Django 覆盖默认的 Django 表单答案

【问题标题】：Django override default Django formDjango 覆盖默认的 Django 表单
【发布时间】：2014-04-02 13:19:51
【问题描述】：

我的目的是覆盖默认的 Django PasswordResetForm 的 clean_email() 方法。这样做的目的是我想通过用户名而不是电子邮件检查用户是否存在（这正是我的应用程序业务逻辑的工作方式）。然后我就可以重设他的密码了。我应该如何覆盖该方法？更重要的是——如果我愿意，整个密码重置系统不会崩溃？

这是默认的 Django 代码：

class PasswordResetForm(forms.Form):
error_messages = {
    'unknown': _("That email address doesn't have an associated "
                 "user account. Are you sure you've registered?"),
    'unusable': _("The user account associated with this email "
                  "address cannot reset the password."),
}
email = forms.EmailField(label=_("Email"), max_length=254)

def clean_email(self):
    """
    Validates that an active user exists with the given email address.
    """
    UserModel = get_user_model()
    email = self.cleaned_data["email"]
    self.users_cache = UserModel._default_manager.filter(email__iexact=email)
    if not len(self.users_cache):
        raise forms.ValidationError(self.error_messages['unknown'])
    if not any(user.is_active for user in self.users_cache):
        # none of the filtered users are active
        raise forms.ValidationError(self.error_messages['unknown'])
    if any((user.password == UNUSABLE_PASSWORD)
           for user in self.users_cache):
        raise forms.ValidationError(self.error_messages['unusable'])
    return email

def save(self, domain_override=None,
         subject_template_name='registration/password_reset_subject.txt',
         email_template_name='registration/password_reset_email.html',
         use_https=False, token_generator=default_token_generator,
         from_email=None, request=None):
    """
    Generates a one-use only link for resetting password and sends to the
    user.
    """
    from django.core.mail import send_mail
    for user in self.users_cache:
        if not domain_override:
            current_site = get_current_site(request)
            site_name = current_site.name
            domain = current_site.domain
        else:
            site_name = domain = domain_override
        c = {
            'email': user.email,
            'domain': domain,
            'site_name': site_name,
            'uid': int_to_base36(user.pk),
            'user': user,
            'token': token_generator.make_token(user),
            'protocol': use_https and 'https' or 'http',
        }
        subject = loader.render_to_string(subject_template_name, c)
        # Email subject *must not* contain newlines
        subject = ''.join(subject.splitlines())
        email = loader.render_to_string(email_template_name, c)
        send_mail(subject, email, from_email, [user.email])

【问题讨论】：

标签： python django

【解决方案1】：

我认为你可以编写一个clean_username 方法来实现你想要的。这可能会有所帮助：Checking if username exists in Django

【讨论】：

【解决方案2】：

我想要实现这一点的原因是我想在 Django 注册中使用电子邮件作为用户名。我曾考虑将 Django 用户名字段命名为电子邮件字段，但我不知道从 Django 1.5 开始您可以指定 your own custom User model。

【讨论】：