爲什麼我的django表單在我不打電話時驗證is_valid

Question

編輯：我確定了原因，因爲隨RHEL 7提供的python包。解決方案是安裝替代版本。就我而言，我只是將服務器移到了centOS，其中提供的python與django一起工作。

我有一個表單，它對我的​​home view有動作，它包含兩個按鈕，保存和取消。當在本地開發服務器（manage.py runserver）上運行時，這可以正常工作。當我將其推送到生產環境時，儘管沒有調用is_valid方法，取消按鈕仍會返回表單驗證錯誤。

這裏是視圖：

def home(request): 
#uses home.html 
if request.method == 'POST': 
    #Figure out which button was pressed 
    #Cancel Button - Back to home 
    if request.POST.get("cancel"): 
     #return HttpResponseRedirect(request.META.get('HTTP_REFERER')) 
     footer = request 
     lineitems = Budget.build(request.user) 
     c = {'lineitems': lineitems, 
      'footer':footer,} 
     return render(request, 'home.html', c) 
    #Save button on config.html IncomeForm/Expenses Form 
    if request.POST.get("config_save"): 
     #ExpensesForm submitted 
     if 'expenseName' in request.POST: 
      form = ExpensesForm(request.POST) 
      if form.is_valid(): 
       form.save() 
      else: 
       temp = 'config.html'  
       footer = 'Expense Form Invalid' 
       c = {'form':form, 
        'footer':footer,} 
       return render(request, temp, c) 
     #IncomeForm submitted 
     else: 
      form = IncomeForm(request.POST) 
      if form.is_valid(): 
       form.save() 
      else: 
       form = IncomeForm(request.POST) 
       temp = 'config.html'  
       footer = 'Form Invalid' 
       c = {'form':form, 
        'footer':footer,} 
       return render(request, temp, c) 
     #Use Budget Class to populate a table in template 
     Budget.update_data({'months':12, 
          'user':request.user}) 
     temp = 'home.html' 
     footer = '* Line Modified' 
     lineitems = Budget.build(request.user) 
     c = {'lineitems': lineitems, 
      'footer':footer,} 
     return render(request, temp, c) 
# if a GET (or any other method) we'll load the budget 
else: 
    footer = '* Line item modified' 
    footer = request 
    Budget.update_data({'user': request.user, 
         'months':12}) 
    lineitems = Budget.build(request.user) 
    c = {'lineitems': lineitems, 
     'footer':footer,} 
    return render(request, 'home.html', c) 

這裏是模板：

{% extends "base.html" %} 
{% load bootstrap3 %} 

{% block title %} 
<h1>Add {{ itemtype }}</h1> 
{% endblock %} 

{% block content %} 
<form action="{% url 'home' %}" method="post"> 
{% csrf_token %} 
{{ form.as_p }} 
<div class="btn-group"> 
<input type="submit" name="config_save" value="Save" class="btn btn-primary"/> 
<input type="submit" name="cancel" value="Cancel" class="btn btn-default"/> 
</div> 
</form> 
{% endblock %} 
{% block footer %} 
{{ footer }} 
{% endblock %} 

編輯*

我能夠在開發環境，以創建此問題，當我更換

{{ form.as_p }} 

與

{% bootstrap_form form layout='vertical' %} 

但不幸的是，這些工作在apache/wsgi服務器上運行時都沒有。

這是我的表格。注意我也嘗試刪除類：表單控件，並沒有什麼區別。我有另一種形式和視圖，行爲幾乎相同（取消處理與其他，表單是模型形式），唯一的區別是沒有日期字段。爲了排除這個問題，我排除了日期字段，但仍然存在相同的問題。

#Edit form to add/edit Expenses and Bills 
class ExpensesForm(forms.ModelForm): 
    class Meta: 
     model = Items 
     exclude = ('skiplst',) 
     widgets = {'user': forms.HiddenInput(), 
        'itemType': forms.HiddenInput(), 
        'itemName': forms.TextInput(attrs={'class':'form-control',}), 
        'category': forms.Select(attrs={'class':'form-control',}), 
        'itemAmount': forms.NumberInput(attrs={'class':'form-control',}), 
        'payCycle': forms.Select(attrs={'class':'form-control',}), 
        'itemNote': forms.TextInput(attrs={'class':'form-control',}), 
        'nextDueDate': forms.DateInput(attrs={'name': 'date', 
                 'class':'form-control'}), 
        'endDate': forms.DateInput(attrs={'name': 'date', 
                'class':'form-control'})} 

#Edit form to add/edit Income Sources 
class IncomeForm(forms.ModelForm): 
    class Meta: 
     model = Items 
     exclude = ('category','skiplst') 
     widgets = {'user': forms.HiddenInput(), 
        'itemType': forms.HiddenInput(), 
        'itemName': forms.TextInput(attrs={'class':'form-control',}), 
        'itemAmount': forms.NumberInput(attrs={'class':'form-control',}), 
        'payCycle': forms.Select(attrs={'class':'form-control',}), 
        'itemNote': forms.TextInput(attrs={'class':'form-control',}), 
        'nextDueDate': forms.DateInput(attrs={'name': 'date', 
                 'class':'form-control'}), 
        'endDate': forms.DateInput(attrs={'name': 'date', 
                'class':'form-control'})} 

Answer 1

它看起來像（略分不清，因爲格式化/壓痕熄滅略）當你的形式提交取消價值，它提交Cancel，而你檢查cancel，這樣的邏輯是永遠執行。