Django 表单不调用 clean_

Question

我正在尝试验证表单(它以前曾经工作过)。出于某种原因，我似乎无法在调用 form.is_valid() 时调用各种清理函数，例如 clean_username(self) 。

我知道还没有足够的检查(你看到它们正在 build 中;-))，但这是我的类(class):

  class LoginForm(forms.Form):
    username = forms.CharField(max_length=30)
    password = forms.CharField(max_length=30,widget=forms.PasswordInput)

    def clean_password(self):
        print "Cleaning password"
        password = self.cleaned_data['password']
        if password == u"":
            raise forms.ValidationError("Password is blank.")
        return password

    def clean_username(self):
        username = self.cleaned_data['username']
        if len(username) < 4:
            raise forms.ValidationError("Username is fewer than four charecters.")
        return username


class RegistrationForm( LoginForm ):
        confirm_password = forms.CharField(widget=forms.PasswordInput, max_length=30)
        email = forms.EmailField()

        def clean_confirm_password(self):
            print "Cleaning confirm password"
            clean_confirm_password = self.cleaned_data['confirm_password']
            if clean_confirm_password == u"":
                raise forms.ValidationError("Confirming password is blank.")
            return clean_confirm_password

        def clean(self):
            print "Running clean on a registration form"
            print self.cleaned_data.items()
            password = self.cleaned_data['password']
            confirm = self.cleaned_data['confirm_password']
            if password != confirm:
                raise forms.ValidationError('Passwords do not match.')
            return self.cleaned_data

谢谢!

Answer 1

我在潜入 Django 后发现了错误的根源 forms.py 来源。

似乎如果一个字段留空，表单会在调用 field.clean() 后为该字段引发 ValidationError ，但它不会调用 clean_<fieldname> ，但它仍然调用该类的主要 clean 方法。为了处理使用这些空白字段的干净方法，您必须执行以下操作:

def clean(self):
    try:
        password = self.cleaned_data['password']
        # etc
    except KeyError:
        raise ValidationError('The password field was blank.')

    return self.cleaned_data