Django：'unicode'對象沒有屬性'get'

Question

我的Django程序有問題。我在Django初學者，我一直在尋找與相同的錯誤比我，但沒有成功，不同崗位的答案...似乎

Here's my traceback : 

Environment: 


Request Method: POST 
Request URL: http://127.0.0.1:8000/pod 

Django Version: 1.11.2 
Python Version: 2.7.13 
Installed Applications: 
['django.contrib.admin', 
'django.contrib.auth', 
'labinit', 
'django.contrib.contenttypes', 
'django.contrib.sessions', 
'django.contrib.messages', 
'django.contrib.staticfiles'] 
Installed Middleware: 
['django.middleware.security.SecurityMiddleware', 
'django.contrib.sessions.middleware.SessionMiddleware', 
'django.middleware.common.CommonMiddleware', 
'django.middleware.csrf.CsrfViewMiddleware', 
'django.contrib.auth.middleware.AuthenticationMiddleware', 
'django.contrib.messages.middleware.MessageMiddleware', 
'django.middleware.clickjacking.XFrameOptionsMiddleware'] 



Traceback: 

File "C:\Python27\lib\site-packages\django\core\handlers\exception.py" in inner 
    41.    response = get_response(request) 

File "C:\Python27\lib\site-packages\django\core\handlers\base.py" in _get_response 
    187.     response = self.process_exception_by_middleware(e, request) 

File "C:\Python27\lib\site-packages\django\core\handlers\base.py" in _get_response 
    185.     response = wrapped_callback(request, *callback_args, **callback_kwargs) 

File "C:\Users\admin\Desktop\django_learneo3\Learneo\labinit\views.py" in groupe_pod 
    121.  if form.is_valid(): 

File "C:\Python27\lib\site-packages\django\forms\forms.py" in is_valid 
    183.   return self.is_bound and not self.errors 

File "C:\Python27\lib\site-packages\django\forms\forms.py" in errors 
    175.    self.full_clean() 

File "C:\Python27\lib\site-packages\django\forms\forms.py" in full_clean 
    384.   self._clean_fields() 

File "C:\Python27\lib\site-packages\django\forms\forms.py" in _clean_fields 
    396.     value = field.widget.value_from_datadict(self.data, self.files, self.add_prefix(name)) 

File "C:\Python27\lib\site-packages\django\forms\widgets.py" in 

value_from_datadict 
    639.   getter = data.get 

Exception Type: AttributeError at /pod 
Exception Value: 'unicode' object has no attribute 'get' 

這個問題，因爲我已經改變了我初始化 fonction，爲我在我看來，使用以下形式：

形式：

class Groupe_Form(forms.ModelForm) :  
    def __init__(self, nom_groupe, *args, **kwargs): 
     super(Groupe_Form,self).__init__(*args, **kwargs) 
     self.fields['pod'].widget = forms.Select() 
     pod1 = Groupe.objects.filter(nom_groupe = nom_groupe).values_list('pod', flat = True) 
     pods = list(pod1) 
     self.fields['pod'].queryset = Pod.objects.filter(id__in=pods) 
    class Meta: 
     model = Groupe 
     fields = ['pod'] 

瀏覽：

def groupe_pod(request): 

    global new_groupe 
    grp = new_groupe 
    form = forms.Groupe_Form(request.POST, grp) 
    if request.method == 'POST': 
     if form.is_valid(): 
      print "form was valid" 
      data_groupe_pod = request.POST.get('grp_pod') 
      print "data_groupe :", data_groupe_pod 

      global new_cours 
      print new_cours 

      if new_cours == "ICND1": 
       return redirect('http://127.0.0.1:8000/icnd_1') 
      elif new_cours == "ICND2": 
       return redirect('http://127.0.0.1:8000/icnd_2')   
    else : 
     form = forms.Groupe_Form(new_groupe) 
    return render(request, 'pod.html', locals()) 

我試過很多東西，我真的不知道我的Django代碼中的問題在哪裏。

Answer 1

表單的__init__方法是：

form = forms.Groupe_Form(grp, request.POST) 

您目前擁有的論點倒過來：

def __init__(self, nom_groupe, *args, **kwargs): 

因此，你應該用實例化。

Answer 2

您的__init__簽名具有第一個參數nom_groupe。在form = forms.Groupe_Form(request.POST, grp)中，您通過request.POST作爲第一個參數。你必須切換參數：

form = forms.Groupe_Form(grp, request.POST)