python - Django 中的月份列表

Question

我正在尝试创建一个包含月份列表的选择表单，但我似乎无法正确发布它。

表格:

   class MonthForm(forms.Form):
        months = [('January','January'),
                  ('February','February'),
                  ('March','March'),
                  ('April','April'),
                  ('May','May'),
                  ('June','June'),
                  ('July','July'),
                  ('August','August'),
                  ('September','September'),
                  ('October','October'),
                  ('November','November'),
                  ('December','December'),]
        month = forms.ChoiceField(months)

查看:

def table_view(request):
    if request.method == 'POST':
        month = MonthForm(request.POST).cleaned_data['month']
        print month

我不断收到此错误:

'MonthForm' object has no attribute 'cleaned_data'

Answer 1

只有在使用 is_valid() 验证表单后，cleaned_data 属性才会出现。

只需将代码更改为

def table_view(request):
    if request.method == 'POST':
        form = MonthForm(request.POST)
        if form.is_valid():
            print form.cleaned_data['month']

---

在内部，如果检测到任何错误，cleaned_data 属性将被删除(请参见 forms/forms.py 第 270 行左右)，因此无法访问:

if self._errors:
    delattr(self, 'cleaned_data')

---

另请参阅:http://docs.djangoproject.com/en/dev/topics/forms/?from=olddocs#processing-the-data-from-a-form