Question

我想在ModelForm中添加一个额外的字段。这似乎很容易，但我收到以下错误：

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

这是代码：

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.')

我无法修复它。我做错了什么？

Answer 1

您应该按照clean方法从def clean(self): # perform checks return self.cleaned_data方法返回已清理的数据here 那就是：

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Django：在模型中添加一个字段

1 个答案: