self, request, obj=None, **kwargs): 
     if obj is None: 
      return AddApple 

     super(AppleAdmin, self).get_form(request, obj=None, **kwargs) 

    def save_model(self, request, obj, form, change): 
     return 

    def save_related(self, request, form, formsets, change): 
     return 

admin.site.register(Apple, AppleAdmin)

。

# models.py 
class Apple(models.Model): 
    banana = models.CharField(max_length=255) 

    def add_banana(self, banana): 
     self.banana = banana.replace('apple', 'banana')

。

# forms.py 
class AddApple(forms.ModelForm): 
    class Meta: 
     model = Apple 
     fields = ('apples',) 

    apples = forms.CharField(widget=forms.Textarea) 

    def save(self, commit=True): 
     apples = [] 

     for x in self.cleaned_data.get("apples").splitlines(): 
      if not x.strip(): 
       continue 

      a = Apple() 
      a.add_banana(x.strip()) 

      apples.append(a) 

     Apple.objects.bulk_create(apples) 

     super(AddApple, self).save(commit=commit)

所以，使用此代碼我得到這個錯誤+追蹤：

Traceback: 
File "|site-packages\django\core\handlers\base.py" in get_response 
    132.      response = wrapped_callback(request, *callback_args, **callback_kwargs) 
File "|site-packages\django\contrib\admin\options.py" in wrapper 
    616.     return self.admin_site.admin_view(view)(*args, **kwargs) 
File "|site-packages\django\utils\decorators.py" in _wrapped_view 
    110.      response = view_func(request, *args, **kwargs) 
File "|site-packages\django\views\decorators\cache.py" in _wrapped_view_func 
    57.   response = view_func(request, *args, **kwargs) 
File "|site-packages\django\contrib\admin\sites.py" in inner 
    233.    return view(request, *args, **kwargs) 
File "|site-packages\django\contrib\admin\options.py" in add_view 
    1516.   return self.changeform_view(request, None, form_url, extra_context) 
File "|site-packages\django\utils\decorators.py" in _wrapper 
    34.    return bound_func(*args, **kwargs) 
File "|site-packages\django\utils\decorators.py" in _wrapped_view 
    110.      response = view_func(request, *args, **kwargs) 
File "|site-packages\django\utils\decorators.py" in bound_func 
    30.     return func.__get__(self, type(self))(*args2, **kwargs2) 
File "|contextlib.py" in inner 
    30.     return func(*args, **kwds) 
File "|site-packages\django\contrib\admin\options.py" in changeform_view 
    1470.      self.log_addition(request, new_object) 
File "|site-packages\django\contrib\admin\options.py" in log_addition 
    808.    content_type_id=get_content_type_for_model(object).pk, 
File "|site-packages\django\contrib\admin\options.py" in get_content_type_for_model 
    65.  return ContentType.objects.get_for_model(obj, for_concrete_model=False) 
File "|site-packages\django\contrib\contenttypes\models.py" in get_for_model 
    53.   opts = self._get_opts(model, for_concrete_model) 
File "|site-packages\django\contrib\contenttypes\models.py" in _get_opts 
    31.   elif model._deferred: 

Exception Type: AttributeError at /apples/apple/add/ 
Exception Value: 'NoneType' object has no attribute '_deferred'

來源

2015-07-20 Patrick Burns

我不明白爲什麼你還覆蓋在管理類這些方法只是return - 你確實需要調用那裏的保存方法。

但是，您的直接問題的根源在於您沒有從窗體的save方法返回對象。它應該是：

return super(AddApple, self).save(commit=commit)

來源

2015-07-20 11:03:48

哦.. 。謝謝。我非常無心。 –

我認爲你有一個問題在這裏：

def get_form(self, request, obj=None, **kwargs): 
    if obj is None: 
     return AddApple 

    super(AppleAdmin, self).get_form(request, obj=None, **kwargs)

應該是：

def get_form(self, request, obj=None, **kwargs): 
    if obj is None: 
     return AddApple 

    return super(AppleAdmin, self).get_form(request, obj, **kwargs)

注意return，而不是迫使obj=None

來源

2015-07-20 11:26:08 Anentropic

Django管理 - 'NoneType'對象沒有屬性'_deferred'

回答

相關問題