django表单向导和recaptcha

问题描述

我使用以下进行recaptcha集成

I did a recaptcha integration using the following django snippet

settings.py

    RECAPTCHA_PUBLIC_KEY = '<your public key>'
    RECAPTCHA_PRIVATE_KEY = '<your private key>'


#widgets.py

    from django import forms
    from django.utils.safestring import mark_safe
    from django.conf import settings
    from recaptcha import captcha

    class ReCaptcha(forms.widgets.Widget):
    recaptcha_challenge_name = 'recaptcha_challenge_field'
    recaptcha_response_name = 'recaptcha_response_field'

    def render(self, name, value, attrs=None):
        return mark_safe(u'%s' % captcha.displayhtml(settings.RECAPTCHA_PUBLIC_KEY))

    def value_from_datadict(self, data, files, name):
        return [data.get(self.recaptcha_challenge_name, None),
        data.get(self.recaptcha_response_name, None)]


#fields.py

    from django.conf import settings
    from django import forms
    from django.utils.encoding import smart_unicode
    from django.utils.translation import ugettext_lazy as _

    from marcofucci_utils.widgets import ReCaptcha
    from recaptcha import captcha

    class ReCaptchaField(forms.CharField):
    default_error_messages = {
        'captcha_invalid': _(u'Invalid captcha')
    }

    def __init__(self, *args, **kwargs):
        self.widget = ReCaptcha
        self.required = True
        super(ReCaptchaField, self).__init__(*args, **kwargs)

    def clean(self, values):
        super(ReCaptchaField, self).clean(values[1])
        recaptcha_challenge_value = smart_unicode(values[0])
        recaptcha_response_value = smart_unicode(values[1])
        check_captcha = captcha.submit(recaptcha_challenge_value,
        recaptcha_response_value, settings.RECAPTCHA_PRIVATE_KEY, {})
        if not check_captcha.is_valid:
        raise forms.util.ValidationError(self.error_messages['captcha_invalid'])
        return values[0]


#forms.py

    class RegistrationForm(forms.Form):
    ...
    recaptcha = marcofucci_fields.ReCaptchaField()
    ...

但是我已经定义了表单在django表单向导中，即使验证码包含在最后一个表单中，也会在该字段上调用clean方法。

But I have the forms defined in the django forms wizard and it calls the clean method on the field twice, even if the captcha is included in the last form.

如下所示：

    from registration.forms import RegistrationWizard,RegistrationForm,ProfileForm

    url(r'^register/$',
        RegistrationWizard([RegistrationForm,ProfileForm]),
        name='register_wizard'),

如何规避这种情况？在最后一个表单上调用clean的需要是两次？

How do I circumvent this situation. What is the need to call the clean on the last form twice?

推荐答案

如果一个表单被绑定，它会一直调用clean当渲染（即使你不调用form.is_valid）。

If a form is bound, it will allways call clean when renderering (even if you don't call form.is_valid).

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