Question

我在Django 1.0网站开发中复制了一个用户注册页面的简单示例。我已经定义了以下形式：

class RegistrationForm(forms.Form):
    username = forms.CharField(label=u'Username', max_length=30)
    email = forms.EmailField(label=u'Email')
    password1 = forms.CharField(
        label=u'Password',
        widget=forms.PasswordInput()
    )
    password2 = forms.CharField(
        label=u'Password (Again)',
        widget=forms.PasswordInput()
    ) 

    def clean_password2(self):
        if 'password1' in self.cleaned_data:
            password1 = self.cleaned_data['password1']
            password2 = self.cleaned_data['password2']
            if password1 == password2:
                return password2
        raise forms.ValidationError('Passwords do not match.')

    def clean_username(self):
        print "Validating username..."
        username = self.cleaned_data['username']
        if not re.search(r'^\w+', username):
            raise forms.ValidationError('Username can only contain '
                                        'alphanumeric characters and the underscore.')
        try:
            User.objects.get(username=username)
        except User.DoesNotExist:
            return username
        raise forms.ValidationError('Username is already taken')

如果已经使用了用户名，则使用普通表单验证验证该字段，并且不调用我的自定义清理方法。当表单提交到register_page时，form.is_valid（）返回True。

为了让Django知道调用clean_方法，是否需要完成某些工作？

def register_page(request):
    if request.method == 'POST':
        print "Posted to registration form"
        form = RegistrationForm(request.POST)
        if form.is_valid():
            user = User.objects.create_user(
                username=form.cleaned_data['username'],
            password=form.cleaned_data['password1'],
                email=form.cleaned_data['email']
            )
            return HttpResponseRedirect('/')
    else:
        form = RegistrationForm()

    return render_to_response(
        'users/registration.html',
        context_instance=RequestContext(request, {
                'form' : form
                })

Answer 1

如果有其他人通过谷歌到达这里并且上述答案没有帮助：

我遇到了同样的问题，事实证明我并没有将排除设置为我的表单元组中的元组：

class MyFormClass(ModelForm):
    class Meta:
        exclude = ('type_detail')  #wrong

而不是：

class MyFormClass(ModelForm):
    class Meta:
        exclude = ('type_detail', )  #right

Answer 2

这真是令人费解。我恢复了forms.py的自动保存版本，它神奇地开始工作，但我可以辨别上面的代码片段和恢复的文件。

简短回答：“程序员错误”

Django form.is_valid（）没有调用方法clean_ <fieldname> </fieldname>

2 个答案: