Django網站，獲取錯誤__init __（）缺少1需要的位置參數：調用視圖時的'請求'

Question

當我嘗試加載我的edit_transaction視圖時，出現上述錯誤消息。我知道錯誤意味着什麼，但不明白爲什麼它發生在以前的工作中，並仍然在另一個類似的頁面上工作。如果需要的話可以提供更多的代碼，我想知道，如果在這裏有一些非常明顯的東西，那麼我看不到它。

完全回溯：

回溯：

文件「/Users/c/.virtualenvs/django-budget/lib/python3.5/site->packages/django/core/handlers/ exception.py「in 42. response = get_response（request）

File」/Users/c/.virtualenvs/django-budget/lib/python3.5/site->packages/django/core/handlers/ base.py「in _get_response 187. response = self.process_exception_by_middleware（e，request）

文件「/Users/c/.virtualenvs/django-budget/lib/python3.5/site-packages/django/core/handlers/base.py」in _get_response 185. response = wrapped_callback（request，* callback_args，** callback_kwargs）

文件 「/Users/c/.virtualenvs/django-budget/lib/python3.5/site-packages/django/contrib/auth/decorators.py」 在_wrapped_view 23回view_func（請求，*指定參數時，** kwargs）

在edit_transaction 83.形式= TransactionForm（例如=交易）

文件 「/Users/c/sites/budget/budget/views.py」

異常類型：類型錯誤在/預算/交易/ 3 /編輯/ 異常值：缺少1 INIT（）所需的位置參數：從urls.py

提取物 '請求'：

url(r'^transaction/(?P<pk>[0-9]+)/edit/$', views.edit_transaction, name='edit_transaction'), 

@login_required 
def edit_transaction(request, pk): 
    transaction = get_object_or_404(Transaction, pk=pk) 
    if request.method == "POST": 
     form = TransactionForm(request.POST, instance=transaction) 
     if form.is_valid(): 
      transaction = form.save(commit=False) 
      transaction.updated = timezone.now() 
      transaction.save() 
      return redirect('view_transaction_detail', pk=transaction.pk) 
    else: 
     form = TransactionForm(instance=transaction) 
    return render(request, 'budget/new_transaction.html', {'form': form}) 

模板提取物：從views.py

提取物

{% extends 'budget/base.html' %} 

{% block content %} 

    <h2>{{ transaction.title }}</h2> 
    <h4>{{ transaction.date }}</h4> 
    <h4>Transaction type: {{ transaction.transaction_type }}</h4> 
    <h4>Category: {{ transaction.category }}</h4> 
    <h4>Budgeted amount: {{ transaction.budgeted_amount }}</h4> 
    <h4>Actual amount: {{ transaction.actual_amount }}</h4> 
    <h4>Difference: {{ difference }}</h4> 
    <h4>Comments: {{ transaction.comments }}</h4> 

    <a class="btn btn-default" href="{% url 'edit_transaction' pk=transaction.pk %}"><span class="glyphicon glyphicon-pencil"></span></a> 
    <a class="btn btn-default" href="{% url 'delete_transaction' pk=transaction.pk %}"><span class="glyphicon glyphicon-remove"></span></a> 
    <h5><a href="{% url 'summary' %}">Back to summary</a></h5> 

{% endblock %} 

編輯補充TranscationForm代碼

class TransactionForm(forms.ModelForm): 

    class Meta: 
     model = Transaction 
     fields = ('title', 'transaction_type', 'category', 'budgeted_amount', 'actual_amount', 'date', 'comments',) 

    #new_category field to allow you to add a new category 
    new_category = forms.CharField(max_length=30, required=False, label="New Category Title") 

    def __init__(self, request, *args, **kwargs): 
     super(TransactionForm, self).__init__(*args, **kwargs) 
     #category is now not a required field because you will use category OR new_category 
     self.fields['category'].required=False 
     #set to allow use of self.request.user to set user for category 
     self.request = request 

    def clean(self): 
     category = self.cleaned_data.get('category') 
     new_category = self.cleaned_data.get('new_category') 
     if not category and not new_category: 
      # raise an error if neither a category is selected nor a new category is entered 
      raise forms.ValidationError('Category or New category field is required') 
     elif not category: 
      # create category from new_category 
      category, created = Category.objects.get_or_create(title=new_category, defaults={'user': self.request.user}) 
      self.cleaned_data['category'] = category 

     return super(TransactionForm, self).clean() 

Answer 1

好像你應該寫：的

form = TransactionForm(request=request, instance=transaction) 

代替：

form = TransactionForm(request.POST, instance=transaction)