django form clean_xxx

1.如果form想单独验证一个字段可以定义如下函数:def clean_password2,password2就是定义的字段名称：

class UserForm(forms.ModelForm):
    password = forms.CharField(widget=forms.PasswordInput)
    password2 = forms.CharField(widget=forms.PasswordInput)
    class Meta:
        model = User
        fields =('username','email')

    def clean_password2(self):
        cd = self.cleaned_data
        if cd["password"] !=cd["password2"]:
            raise forms.ValidationError("密码不一致")
        else:
            return cd["password2"]

系统先调用系统的clean_data函数然后在调用自定义的clean_xxx
在form.is_valid()函数调用的时候会触发自定义的clean_xxx