Django：向模型添加一個字段

我想向ModelForm添加一個額外的字段。這似乎很容易，但我得到了以下錯誤：Django：向模型添加一個字段

Django Version: 1.4 pre-alpha SVN-16573 
Exception Type: TypeError 
Exception Value:  
argument of type 'NoneType' is not iterable 
Exception Location: /usr/local/lib/django-trunk/django/forms/models.py in construct_instance, line 39 
Python Executable: /usr/bin/python 
Python Version: 2.6.6

這是代碼：

class NodeForm(forms.ModelForm): 
    password2 = forms.CharField(max_length=20, required=True, widget=forms.PasswordInput()) 

    class Meta: 
     model = Node 

    def __init__(self, *args, **kwargs): 
     super(NodeForm, self).__init__(*args, **kwargs) 
     # css classes for fields 
     for v in self.fields: 
      self.fields[v].widget.attrs['class'] = 'text ui-widget-content ui-corner-all' 

    def clean(self): 
     ''' Calls parent clean() and performs additional validation for the password field ''' 
     super(NodeForm, self).clean() 
     password = self.cleaned_data.get('password') 
     password2 = self.cleaned_data.get('password2') 
     # password and password2 must be the same 
     if password != password2: 
      raise forms.ValidationError('I due campi password non corrispondono.')

我無法修復它。我究竟做錯了什麼？

來源

2011-07-29 nemesisdesign

您正在使用從主幹（1.4）Django的，你能添加完整的堆棧跟蹤（誤差線在Django：'如果不f.editable或isinstance（f，models.AutoField）或不clean.data中的f.name） – christophe31

應該返回從作爲記錄here 也就是說clean方法清理數據：

def clean(self): 
    # perform checks 
    return self.cleaned_data

來源

2011-07-29 14:20:19 Kirill

我應該審閱文檔！謝謝。 – nemesisdesign

Django：向模型添加一個字段

回答

相關問題